Question

我只需要UIDatePicker来选择月份和年份。我检查了班级参考文件。看起来UIDatePicker是UIView。我想象UIPickerView可能是一个子视图，我可以隐藏组件，如果我可以抓住它。但不是。那是不可能的。我必须创建自己的自定义选择器吗？有什么想法吗？

Answer 1

这是一个获得相同效果的解决方案。要使用此代码段，您应该在“缩进检查器”的“自定义类”中的nib文件中将UIPickerView替换为CDatePickerViewEx。

.h文件

#import <UIKit/UIKit.h>

@interface CDatePickerViewEx : UIPickerView <UIPickerViewDelegate, UIPickerViewDataSource> 

@property (nonatomic, strong, readonly) NSDate *date;
-(void)selectToday;

@end

.m文件

#import "CDatePickerViewEx.h"

// Identifiers of components
#define MONTH ( 0 )
#define YEAR ( 1 )    

// Identifies for component views
#define LABEL_TAG 43


@interface CDatePickerViewEx()

@property (nonatomic, strong) NSIndexPath *todayIndexPath;
@property (nonatomic, strong) NSArray *months;
@property (nonatomic, strong) NSArray *years;

-(NSArray *)nameOfYears;
-(NSArray *)nameOfMonths;
-(CGFloat)componentWidth;

-(UILabel *)labelForComponent:(NSInteger)component selected:(BOOL)selected;
-(NSString *)titleForRow:(NSInteger)row forComponent:(NSInteger)component;
-(NSIndexPath *)todayPath;
-(NSInteger)bigRowMonthCount;
-(NSInteger)bigRowYearCount;
-(NSString *)currentMonthName;
-(NSString *)currentYearName;

@end

@implementation CDatePickerViewEx

const NSInteger bigRowCount = 1000; 
const NSInteger minYear = 2008;
const NSInteger maxYear = 2030;
const CGFloat rowHeight = 44.f;
const NSInteger numberOfComponents = 2;

@synthesize todayIndexPath;
@synthesize months;
@synthesize years = _years;

-(void)awakeFromNib
{
    [super awakeFromNib];

    self.months = [self nameOfMonths];
    self.years = [self nameOfYears];
    self.todayIndexPath = [self todayPath];

    self.delegate = self;
    self.dataSource = self;

    [self selectToday];
}

-(NSDate *)date
{
    NSInteger monthCount = [self.months count];
    NSString *month = [self.months objectAtIndex:([self selectedRowInComponent:MONTH] % monthCount)];

    NSInteger yearCount = [self.years count];
    NSString *year = [self.years objectAtIndex:([self selectedRowInComponent:YEAR] % yearCount)];

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"MMMM:yyyy"];
    NSDate *date = [formatter dateFromString:[NSString stringWithFormat:@"%@:%@", month, year]];
    return date;
}

#pragma mark - UIPickerViewDelegate
-(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
    return [self componentWidth];
}

-(UIView *)pickerView: (UIPickerView *)pickerView
            viewForRow: (NSInteger)row
          forComponent: (NSInteger)component
           reusingView: (UIView *)view
{   
    BOOL selected = NO;    
    if(component == MONTH)
    {
        NSInteger monthCount = [self.months count];
        NSString *monthName = [self.months objectAtIndex:(row % monthCount)]; 
        NSString *currentMonthName = [self currentMonthName];
        if([monthName isEqualToString:currentMonthName] == YES)
        {
            selected = YES;
        }
    }
    else
    {
        NSInteger yearCount = [self.years count];
        NSString *yearName = [self.years objectAtIndex:(row % yearCount)];
        NSString *currenrYearName  = [self currentYearName];
        if([yearName isEqualToString:currenrYearName] == YES)
        {
            selected = YES;
        }
    }

