iOS 数字输入键盘添加一个完成按钮

最新推荐文章于 2020-12-23 16:41:50 发布

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最新推荐文章于 2020-12-23 16:41:50 发布

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本文链接：https://blog.youkuaiyun.com/u013659478/article/details/41347705

本文介绍了如何在iOS的数字输入键盘上添加一个完成按钮。通过监听`UIKeyboardDidShowNotification`通知并在键盘出现时添加按钮，设置按钮的位置、文字、颜色，并添加点击事件处理方法。

1.添加监听事件：

[[NSNotificationCenter defaultCenter]addObserver:self
                                            selector:@selector(addDoneButtonToNumPadKeyboard)
                                                name:UIKeyboardDidShowNotification
                                              object:nil];

2.实现方法：

- (void)addDoneButtonToNumPadKeyboard
{
    UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];

    if ([[[[UIDevice currentDevice] systemVersion] substringToIndex:1] intValue] < 8.0)
    {
        doneButton.frame = CGRectMake(0, 163, 106, 53);
    }
    else
    {
        doneButton.frame = CGRectMake(0, ScreenHeight-53, 106, 53);
    }

    doneButton.tag = NUM_PAD_DONE_BUTTON_TAG;
    doneButton.adjustsImageWhenHighlighted = NO;
    [doneButton setTitle:@"完成" forState:UIControlStateNormal];
    [doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];

    NSArray *windowArr = [[UIApplication sharedApplication] windows];
    if (windowArr != nil && windowArr.count > 1){
        UIWindow *needWindow = [windowArr objectAtIndex:1];
        UIView *keyboard;
        for(int i = 0; i < [needWindow.subviews count]; i++) {
            keyboard = [needWindow.subviews objectAtIndex:i];
            NSLog(@"%@", [keyboard description]);
            if(([[keyboard description] hasPrefix:@"<UIPeripheralHostView"] == YES) || ([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES) || ([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)){

                UIView *doneButtonView = [keyboard viewWithTag:NUM_PAD_DONE_BUTTON_TAG];
                if (doneButtonView == nil){
                    [keyboard addSubview:doneButton];
                }
            }
        }
    }
}

- (void)doneButton:(UIButton *)btn
{
    NSLog(@"keyboard......");
}