点击UIPickerView时不要忽略

Question

我有一个UIPickerView，我有一个男性和女性选项。

当我点击标签时，会显示UIPickerView，并根据UIPickerView中的选择，标签上会显示相同的文字。

一切运行良好，但点击UIPickerView无法正常工作。

当我点按UIPickerView时，

1. 对于iOS6，UIPickerView被解雇。

2. 对于iOS7，UIPickerView不会被解雇。

所以我想做的是点击它时不要忽略UIPickerView。

知道如何为iOS 6做到这一点吗？

Dropbox link

代码

·H

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIPickerViewDelegate, UIPickerViewDataSource>
@property (retain, nonatomic) IBOutlet UIPickerView *myPicker;
@property (retain, nonatomic) IBOutlet UILabel *myLabel;
@property (retain, nonatomic) IBOutlet NSMutableArray *arrayGender;
@end

的.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize myPicker, myLabel, arrayGender;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    arrayGender = [[NSMutableArray alloc] init];
    [arrayGender addObject:@"Male"];
    [arrayGender addObject:@"Female"];

    myLabel.text = @"Choose gender...";

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideAllKeyboards)];
    tapGesture.cancelsTouchesInView = NO;
    [self.view addGestureRecognizer:tapGesture];

    myLabel.userInteractionEnabled = YES;
    UITapGestureRecognizer *tapGestureRecognizergenderLabel = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(genderLabelTapped)];
    tapGestureRecognizergenderLabel.numberOfTapsRequired = 1;
    [myLabel addGestureRecognizer:tapGestureRecognizergenderLabel];
    [tapGestureRecognizergenderLabel release];

    myPicker.hidden = NO;
}

-(void) genderLabelTapped {
    NSLog(@"genderLabelTapped");
    [myPicker reloadAllComponents];
    myPicker.hidden = NO;
}

-(IBAction)hideAllKeyboards {
    NSLog(@"hideAllKeyboards");
    myPicker.hidden = YES;
}

- (void)viewWillAppear:(BOOL)animated
{
    NSLog(@"viewWillAppear");
    [super viewWillAppear:animated];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void) dealloc {
    [myPicker release];
    [myLabel release];
    [super dealloc];
}

- (IBAction)takeMeBack:(id)sender {
    [self.navigationController popViewControllerAnimated:YES];
}

#pragma mark -
#pragma mark PickerView DataSource

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    NSLog(@"custom data..");
    if (IS_DEVICE_RUNNING_IOS_7_AND_ABOVE()) {
        //        NSLog(@"changing font...");
        UILabel *label;
        //        = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 233, 44)]; // your frame, so picker gets "colored"

            label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 233, 44)];


        label.textColor = [UIColor whiteColor];
        label.font = [UIFont fontWithName:@"Trebuchet MS" size:14];

        label.textAlignment = NSTextAlignmentCenter;

        label.text = [arrayGender objectAtIndex:row];

        return label;
    } else {
        //        NSLog(@"changing font...");
        UILabel *label;
        //        = [[UILabel alloc] initWithFrame:CGRectMake(40, 0, 193, 44)];
            label = [[UILabel alloc] initWithFrame:CGRectMake(40, 0, 193, 44)];

        label.backgroundColor = [UIColor clearColor];
        label.textColor = [UIColor blackColor];
        label.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:18];

            label.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:14];

        label.text = [arrayGender objectAtIndex:row];

        return label;
    }
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return [arrayGender count];
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [arrayGender objectAtIndex:row];
}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
      inComponent:(NSInteger)component
{
    myLabel.text = [NSString stringWithFormat:@"%@", [arrayGender objectAtIndex:row]];
    myPicker.accessibilityValue = [NSString stringWithFormat:@"%@", [arrayGender objectAtIndex:row]];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (BOOL)shouldAutorotate
{
    return NO;
}

@end

我知道因为手势识别器，选择器被隐藏在iOS6中。问题是为什么它不会被隐藏在iOS7中？

Answer 1

如果你只是从某个地方复制粘贴它并且你不知道它做了什么，你自己写了这个吗？所以你来到Stack Overflow，接近于零的研究完成了吗？通过接近于零的研究，我的意思是你甚至没有读过代码......

您认为这些线条有什么作用？

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideAllKeyboards)];
tapGesture.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:tapGesture];

-(IBAction)hideAllKeyboards {
     NSLog(@"hideAllKeyboards");
     myPicker.hidden = YES;
}

事实证明，当iOS7中的触摸发生时（在挑选者视图上），捕获水龙头的视图属于类UIPickerTableViewWrapperCell，而在iOS6中，它是类UIPickerTableView（如果没有点击一行）或UITableViewCellContentView（当点击一行时）。我的猜测是，后两个让水龙头通过，好像在他们的超级视图上发生了敲击（在你的情况下，self.view）。 ＆lt; - 最后一句话只是猜测，不确定。

你可以确保只有在self.view上点击发生时才会隐藏选择器的方法是将委托自己设置为tapGesture的委托，然后实现gestureRecognizer：shouldReceiveTouch方法：

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if (touch.view == self.view) {
        return YES;
    } else {
        return NO;
    }
}