点击空白处回收键盘

在viewDidLoad里写

self.userInteractionEnabled = YES;

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(fingerTapped:)];

[self.view addGestureRecognizer:singleTap];

-(void)fingerTapped:(UITapGestureRecognizer *)gestureRecognizer

{

    [self.view endEditing:YES];

}