    UILabel *returnView = nil;
    if(view.tag == LABEL_TAG)
    {
        returnView = (UILabel *)view;
    }
    else 
    {
        returnView = [self labelForComponent: component selected: selected];
    }

    returnView.textColor = selected ? [UIColor blueColor] : [UIColor blackColor];
    returnView.text = [self titleForRow:row forComponent:component];
    return returnView;
}

-(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
    return rowHeight;
}

#pragma mark - UIPickerViewDataSource
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return numberOfComponents;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    if(component == MONTH)
    {
        return [self bigRowMonthCount];
    }
    return [self bigRowYearCount];
}

#pragma mark - Util
-(NSInteger)bigRowMonthCount
{
    return [self.months count]  * bigRowCount;
}

-(NSInteger)bigRowYearCount
{
    return [self.years count]  * bigRowCount;
}

-(CGFloat)componentWidth
{
    return self.bounds.size.width / numberOfComponents;
}

-(NSString *)titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if(component == MONTH)
    {
        NSInteger monthCount = [self.months count];
        return [self.months objectAtIndex:(row % monthCount)]; 
    }
    NSInteger yearCount = [self.years count];
    return [self.years objectAtIndex:(row % yearCount)];
}

-(UILabel *)labelForComponent:(NSInteger)component selected:(BOOL)selected
{
    CGRect frame = CGRectMake(0.f, 0.f, [self componentWidth],rowHeight);

    UILabel *label = [[UILabel alloc] initWithFrame:frame];
    label.textAlignment = UITextAlignmentCenter;
    label.backgroundColor = [UIColor clearColor];
    label.textColor = selected ? [UIColor blueColor] : [UIColor blackColor];
    label.font = [UIFont boldSystemFontOfSize:18.f];
    label.userInteractionEnabled = NO;

    label.tag = LABEL_TAG;

    return label;
}

-(NSArray *)nameOfMonths
{    
    NSDateFormatter *dateFormatter = [NSDateFormatter new];
    return [dateFormatter standaloneMonthSymbols];
}

-(NSArray *)nameOfYears
{
    NSMutableArray *years = [NSMutableArray array];

    for(NSInteger year = minYear; year <= maxYear; year++) 
    {
        NSString *yearStr = [NSString stringWithFormat:@"%i", year];
        [years addObject:yearStr];
    }
    return years;
}

-(void)selectToday
{
    [self selectRow: self.todayIndexPath.row
        inComponent: MONTH
           animated: NO];

    [self selectRow: self.todayIndexPath.section
        inComponent: YEAR
           animated: NO];
}

-(NSIndexPath *)todayPath // row - month ; section - year
{
    CGFloat row = 0.f;
    CGFloat section = 0.f;

    NSString *month = [self currentMonthName];
    NSString *year  = [self currentYearName];

    //set table on the middle
    for(NSString *cellMonth in self.months) 
    {
        if([cellMonth isEqualToString:month]) 
        {
            row = [self.months indexOfObject:cellMonth];
            row = row + [self bigRowMonthCount] / 2;
            break;
        }
    }

    for(NSString *cellYear in self.years) 
    {
        if([cellYear isEqualToString:year]) 
        {
            section = [self.years indexOfObject:cellYear];
            section = section + [self bigRowYearCount] / 2;
            break;
        }
    }

    return [NSIndexPath indexPathForRow:row inSection:section];
}

-(NSString *)currentMonthName
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MMMM"];
    return [formatter stringFromDate:[NSDate date]];
}

-(NSString *)currentYearName
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy"];
    return [formatter stringFromDate:[NSDate date]];
}

@end

Answer 2

是的，你可能只想制作自己的选择器。但是，您不必将它或其他任何子类化;只需使用通用UIPickerView并从UIPickerViewDelegate / UIPickerViewDataSource方法中返回适当的值。

Answer 3

否，使用库存UIDatePicker无法完成此操作。

UIDatePickerModeDate

日期选择器显示月，日   这个月和几年。这些的确切顺序   项目取决于区域设置。   这种模式的一个例子是[11月   | 15 | 2007]。

来源：UIDatePicker class reference

我建议自定义UIPickerView以使用两个组件，并使用从NSDateFormatter检索到的月份和年份符号填充其行。

Answer 4

我在Swift中重写了Igor的回答：

class CLIVEDatePickerView: UIPickerView  {

    enum Component: Int {
        case Month = 0
        case Year = 1
    }

    let LABEL_TAG = 43
    let bigRowCount = 1000
    let numberOfComponentsRequired = 2

    let months = ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"]
    var years: [String] {
        get {
            var years: [String] = [String]()

            for i in minYear...maxYear {
                years.append("\(i)")
            }

            return years;
        }
    }

    var bigRowMonthsCount: Int {
        get {
            return bigRowCount * months.count
        }
    }

    var bigRowYearsCount: Int {
        get {
            return bigRowCount * years.count
        }
    }

    var monthSelectedTextColor: UIColor?
    var monthTextColor: UIColor?
    var yearSelectedTextColor: UIColor?
    var yearTextColor: UIColor?
    var monthSelectedFont: UIFont?
    var monthFont: UIFont?
    var yearSelectedFont: UIFont?
    var yearFont: UIFont?

    let rowHeight: NSInteger = 44

    /**
     Will be returned in user's current TimeZone settings
    **/
    var date: NSDate {
        get {
            let month = self.months[selectedRowInComponent(Component.Month.rawValue) % months.count]
            let year = self.years[selectedRowInComponent(Component.Year.rawValue) % years.count]
            let formatter = NSDateFormatter()
            formatter.dateFormat = "MM yyyy"
            return formatter.dateFromString("\(month) \(year)")!
        }
    }

    var minYear: Int!
    var maxYear: Int!

    override init(frame: CGRect) {
        super.init(frame: frame)
        loadDefaultParameters()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadDefaultParameters()
    }
    override func awakeFromNib() {
        super.awakeFromNib()
        loadDefaultParameters()
    }

    func loadDefaultParameters() {
        minYear = NSCalendar.currentCalendar().components(NSCalendarUnit.Year, fromDate: NSDate()).year
        maxYear = minYear! + 10

        self.delegate = self
        self.dataSource = self

        monthSelectedTextColor = UIColor.blueColor()
        monthTextColor = UIColor.blackColor()

        yearSelectedTextColor = UIColor.blueColor()
        yearTextColor = UIColor.blackColor()

        monthSelectedFont = UIFont.boldSystemFontOfSize(17)
        monthFont = UIFont.boldSystemFontOfSize(17)

        yearSelectedFont = UIFont.boldSystemFontOfSize(17)
        yearFont = UIFont.boldSystemFontOfSize(17)
    }


    func setup(minYear: NSInteger, andMaxYear maxYear: NSInteger) {
        self.minYear = minYear

        if maxYear > minYear {
            self.maxYear = maxYear
        } else {
            self.maxYear = minYear + 10
        }
    }

    func selectToday() {
        selectRow(todayIndexPath.row, inComponent: Component.Month.rawValue, animated: false)
        selectRow(todayIndexPath.section, inComponent: Component.Year.rawValue, animated: false)
    }


    var todayIndexPath: NSIndexPath {
        get {
            var row = 0.0
            var section = 0.0

            for cellMonth in months {
                if cellMonth == currentMonthName {
                    row = Double(months.indexOf(cellMonth)!)
                    row = row + Double(bigRowMonthsCount / 2)
                    break
                }
            }

            for cellYear in years {
                if cellYear == currentYearName {
                    section = Double(years.indexOf(cellYear)!)
                    section = section + Double(bigRowYearsCount / 2)
                    break
                }
            }

            return NSIndexPath(forRow: Int(row), inSection: Int(section))
        }
    }

    var currentMonthName: String {
        get {
            let formatter = NSDateFormatter()
            let locale = NSLocale(localeIdentifier: "en_US")
            formatter.locale = locale
            formatter.dateFormat = "MM"
            return formatter.stringFromDate(NSDate())
        }
    }

