按鈕操作沒有響應iphone

Question

當我按nextButton，這是UIBarButton。然後關聯的動作不執行。

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，應該是UIControlEventTouchUpInside

Answer 2

你通過了forcontrolevent作爲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

明顯的錯誤是UIControlEventTouchUpOutside，你應該將其更改爲UIControlEventTouchUpInside。

但是不用製作一個單獨的按鈕，然後將其作爲視圖分配給UIBarButtonItem，您可以簡單地製作具有所需圖像的UIBarButtonItem，並將所需的操作與其關聯。

例如：

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

self.navigationItem.rightBarButtonItem = nextButton; 

[nextButton release];