iPhone 按下按钮时出现错误

Question

按下按钮时，我收到下面显示的错误消息。我的“buttonPressed”方法中还没有任何代码，尽管我认为这与它没有任何关系？

错误消息:“抛出“NSException”实例后调用终止程序收到信号:“SIGABRT”。

UIButton * myButton = [UIButton buttonWithType:UIButtonTypeCustom];

[myButton setImage:[UIImage imageNamed:@"ButtonStandard.png"] forState:UIControlStateNormal]; [myButton setImage:[UIImage imageNamed:@"ButtonSelected.png"] forState:UIControlStateSelected]; [myButton setShowsTouchWhenHighlighted:YES];

myButton.frame = CGRectMake(0.0, 380.0, 320.0, 100.0);
[myButton addTarget:self action:@selector(buttonPressed) forControlEvents:UIControlEventTouchUpInside];
[contentView addSubview:myButton];

任何帮助都会很棒。

Answer 1

将@selector(buttonPressed)更改为@selector(buttonPressed:)(注意末尾的冒号)并将方法本身更改为:

-(void)buttonPressed:(id)sender {
    /* sender will be the UIButton. */
}