避免点击多次的方案

1、手势过滤方案

2、用户响应增加延时操作

//以collectionView为例

[collectionView setUserInteractionEnabled:NO];

[collectionView performSelector:@selector(setUserInteractionEnabled:) withObject:[NSNumber numberWithBool:YES] afterDelay:1.0f];

//btn

self.button.enabled = NO;  

[self performSelector:@selector(changeButtonStatus) withObject:nil afterDelay:1.0f];//防止用户重复点击