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IOS单击背景推出键盘

1. 手势(触背景)关闭键盘

在ViewDidLoad中调用

-(void)tapBackground //在ViewDidLoad中调用{    UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapOnce)];//定义一个手势    [tap setNumberOfTouchesRequired:1];//触击次数这里设为1    [self.view addGestureRecognizer:tap];//添加手势到View中}-(void)tapOnce//手势方法{
[self.view endEditing:YES];
}

2. 直接关闭

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    [self.view endEditing:YES];}