ios - UITextField 触摸事件在 UIScrollView 中不起作用

Question

我有一个 UITextField，当 UITextField 是 UIScrollView 的 subview 时，其中文本字段操作不起作用。

除此之外，一切正常， 这是我的代码..请帮忙？

我正在使用这段代码，因为我需要在单击 alertview 按钮后立即触发 UIDatePicker。

- (void)viewDidLoad {
[super viewDidLoad];


UIScrollView *scroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];

[self.view addSubview:scroll];

date = [[UITextField alloc]initWithFrame:CGRectMake(80, 150, 150, 50)];
date.placeholder = @"Date";
date.delegate = self;
[date addTarget:self action:@selector(dateClicked:) forControlEvents:UIControlEventTouchDown];
[scroll addSubview:date];
 }

  - (void)dateClicked:(id)sender
    {
    NSLog(@"CLICKED");
     UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"Choose Date Format" message:nil delegate:self cancelButtonTitle:@"dd/MM/YYYY" otherButtonTitles:@"MM/dd/YYYY", nil];
     [alertView show];
      }

Answer 1

您将 UIButton 设置为与 UITextField 相同的框架并设置 UIButton UIControlEventTouchUpInside 事件并更新 UITextField 值。

- (void)viewDidLoad {
    [super viewDidLoad];
UIScrollView *scroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];

    [self.view addSubview:scroll];

    date = [[UITextField alloc]initWithFrame:CGRectMake(80, 150, 150, 50)];
    date.placeholder = @"Date";
    UIButton *btn=[[UIButton alloc]initWithFrame:CGRectMake(80, 150, 150, 50)];
    [btn addTarget:self action:@selector(dateClicked:) forControlEvents:UIControlEventTouchUpInside];
    [scroll addSubview:date];
    [scroll addSubview:btn];
}
- (void)dateClicked:(id)sender
{
    NSLog(@"CLICKED");
    UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"Choose Date Format" message:nil delegate:self cancelButtonTitle:@"dd/MM/YYYY" otherButtonTitles:@"MM/dd/YYYY", nil];
    [alertView show];
}