按钮操作没有响应iphone

Question

当我按nextButton，这是UIBarButton。然后关联的动作不执行。

UIButton *nextButton1=[UIButton buttonWithType:UIButtonTypeCustom]; 
[nextButton1 setBackgroundImage:[UIImage imageNamed:@"next.png"] forState:UIControlStateNormal]; 
[nextButton1 addTarget:self action:@selector(goToItems) forControlEvents:UIControlEventTouchUpOutside]; 
[nextButton1 sizeToFit]; 

UIBarButtonItem *nextButton=[[UIBarButtonItem alloc]initWithCustomView:nextButton1]; 
self.navigationItem.rightBarButtonItem=nextButton; 

Answer 1

[nextButton1 addTarget:self action:@selector(goToItems) forControlEvents:UIControlEventTouchUpInside]; 

你逝去的UIControlEventTouchUpOutside，应该是UIControlEventTouchUpInside

Answer 2

你通过了forcontrolevent作为UIControlEventTouchUpoutside的而不是使用

[nextButton1 addTarget:self action:@selector(goToItems) forControlEvents:UIControlEventTouchUpInside]; 

[nextButton1 addTarget:self action:@selector(goToItems) forControlEvents:UIControlEventTouchUpInside]; 

Answer 3

明显的错误是UIControlEventTouchUpOutside，你应该将其更改为UIControlEventTouchUpInside。

但是不用制作一个单独的按钮，然后将其作为视图分配给UIBarButtonItem，您可以简单地制作具有所需图像的UIBarButtonItem，并将所需的操作与其关联。

例如：

UIBarButtonItem *nextButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"next.png"] 
                   style:UIBarButtonItemStylePlain 
                   target:self 
                   action:@selector(goToItems)]; 

self.navigationItem.rightBarButtonItem = nextButton; 

[nextButton release];