    var currentYearName: String {
        get {
            let formatter = NSDateFormatter()
            formatter.dateFormat = "yyyy"
            return formatter.stringFromDate(NSDate())
        }
    }


    func selectedColorForComponent(component: NSInteger) -> UIColor {
        if component == Component.Month.rawValue {
            return monthSelectedTextColor!
        }
        return yearSelectedTextColor!
    }

    func colorForComponent(component: NSInteger) -> UIColor {
        if component == Component.Month.rawValue {
            return monthTextColor!
        }
        return yearTextColor!
    }


    func selectedFontForComponent(component: NSInteger) -> UIFont {
        if component == Component.Month.rawValue {
            return monthSelectedFont!
        }
        return yearSelectedFont!
    }

    func fontForComponent(component: NSInteger) -> UIFont {
        if component == Component.Month.rawValue {
            return monthFont!
        }
        return yearFont!
    }



    func titleForRow(row: Int, forComponent component: Int) -> String? {
        if component == Component.Month.rawValue {
            return self.months[row % self.months.count]
        }
        return self.years[row % self.years.count]
    }


    func labelForComponent(component: NSInteger) -> UILabel {
        let frame = CGRect(x: 0.0, y: 0.0, width: bounds.size.width, height: CGFloat(rowHeight))
        let label = UILabel(frame: frame)
        label.textAlignment = NSTextAlignment.Center
        label.backgroundColor = UIColor.clearColor()
        label.userInteractionEnabled = false
        label.tag = LABEL_TAG
        return label
    }
}

extension CLIVEDatePickerView: UIPickerViewDelegate, UIPickerViewDataSource {

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return numberOfComponentsRequired
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if(component == Component.Month.rawValue) {
            return bigRowMonthsCount
        } else {
            return bigRowYearsCount
        }
    }



    func pickerView(pickerView: UIPickerView, widthForComponent component: Int) -> CGFloat {
        return self.bounds.size.width / CGFloat(numberOfComponentsRequired)
    }

    func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
        var selected = false

        if component == Component.Month.rawValue {
            let monthName = self.months[(row % self.months.count)]
            if monthName == currentMonthName {
                selected = true
            }
        } else {
            let yearName = self.years[(row % self.years.count)]
            if yearName == currentYearName {
                selected = true
            }
        }

        var returnView: UILabel
        if view?.tag == LABEL_TAG {
            returnView = view as! UILabel
        } else {
            returnView = labelForComponent(component)
        }

        returnView.font = selected ? selectedFontForComponent(component) : fontForComponent(component)
        returnView.textColor = selected ? selectedColorForComponent(component) : colorForComponent(component)

        returnView.text = titleForRow(row, forComponent: component)

        return returnView
    }


    func pickerView(pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return CGFloat(rowHeight)
    }

}

Answer 5

我有一个懒惰的解决方法 - 我做了一个10x10的黑色png。然后我将其用作具有scaletofill imageview的掩码，其大小完全覆盖日期列。我将alpha设置为0.75，几乎没有显示该列。对用户来说很清楚，看起来还不错。

Answer 6

我只是将当天的第一天重置为价值变动事件发生的月份。因此，当用户选择一天时，它会滚动回到第一天。我使用以下选择开始日期（月和年）。

-(void) resetDay {

 NSDate *currentDate  = [startDatePicker date];
 NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];
 NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit| NSMonthCalendarUnit) fromDate:currentDate];
 NSInteger yearNum = [ componentsYear year];
 NSInteger monthNum = [componentsYear month];
 NSLog(@"Month %d, Year %d", monthNum, yearNum);

 NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
 [componentStartDate setDay:1];
 [componentStartDate setMonth:monthNum];
 [componentStartDate setYear:yearNum];
 NSDate *startDate = [gregorian dateFromComponents:componentStartDate];

