将 UIButton 添加到 UITextField 导致发送无法识别的选择器

Question

我的错误是：

2011-03-12 20:48:33.861 SmarTrek[22040:207] -[RouteViewController selectFavorite]: unrecognized selector sent to instance 0x5b154a0
2011-03-12 20:48:33.863 SmarTrek[22040:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException'

代码是：

- (void)viewDidLoad
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:[UIImage imageNamed:@"add.png"] forState:UIControlStateNormal];
    [button setImage:[UIImage imageNamed:@"add.png"] forState:UIControlStateHighlighted];
    button.bounds = CGRectMake(0, 0, 0, 29);
    button.imageEdgeInsets = UIEdgeInsetsMake(0, -24, 0, 0);
    [button addTarget:self action:@selector(selectFavorite) forControlEvents:UIControlEventTouchUpInside];


    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
    [button1 setImage:[UIImage imageNamed:@"add.png"] forState:UIControlStateNormal];
    [button1 setImage:[UIImage imageNamed:@"add.png"] forState:UIControlStateHighlighted];
    button1.bounds = CGRectMake(0, 0, 0, 29);
    button1.imageEdgeInsets = UIEdgeInsetsMake(0, -24, 0, 0);
    [button1 addTarget:self action:@selector(selectFavorite) forControlEvents:UIControlEventTouchUpInside];

    origin.rightView = button;
    destination.rightView = button1;
    origin.rightViewMode = UITextFieldViewModeAlways;
    destination.rightViewMode = UITextFieldViewModeAlways;


    self.navigationItem.title = @"Where to go?";
    //self.navigationItem.leftBarButtonItem;
    //self.navigationItem.rightBarButtonItem;
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (IBAction) selectFavorite:(id) sender
{
    NSLog(@"TEST");

}

Answer 1

@selector(selectFavorite) 和 @selector(selectFavorite:) 引用的方法不一样，冒号很重要。由于您的方法是 - (IBAction) selectFavorite:(id) sender，因此您需要在 @selector 中包含冒号。