将文本字段输入更改为 UIDatePicker 中选择的日期（更改值时）

Question

正如您从我的问题中可以理解的那样，我无法获取 UITextField（其中 2 个有一个 inputView 作为 UIDatePicker，1 个是正常的）将文本更改为在 UIDatePicker（一个 XIB 文件）中选择的日期。 到目前为止，我设法在点击文本字段时显示 datePicker（并在点击视图时将其删除，但我无法让 textField 将其文本更改为选择的 UIDatePicker 日期。 这是我的 .m 文件：

#import "ViewController.h"
#define kNIBname @"MyDatePickerView"


@interface ViewController ()<UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UITextField *myTF;
@property (weak, nonatomic) IBOutlet UITextField *myOtherTF;
@property (nonatomic, strong) UIView *myDatePickerView;
@property (nonatomic,strong) UIDatePicker *MyDatePicker;
@end

@implementation ViewController
@synthesize myTF,myOtherTF,MyDatePicker,myDatePickerView;
- (void)viewDidLoad{
[super viewDidLoad];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self                                     action:@selector(dropPicker:)];
[self.view addGestureRecognizer:tap];
[self datePickerValueChanged:MyDatePicker];
MyDatePicker = [[myDatePickerView subviews] lastObject];
[MyDatePicker setDatePickerMode: UIDatePickerModeDate];
[MyDatePicker addTarget:self action:@selector(datePickerValueChanged:) forControlEvents:UIControlEventValueChanged];
[myTF setInputView:myDatePickerView];
[myOtherTF setInputView:myDatePickerView];
// Do any additional setup after loading the view, typically from a nib.
}
-(IBAction)dropPicker:(id)sender{
[myDatePickerView removeFromSuperview];
[self.view endEditing:YES];
}
- (void) loadDatePickerView{
UINib *nib = [UINib nibWithNibName:kNIBname bundle:[NSBundle mainBundle]];
NSArray *views = [nib instantiateWithOwner:self options:nil];
self.myDatePickerView = [views firstObject];
[myDatePickerView setFrame:CGRectMake(0, 318, 320, 162)];
[self.view addSubview:myDatePickerView];
}


-(IBAction)datePickerValueChanged:(UIDatePicker *)sender{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:sender.locale];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
}
-(BOOL) textFieldShouldBeginEditing:(UITextField *)textField{
if(textField == myTF || textField == myOtherTF){
    [self loadDatePickerView];
    NSDateFormatter *df = [[NSDateFormatter alloc] init];
    [df setLocale:[MyDatePicker locale]];
    [df setDateStyle:NSDateFormatterMediumStyle];
    [self datePickerValueChanged:MyDatePicker];
    [textField setText:[df stringFromDate:[MyDatePicker date]]];
    return NO;
} else {
    return YES;
}
}

@end

Answer 1

如果我没看错，那么您设置日期的方法有误。 textFieldShouldBeginEditing 仅在开始编辑文本字段之前调用一次。您想要的是在您的 datePickerValueChanged 方法中设置 textField 文本，因为这是每次您选择日期时都会触发的文本。