按钮动作没有响应iPhone

Question

当我按下nextButton，这是UIBarButton。然后不执行相关操作。

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];

您正在通过UIControlEventTouchUpOutside，应该是UIControlEventTouchUpInside

Answer 2

您将forcontrolevent作为UIControlEventTouchUpoutside传递而不是使用

[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，您应该将其更改为UIControlEventTouchUpInside。

但是，不是单独创建一个按钮，然后将其指定为UIBarButtonItem的视图，您只需使用所需的图像制作UIBarButtonItem，然后将所需的操作与其关联即可。

例如：

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

self.navigationItem.rightBarButtonItem = nextButton;

[nextButton release];