ios - 在 iOS 中 x 秒后从 UIButton 更改 UIImage

Question

我正在尝试在 1 秒后从 uibutton 更改 uiimage。我试着让线程休眠

[button1 setImage:[UIImage imageNamed:@"sameThing.png"] forState:UIControlStateNormal];

[NSThread sleepForTimeInterval:1]; 

[button1 setImage:[UIImage imageNamed:@"interrogation.png"] forState:UIControlStateNormal];

但是图像没有变化，Thread正常执行感谢您的建议

Answer 1

试试这个

[self performSelector:@selector(updateBtnImage:)
           withObject: someObject       
           afterDelay:1];



-(void) updateBtnImage: (id) obj
{    
         //Set image here
         //If still not updating image here dispatch block on main thread manually like this 
            dispatch_async(dispatch_get_main_queue(), 
             ^{
             //Set image in this block 
              });

}