 [startDatePicker setDate:startDate animated:YES];
 [componentStartDate release];
 [gregorian release];
}

如果选择结束日期（月份和年份），它会稍微长一些，因为我想将当天设置为所选月份的第31天或第30天。

-(NSInteger) findDaysInYear {
    NSDate *currentDate = [NSDate date];
    NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];


    NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit)   fromDate:currentDate];
    NSInteger yearNum = [ componentsYear year];

    NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
    [componentStartDate setDay:1];
    [componentStartDate setMonth:1];
    [componentStartDate setYear:yearNum];
    NSDate *startDate = [gregorian dateFromComponents:componentStartDate];
    NSLog(@"Start date set to %@", startDate);

    NSDateComponents *componentEndDate = [[NSDateComponents alloc] init];
    [componentEndDate setDay:31];
    [componentEndDate setMonth:12];
    [componentEndDate setYear:yearNum];

    NSDate *endDate = [gregorian dateFromComponents:componentEndDate];
    NSLog(@"End date set to %@", endDate);

    NSUInteger unitFlags = NSDayCalendarUnit ;
    NSDateComponents *componentsDay = [gregorian components:unitFlags   fromDate:startDate    toDate:endDate options:0];
    NSInteger days = [componentsDay day] +1;
    NSLog(@"Number of days in the year:%d, is %d", yearNum,days);
    [componentEndDate release];
    [componentStartDate release];
    [gregorian release];
    if (days != 365 && days != 366) {
        return 366;
    }
    return days;
}
-(NSInteger) findDaysInMonth:(NSInteger) monthNum {

    NSInteger days = 30;


    switch (monthNum) {
        case 1:
            days = 31;
            break;
        case 2:
            if([self findDaysInYear] == 366)        days = 29;
            else days = 28;
            break;
        case 3:
            days = 31;
            break;
        case 4:
            days = 30;
            break;
        case 5:
            days = 31;
            break;
        case 6:
            days = 30;
            break;
        case 7:
            days = 31;
            break;
        case 8:
            days = 31;
            break;
        case 9:
            days = 30;
            break;
        case 10:
            days = 31;
            break;
        case 11:
            days = 30;
            break;
        case 12:
            days = 31;
            break;
        default:
            break;
    }
    return days;

}

-(void) resetDay {

    NSDate *currentDate  = [endDatePicker date];
    NSCalendar *gregorian = [[NSCalendar alloc]  initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *componentsYear = [gregorian components:(NSYearCalendarUnit| NSMonthCalendarUnit)  fromDate:currentDate];
    NSInteger yearNum = [ componentsYear year];
    NSInteger monthNum = [componentsYear month];

    NSDateComponents *componentStartDate = [[NSDateComponents alloc] init];
    [componentStartDate setDay:[self findDaysInMonth:monthNum]];
    [componentStartDate setMonth:monthNum];
    [componentStartDate setYear:yearNum];
    NSDate *startDate = [gregorian dateFromComponents:componentStartDate];

    [endDatePicker setDate:startDate animated:YES];
    [componentStartDate release];
    [gregorian release];
}

Answer 7

我正在使用一个简单的UIPickerView，包含2个组件（月和年）。

每次选择行调用UIPickerViewDelegate：

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    //Today year and month
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"yyyy"];
    int year = [[dateFormat stringFromDate:[NSDate date]] intValue];
    [dateFormat setDateFormat:@"MM"];
    int month = [[dateFormat stringFromDate:[NSDate date]] intValue] - 1;

    //picker year and month
    int selectedYear = [[self.yearsArray objectAtIndex:[pickerView selectedRowInComponent:1]] intValue];
    int selectedMonth = [pickerView selectedRowInComponent:0];

    // if month in the past, change the month
    if (year == selectedYear && selectedMonth < month)
    {
        [pickerView selectRow:month inComponent:0 animated:YES];
    }
}

