监听键盘高度oc---swfit

最新推荐文章于 2019-05-09 10:05:06 发布

iOS小混混

最新推荐文章于 2019-05-09 10:05:06 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/w6524587/article/details/53394366

本文介绍了一个使用Swift实现的iOS应用中处理键盘显示和隐藏通知的方法。通过NSNotificationCenter来监听UIKeyboardWillShowNotification和UIKeyboardWillHideNotification两个通知，可以获取到键盘的高度信息。

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oc:
- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)keyboardWillShow:(NSNotification *)noti
{
    NSDictionary *userInfo = [noti userInfo];
    NSValue *v = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect = [v CGRectValue];
    int height = keyboardRect.size.height;
}
- (void)keyboardWillHide:(NSNotification *)aNotification
{
}
swift:

    override func viewDidLoad() {
        super.viewDidLoad()
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIKeyboardWillHideNotification, object: nil)
    }
    func keyboardWillShow(noti: NSNotification) {
        let userInfo = (noti.userInfo)! as NSDictionary
        let v = (userInfo.objectForKey(UIKeyboardFrameEndUserInfoKey)) as! NSValue
        let keyboardRect = v.CGRectValue()
        let height = keyboardRect.size.height
    }
    func keyboardWillHide(noti: NSNotification) {
    }