有没有办法在iOS 7中禁用键盘上的透明度？

Question

我想要一个带有非透明键盘的键盘 - 我无法使用任何支持的UIKeyboardTypes.还有另一种方法吗？

我想我可以用键盘上的背景视图覆盖我想要的颜色 - 是否有一种很好的方法可以与键盘节目动画同步动画该背景视图？

Answer 1

当使用 iOS 7 的 Base SDK 在 Xcode 5 中编译应用程序时，iOS7 中的键盘是半透明的。
如果您在 Xcode 4.6.x 上构建应用程序，您将像以前一样拥有非半透明的键盘。
（我知道这是一个糟糕的修复，但尽管如此，我想我会建议它）

无论如何，您也可以尝试使用默认键盘通知：

1. UIKeyboardWillShowNotification
2. UIKeyboardWillHideNotification

应该是这样的：

-(void)viewWillAppear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
}

-(void)viewWillDisappear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:UIKeyboardWillShowNotification
                                                  object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:UIKeyboardWillHideNotification
                                                  object:nil];
}

-(void)keyboardWillShow:(NSNotification *)note
{
    /*
     Would have used:
     CGRect rectStart = [note.userInfo[UIKeyboardFrameBeginUserInfoKey] CGRectValue];
     CGRect rectEnd = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

     Reason for not using:
     The above two keys are not being used although, ideally, they should have been
     since they seem to be buggy when app is in landscape mode

     Resolution:
     Using the deprecated UIKeyboardBoundsUserInfoKey since it works more efficiently
     */

    CGRect rectStart_PROPER = [note.userInfo[UIKeyboardBoundsUserInfoKey] CGRectValue];
    rectStart_PROPER.origin.y = self.view.frame.size.height;

    UIView *vwUnderlay = [self.view viewWithTag:8080];
    if (vwUnderlay) {
        [vwUnderlay removeFromSuperview];
    }

    vwUnderlay = [[UIView alloc] init];
    [vwUnderlay setFrame:rectStart_PROPER];
    [vwUnderlay setBackgroundColor:[UIColor orangeColor]];
    [vwUnderlay setTag:8080];
    [self.view addSubview:vwUnderlay];

    [UIView animateWithDuration:[note.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue]
                          delay:0
                        options:[note.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16
                     animations:^{
                         [vwUnderlay setFrame:CGRectOffset(vwUnderlay.frame, 0, -vwUnderlay.frame.size.height)];
                     }
                     completion:nil];
}

-(void)keyboardWillHide:(NSNotification *)note
{
    UIView *vwUnderlay = [self.view viewWithTag:8080];

    [UIView animateWithDuration:[note.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue]
                          delay:0
                        options:[note.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue] << 16
                     animations:^{
                         [vwUnderlay setFrame:CGRectOffset(vwUnderlay.frame, 0, vwUnderlay.frame.size.height)];
                     }
                     completion:^(BOOL finished){
                         [vwUnderlay removeFromSuperview];
                     }];
}