Answer 8

您可以使用UICustomDatePicker仅显示月份和年份选项

https://github.com/Anandsan/UICustomDatePicker

@interface ViewController ()

@property (nonatomic, weak) IBOutlet UICustomDatePicker *customDatePicker;

@end

-(void) viewDidLoad {

 [super viewDidLoad];

 self.customDatePicker.option = NSCustomDatePickerOptionLongMonth | NSCustomDatePickerOptionYear;

 self.customDatePicker.order = NSCustomDatePickerOrderMonthDayAndYear;

}

 -(IBAction)didCustomDatePickerValueChanged:(id)sender {

    NSLog(@"%@",[(UICustomDatePicker *)sender currentDate]);

}

Refer the Screen

Answer 9

您可以使用名为

的开源库

AKMonthYearPickerView

import AKMonthYearPickerView

AKMonthYearPickerView.sharedInstance.show(vc: viewController, doneHandler: doneHandler, completetionalHandler: completetionalHandler)

https://github.com/ali-cs/AKMonthYearPickerView

要使用Pod安装它，

pod 'AKMonthYearPickerView'

自定义前几年的限制和条形颜色

AKMonthYearPickerView.sharedInstance.barTintColor =   UIColor.blue

AKMonthYearPickerView.sharedInstance.previousYear = 4

Answer 10

在Swift 4中重写了answer中的RossP：

import Foundation

@objc class ShortDatePickerView: UIPickerView  {

    enum Component: Int {
        case Month = 0
        case Year = 1
    }

    let LABEL_TAG = 43
    let bigRowCount = 1000
    let numberOfComponentsRequired = 2

    let months = ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"]
    var years: [String] {
        get {
            var years: [String] = [String]()

            for i in minYear...maxYear {
                years.append("\(i)")
            }

            return years;
        }
    }

    var bigRowMonthsCount: Int {
        get {
            return bigRowCount * months.count
        }
    }

    var bigRowYearsCount: Int {
        get {
            return bigRowCount * years.count
        }
    }

    var monthSelectedTextColor: UIColor?
    var monthTextColor: UIColor?
    var yearSelectedTextColor: UIColor?
    var yearTextColor: UIColor?
    var monthSelectedFont: UIFont?
    var monthFont: UIFont?
    var yearSelectedFont: UIFont?
    var yearFont: UIFont?

    let rowHeight: NSInteger = 44

    /**
     Will be returned in user's current TimeZone settings
    **/
    var date: Date {
        get {
            let month = self.months[selectedRow(inComponent: Component.Month.rawValue) % months.count]
            let year = self.years[selectedRow(inComponent: Component.Year.rawValue) % years.count]
            let formatter = DateFormatter()
            formatter.dateFormat = "MM yyyy"
            return formatter.date(from: "\(month) \(year)")!
        }
    }

    var minYear: Int!
    var maxYear: Int!

    override init(frame: CGRect) {
        super.init(frame: frame)
        loadDefaultParameters()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadDefaultParameters()
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        loadDefaultParameters()
    }

    func loadDefaultParameters() {
        minYear = Calendar.current.dateComponents([.year], from: Date()).year
        maxYear = minYear! + 10

        self.delegate = self
        self.dataSource = self

        monthSelectedTextColor = .blue
        monthTextColor = .black

        yearSelectedTextColor = .blue
        yearTextColor = .black

        monthSelectedFont = .boldSystemFont(ofSize: 17)
        monthFont = .boldSystemFont(ofSize: 17)

        yearSelectedFont = .boldSystemFont(ofSize: 17)
        yearFont = .boldSystemFont(ofSize: 17)
    }


    func setup(minYear: NSInteger, andMaxYear maxYear: NSInteger) {
        self.minYear = minYear

        if maxYear > minYear {
            self.maxYear = maxYear
        } else {
            self.maxYear = minYear + 10
        }
    }

