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标题: ios - View 下方和键盘顶部的粘滞按钮 [打印本页]

作者: 菜鸟教程小白    时间: 2022-12-11 17:02
标题: ios - View 下方和键盘顶部的粘滞按钮

我想在我的应用程序的表单中添加一个按钮,无论滚动如何,该按钮都会粘在 View 的底部。我该如何实现这个功能?

Button at the bottom of the view

Button on top of the keyboard



Best Answer-推荐答案


您将不得不使该 View 成为主 ViewController View 的直接 subview ,并将其放置在 View 的底部。这可以按照您希望的任何方式完成。然后,当键盘显示或隐藏时,要将其“粘合”到 View 底部,您将不得不在 中监听 UIKeyboardWillShowNotificationUIKeyboardWillHideNotification NSNotificationCenter。当这些事件触发时,您可以模仿动画持续时间和缓动方法,并按照 willshow 和 willhide 函数中给定的数量上下移动底部 View 。像这样的:

- (void)keyboardWillShowNSNotification *)aNotification
{
    NSDictionary* userInfo = [aNotification userInfo];

    // Get animation info from userInfo
    NSTimeInterval animationDuration;
    UIViewAnimationCurve animationCurve;

    CGRect keyboardEndFrame;

    [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
    [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];


    [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardEndFrame];


    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:animationDuration];
    [UIView setAnimationCurve:animationCurve];
    //Do whatever you would like to here, likely move your bottom view
    [UIView commitAnimations];
}

关于ios - View 下方和键盘顶部的粘滞按钮,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38508026/






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