UIViewController 键盘弹出或者销售

- (void)viewDidLoad
{

UITapGestureRecognizer *pangesureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(PangesureRecongFrom:)];
[self.view addGestureRecognizer:pangesureRecognizer];//关键语句，给self.view添加一个手势监测；
}

-(void)PangesureRecongFrom:(UITapGestureRecognizer *)recognizer
{
[self.view endEditing:YES];
}