iOS关闭/收起键盘方法总结

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//点击Return按扭时收起键盘
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    return [textField resignFirstResponder];
}

//点击背景View收起键盘（你的View必须是继承于UIControl）
[self.view endEditing:YES];

//你可以在任何地方加上这句话，可以用来统一收起键盘
[[[UIApplication sharedApplication] keyWindow] endEditing:YES];

//接发送 resignFirstResponder 消息
[[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) 
                                           to:nil 
                                          from:nil 
                                      forEvent:nil];