一个类别收键盘

创建类别 UIView+HideKeyBoard.h

.h里面没啥内容，代码如下

#import@interface UIView (HideKeyBoard)

@end

.m代码如下

#import "UIView+HideKeyBoard.h"

@implementation UIView (HideKeyBoard)

- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent *)event {

[super touchesEnded:touches withEvent:event];

[self hideViewKeyBoard];

}

- (void)hideViewKeyBoard {

[[[UIApplication sharedApplication] keyWindow] endEditing:YES];

}

@end

思路：通过重写touch方法收键盘。

但是如果用户重写了- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent *)event方法那么就没效果了，所以在使用的时候尽量避免重写touchesEnded方法，如果需要可以重写touchesBegin方法