Question

在视图中，我使用标签作为按钮的主机。标签已添加到self.view。两个对象都按预期显示，但不触发按钮中定义的操作。这是代码：

datelabel = [[UILabel alloc] init];
datelabel.frame = CGRectMake(10, 200, 300, 40);
datelabel.backgroundColor = [UIColor whiteColor];
datelabel.textColor = [UIColor blueColor];
datelabel.font = [UIFont fontWithName:@"Verdana" size: 18.0];

NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.dateStyle = NSDateFormatterMediumStyle;
datelabel.text = [NSString stringWithFormat:@"%@",
[df stringFromDate:[NSDate date]]];

CGRect buttonFrame = CGRectMake( 170, 8, 130, 25 );
UIButton *button = [[UIButton alloc] initWithFrame: buttonFrame];     
[button setTitle: @"My Button" forState: UIControlStateNormal];
[button addTarget:self action:@selector(salvarFecha:) forControlEvents:
    UIControlEventTouchUpInside];
[button setTitleColor: [UIColor redColor] forState: UIControlStateNormal];

[datelabel addSubview:button];

[self.view addSubview:datelabel];

这里是按钮动作代码：

- (void)salvarFecha: (id) sender{
    NSLog(@"BOTON PULSADO");
}

欢迎任何帮助......

Answer 1

我从来没有听说过有人添加UIButton作为UILabel的子视图。为什么不像使用datelabel一样将它添加到self.view中？

Answer 2

在我看来，您需要将userInteractionEnabled设置为YES

来自UIView.h：

if set to NO, user events (touch, keys) are ignored and removed from the event queue.

在UILabel.h中，此字段默认为NO

希望这会对你有所帮助

按钮操作不在视图上的按钮上工作

2 个答案: