隨機的時間間隔。眨眼睛。通過UIView animateWithDuration：

Question

我想創建一個動畫眨眼，在隨機間隔。就像一個正常的人會隨機閃爍。

但是，這不是我想要它做的，任何想法？

- (void)animateFrogEyeOpenClose 
{ 
    if (OpenEye) { 
     [UIView animateWithDuration:0.1 

        animations:^{ 
         eyeOpenImageView.alpha = 0.0; 
         eyeCloseImageView.alpha = 1.0; 
        } 
        completion:^(BOOL completed){ 
         if (completed) 
          OpenEye = 0; 
          CloseEye = 1; 
          [self animateFrogEyeOpenClose];     
        }      
     ]; 
    } 
    else 
    { 
     [UIView animateWithDuration:0.1 

        animations:^{ 
         eyeOpenImageView.alpha = 1.0; 
         eyeCloseImageView.alpha = 0.0; 
        } 
        completion:^(BOOL completed){ 
         if (completed) 
          OpenEye = 1; 
         CloseEye = 0; 
          [self animateFrogEyeOpenClose];     
        }     
     ]; 
    } 
} 

Answer 1

爲什麼不在隨機時間後觸發此方法？ 像

//call this method for the first time 
[self fireMethod:nil]; 
// 

- (void)fireMethod:(id)sender{ 
    int rand = arc4random(); //set the random no acc. to your requirement 
    [self animateFrogEyeOpenClose]; 
    [self performSelector:@selector(fireMthod:) withObject:nil afterDelay:rand]; 
}