當按下按鈕時不動畫iOS

Question

我已經編程式地在xcode中添加了按鈕，但是當我通過模擬器運行它時，它不會動畫，即它不像通常那樣閃爍？

這是怎麼了，我增加了一個按鈕：

closeButton = [[UIButton alloc] init]; 
closeButton.frame = CGRectMake(505, 5, 20, 20); 
[closeButton setImage:imgBtn forState:UIControlStateNormal]; 
[closeButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal]; 
[closeButton addTarget:self action:@selector(closeButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; 
[self.view addSubview:closeButton]; 

Answer 1

試試這個

closeButton = [[UIButton alloc] init]; 
closeButton = [UIButton buttonWithType:UIButtonTypeRoundedRect] 
closeButton.frame = CGRectMake(505, 5, 20, 20); 
[closeButton setImage:imgBtn forState:UIControlStateNormal]; 
[closeButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal]; 
[closeButton addTarget:self action:@selector(closeButtonPressed:) forControlEvents:UIControlEventTouchUpInside]; 
[self.view addSubview:closeButton]; 

Answer 2

您可以添加此看到觸摸事件

closeButton.showsTouchWhenHighlighted = YES; 

或者你要使用按鈕式UIButtonTypeRoundedRect看到按鈕按下效果。