Question

当UIWebView显示键盘时，顶部有一个小工具栏（附件项），按钮“已完成，上一个，下一个”

目前，我正在使用以下方法删除此工具栏：

https://gist.github.com/2048571

但是，我担心这可能不适用于iOS的未来版本。有没有更好的方法来做到这一点？

Answer 1

首先，听一下键盘事件：

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

当键盘显示时，删除工具栏：

- (void)keyboardWillShow:(NSNotification *)note {
[self performSelector:@selector(removeBar) withObject:nil afterDelay:0];
}

removeBar如下：

- (void)removeBar {
    // Locate non-UIWindow.
    UIWindow *keyboardWindow = nil;
    for (UIWindow *testWindow in [[UIApplication sharedApplication] windows]) {
        if (![[testWindow class] isEqual:[UIWindow class]]) {
            keyboardWindow = testWindow;
            break;
        }
    }

    // Locate UIWebFormView
    for (UIView *possibleFormView in [keyboardWindow subviews]) {
        if ([[possibleFormView description] hasPrefix:@"<UIPeripheralHostView"]) {
            for (UIView* peripheralView in [possibleFormView subviews]) {

                // hides the backdrop (iOS 7)
                if ([[peripheralView description] hasPrefix:@"<UIKBInputBackdropView"]) {
                    //skip the keyboard background....hide only the toolbar background
                    if ([peripheralView frame].origin.y == 0){
                        [[peripheralView layer] setOpacity:0.0];
                    }
                }
                // hides the accessory bar
                if ([[peripheralView description] hasPrefix:@"<UIWebFormAccessory"]) {
                    // remove the extra scroll space for the form accessory bar
                    UIScrollView *webScroll;
                    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 5.0) {
                        webScroll = [[self webView] scrollView];
                    } else {
                        webScroll = [[[self webView] subviews] lastObject];
                    }
                    CGRect newFrame = webScroll.frame;
                    newFrame.size.height += peripheralView.frame.size.height;
                    webScroll.frame = newFrame;

                    // remove the form accessory bar
                    [peripheralView removeFromSuperview];
                }
                // hides the thin grey line used to adorn the bar (iOS 6)
                if ([[peripheralView description] hasPrefix:@"<UIImageView"]) {
                    [[peripheralView layer] setOpacity:0.0];
                }
            }
        }
    }
}

参考：https://github.com/don/KeyboardToolbarRemover/blob/master/src/ios/KeyboardToolbarRemover.m

删除UIWebView键盘上的附件项

1 个答案: