我试图在一个ViewController中一起使用两个以上的UIPickerViews。每个UIPickerView都有不同的数据数组。我正在使用界面构建器来链接拾取器。我想要的是，点击按钮后，我的PickerView将显示，用户可以从中选择数据。所选数据将出现在文本字段中。它适用于第一个PickerView，但当我点击第二个PickerView时，该值来自第一个数组，我无法写入条件。这是我的所有代码：
.h文件
#import <UIKit/UIKit.h>
@interface Tabbar2ViewController : UIViewController<UITextViewDelegate,UITextFieldDelegate,UIPickerViewDataSource,UIPickerViewDelegate>{
IBOutlet UIPickerView *genderPickerView;
IBOutlet UIPickerView *pickerViewoption;
IBOutlet UIButton *BrandPickerBtn;
IBOutlet UIButton *genderPickerfBtn;
NSArray *brands;
NSArray *gender;
BOOL isCheckedpickerView;
IBOutlet UILabel *BrandLabelfield;
IBOutlet UILabel *GenderLabelfield;
}
- (IBAction)action:(id)sender;
- (IBAction)genderAction:(id)sender;
@property(nonatomic,retain)NSArray *brands;
@property(nonatomic,retain)NSArray *gender;
@end
.m文件
#import "ttViewController.h"
@interface ttViewController ()
@end
@implementation ttViewController
@synthesize countries,size,brands,gender,activity,condition,color;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
isCheckedpickerView=FALSE;
pickerViewoption.hidden=YES;
genderPickerView.hidden=YES;
activityPickerView.hidden=YES;
conditionPickerView.hidden=YES;
sizeandquantityPickerView.hidden=YES;
BrandLabelfield = [[UILabel alloc] initWithFrame:CGRectMake(20, 812, 253, 35)];
BrandLabelfield.textColor = [UIColor lightGrayColor];
BrandLabelfield.text=@"Brand";
BrandLabelfield.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"header_01.png"]];
BrandLabelfield.font = [UIFont fontWithName:@"Open Sans" size:14];
[tabView1 addSubview:BrandLabelfield];
//GenderTextfield with Label //
GenderLabelfield = [[UILabel alloc] initWithFrame:CGRectMake(20, 865, 253, 35)];
GenderLabelfield.textColor = [UIColor lightGrayColor];
GenderLabelfield.text=@"Gender";
GenderLabelfield.font = [UIFont fontWithName:@"Open Sans" size:14];
[tabView1 addSubview:GenderLabelfield];
//ColorTextfield with Label //
ConditionLabelfield = [[UILabel alloc] initWithFrame:CGRectMake(20, 1113, 253, 35)];
ConditionLabelfield.textColor = [UIColor lightGrayColor];
ConditionLabelfield.text=@"Color";
ConditionLabelfield.font = [UIFont fontWithName:@"Open Sans" size:14];
[tabView1 addSubview:ConditionLabelfield];
brands=[[NSArray alloc]initWithObjects:@"Nike",@"Bata",@"Adidas", nil];
gender=[[NSArray alloc]initWithObjects:@"Male",@"Female",@"Unisex", nil];
activity=[[NSArray alloc]initWithObjects:@"BASEBALL",@"BASKETBALL",@"FOOTBALL",@"GOLF",@"RUNNING",@"SKATING",@"SOCCER",@"SPORTS & OUTDOOR",@"TENNIS",@"TRAINING",@"VOLLEY BALL",@"WRESTLING", nil];
// Custom PICKER VIEWS //
pickerViewoption=[[UIPickerView alloc]initWithFrame:CGRectMake(13, 852, 290, 41)];
pickerViewoption.showsSelectionIndicator = YES;
pickerViewoption.delegate = self;
pickerViewoption.dataSource=self;
pickerViewoption.hidden=YES;
[pickerViewoption setBackgroundColor:[UIColor lightGrayColor]];
[tabView1 addSubview:pickerViewoption];
genderPickerView=[[UIPickerView alloc]initWithFrame:CGRectMake(13, 906, 290, 41)];
genderPickerView.showsSelectionIndicator = YES;
genderPickerView.delegate = self;
genderPickerView.dataSource=self;
genderPickerView.hidden=YES;
[genderPickerView setBackgroundColor:[UIColor lightGrayColor]];
[tabView1 addSubview:genderPickerView];
activityPickerView=[[UIPickerView alloc]initWithFrame:CGRectMake(13, 954, 290, 41)];
activityPickerView.showsSelectionIndicator = YES;
activityPickerView.delegate = self;
activityPickerView.dataSource=self;
activityPickerView.hidden=YES;
[activityPickerView setBackgroundColor:[UIColor lightGrayColor]];
[tabView1 addSubview:activityPickerView];
pickerViewoption.tag=1;
genderPickerView.tag=2;
activityPickerView.tag=3;
BrandPickerBtn.tag=000;
genderPickerfBtn.tag=111;
activityPickerBtn.tag=222;
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row
forComponent:(NSInteger)component{
NSString *string;
if (pickerViewoption.tag==1) {
[tabView1 addSubview:pickerViewoption];
string=[self.brands objectAtIndex:row];
}
else {
[tabView1 addSubview:genderPickerView];
string=[self.gender objectAtIndex:row];
}
else if (genderPickerView.tag==2){
[tabView1 addSubview:genderPickerView];
string=[self.gender objectAtIndex:row];
}
else if (activityPickerView.tag==3){
[tabView1 addSubview:activityPickerView];
string=[self.activity objectAtIndex:row];
}
return string;
}
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component {
if (pickerViewoption.tag==1){
BrandLabelfield.text=@"";
BrandLabelfield.text=[brands objectAtIndex:row];
BrandLabelfield.textColor=[UIColor whiteColor];
pickerViewoption.hidden=YES;
}
else if (genderPickerView.tag==2){
GenderLabelfield.text=@"";
GenderLabelfield.text=[gender objectAtIndex:row];
GenderLabelfield.textColor=[UIColor whiteColor];}
else if (activityPickerView.tag==3){
ActivityLabelfield.text=@"";
ActivityLabelfield.text=[activity objectAtIndex:row];
ActivityLabelfield.textColor=[UIColor whiteColor];
}
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component{
if (pickerViewoption.tag==1)
{
return [brands count];
}
else if (genderPickerView.tag==2)
{
return [gender count];
}
else if (activityPickerView.tag==3)
{
return [activity count];
}
return 0;
}
- (IBAction)action:(id)sender; {
if (isCheckedpickerView==FALSE)
{
pickerViewoption.hidden=NO;
isCheckedpickerView=TRUE;
}
else
{
isCheckedpickerView=FALSE;
pickerViewoption.hidden=YES;
}
}
- (IBAction)genderAction:(id)sender {
if (isCheckedpickerView==FALSE)
{
genderPickerView.hidden=NO;
isCheckedpickerView=TRUE;
}
else
{
isCheckedpickerView=FALSE;
genderPickerView.hidden=YES;
}
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
答案 0 :(得分：5)
目前您正在检查委托方法中的错误条件，请在.m文件中替换以下3种方法 ：
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row
forComponent:(NSInteger)component{
NSString *string;
if (pickerView.tag==1) {
[tabView1 addSubview:pickerViewoption];
string=[self.brands objectAtIndex:row];
}
else if (pickerView.tag==2){
[tabView1 addSubview:genderPickerView];
string=[self.gender objectAtIndex:row];
}
else if (pickerView.tag==3){
[tabView1 addSubview:activityPickerView];
string=[self.activity objectAtIndex:row];
}
else {
[tabView1 addSubview:genderPickerView];
string=[self.gender objectAtIndex:row];
}
return string;
}
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component {
if (thePickerView.tag==1){
BrandLabelfield.text=@"";
BrandLabelfield.text=[brands objectAtIndex:row];
BrandLabelfield.textColor=[UIColor whiteColor];
pickerViewoption.hidden=YES;
}
else if (thePickerView.tag==2){
GenderLabelfield.text=@"";
GenderLabelfield.text=[gender objectAtIndex:row];
GenderLabelfield.textColor=[UIColor whiteColor];
}
else if (thePickerView.tag==3){
ActivityLabelfield.text=@"";
ActivityLabelfield.text=[activity objectAtIndex:row];
ActivityLabelfield.textColor=[UIColor whiteColor];
}
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component{
if (pickerView.tag==1)
{
return [brands count];
}
else if (pickerView.tag==2)
{
return [gender count];
}
else if (pickerView.tag==3)
{
return [activity count];
}
return 0;
}