iphone @selector带参数问题

今天是3月15号国际消费者权益日，现在就记录下有关@selector的相关问题。

1 增加手势：

UITapGestureRecognizer *oneFingerTwoTaps =

[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerTwoTaps:)] autorelease];

// Set required taps and number of touches

[oneFingerTwoTaps setNumberOfTapsRequired:2];

[oneFingerTwoTaps setNumberOfTouchesRequired:1];

// Add the gesture to the view

[[self view] addGestureRecognizer:oneFingerTwoTaps];

- (void)oneFingerTwoTaps:(UITapGestureRecognizer *)recognizer

{

UIView *viewT = [recognizer view];

if (viewT.tag==0)

{

NSLog(@"Action: One finger, two taps");

}

如果要带一个参数的话，@selector(里头必须有一个“：”)；

如果是没有带参数的话，请看下面的代码:同样也是看红色的部分。若@selector没有带参数的话，@selector(里头不需要有“:”)

UITapGestureRecognizer *oneFingerTwoTaps =

[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneFingerTwoTaps)] autorelease];