    func selectToday() {
        selectRow(todayIndexPath.row, inComponent: Component.Month.rawValue, animated: false)
        selectRow(todayIndexPath.section, inComponent: Component.Year.rawValue, animated: false)
    }


    var todayIndexPath: NSIndexPath {
        get {
            var row = 0.0
            var section = 0.0

            for cellMonth in months {
                if cellMonth == currentMonthName {
                    row = Double(months.index(of: cellMonth)!)
                    row = row + Double(bigRowMonthsCount / 2)
                    break
                }
            }

            for cellYear in years {
                if cellYear == currentYearName {
                    section = Double(years.index(of: cellYear)!)
                    section = section + Double(bigRowYearsCount / 2)
                    break
                }
            }

            return NSIndexPath(row: Int(row), section: Int(section))
        }
    }

    var currentMonthName: String {
        get {
            let formatter = DateFormatter()
            let locale = Locale.init(identifier: "en_US")
            formatter.locale = locale
            formatter.dateFormat = "MM"
            return formatter.string(from: Date())
        }
    }

    var currentYearName: String {
        get {
            let formatter = DateFormatter()
            formatter.dateFormat = "yyyy"
            return formatter.string(from: Date())
        }
    }


    func selectedColorForComponent(component: NSInteger) -> UIColor {
        if component == Component.Month.rawValue {
            return monthSelectedTextColor!
        }
        return yearSelectedTextColor!
    }

    func colorForComponent(component: NSInteger) -> UIColor {
        if component == Component.Month.rawValue {
            return monthTextColor!
        }
        return yearTextColor!
    }


    func selectedFontForComponent(component: NSInteger) -> UIFont {
        if component == Component.Month.rawValue {
            return monthSelectedFont!
        }
        return yearSelectedFont!
    }

    func fontForComponent(component: NSInteger) -> UIFont {
        if component == Component.Month.rawValue {
            return monthFont!
        }
        return yearFont!
    }


    func titleForRow(row: Int, forComponent component: Int) -> String? {
        if component == Component.Month.rawValue {
            return self.months[row % self.months.count]
        }
        return self.years[row % self.years.count]
    }


    func labelForComponent(component: NSInteger) -> UILabel {
        let frame = CGRect(x: 0.0, y: 0.0, width: bounds.size.width, height: CGFloat(rowHeight))
        let label = UILabel(frame: frame)
        label.textAlignment = .center
        label.backgroundColor = .clear
        label.isUserInteractionEnabled = false
        label.tag = LABEL_TAG
        return label
    }
}

extension ShortDatePickerView: UIPickerViewDelegate, UIPickerViewDataSource {

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return numberOfComponentsRequired
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if (component == Component.Month.rawValue) {
            return bigRowMonthsCount
        } else {
            return bigRowYearsCount
        }
    }

    func pickerView(_ pickerView: UIPickerView, widthForComponent component: Int) -> CGFloat {
        return self.bounds.size.width / CGFloat(numberOfComponentsRequired)
    }

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        var selected = false

        if component == Component.Month.rawValue {
            let monthName = self.months[(row % self.months.count)]
            if monthName == currentMonthName {
                selected = true
            }
        } else {
            let yearName = self.years[(row % self.years.count)]
            if yearName == currentYearName {
                selected = true
            }
        }

        var returnView: UILabel
        if view?.tag == LABEL_TAG {
            returnView = view as! UILabel
        } else {
            returnView = labelForComponent(component: component)
        }

        returnView.font = selected ? selectedFontForComponent(component: component) : fontForComponent(component: component)
        returnView.textColor = selected ? selectedColorForComponent(component: component) : colorForComponent(component: component)

        returnView.text = titleForRow(row: row, forComponent: component)

        return returnView
    }

    func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return CGFloat(rowHeight)
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 2
    }
}

Answer 11

您可以非常轻松地隐藏日期栏：

datePicker.subviews[0].subviews[0].subviews[1].hidden = true

享受：）

UIDatePicker选择Month和Year

11 个答案: