删除UIWebView的键盘

Question

当UIWebView中显示的键盘上的accesory项目，则在顶部（附件项目）一个小工具栏，有按钮“完成后，上一页，下一页”

目前，我使用以下作为一种变通方法来删除此工具栏：

https://gist.github.com/2048571

不过，我担心这可能不是在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]; 

时，键盘会显示，删除工具栏：

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

的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