//加入手势，点击屏幕其它区域关闭键盘操作
UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(SEL)];
gesture.numberOfTapsRequired = 1;
gesture.delegate = self;
[self.view addGestureRecognizer:gesture];
#pragma mark - UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
// 若为UITableViewCellContentView（即点击了tableViewCell），则不截获Touch事件
if ([NSStringFromClass([touch.view class]) isEqualToString:@"UITableViewCellContentView"]) {
return NO;
}
return YES;
}
原文：http://www.cnblogs.com/wgwyanfs/p/6753351.html