关于收键盘 在viewDidLoad里添加以下代码

self.view.userInteractionEnabled =YES;
UITapGestureRecognizer* guest = [[UITapGestureRecognizeralloc]
initWithTarget:selfaction:@selector(touchView:)];
[self.viewaddGestureRecognizer:guest];

然后在外部定义一个名为touchView的方法

-(void)touchView:(UITapGestureRecognizer*) recognizer{
[self.viewendEditing:YES];
}

加入上述代码后，当点击屏幕的任意地方，手机的键盘就会收起来