UIWebView键盘的accessoryBar隐藏Word格式文档下载.docx

UIWebView键盘的accessoryBar隐藏Word格式文档下载.docx

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self.removeAccessoryBarForiOS8（keyboardWindowasUIView）

}else{

self.removeAccessoryBarForiOS7（keyboardWindowasUIView）

}

self.removeAccessoryBarForiOS9（UIApplication.sharedApplication（）.windows.last!

asUIView）

funcremoveAccessoryBarForiOS9（keyboardWindow:

UIView）->

forpossibleFormView:

UIViewinkeyboardWindow.subviews{

ifpossibleFormView.isMemberOfClass（NSClassFromString（"

UIInputSetContainerView"

）!

）{

forsubviewOfInputSetContainerViewinpossibleFormView.subviews{

ifsubviewOfInputSetContainerView.isMemberOfClass（NSClassFromString（"

UIInputSetHostView"

forsubviewOfInputSetHostViewinsubviewOfInputSetContainerView.subviews{

//隐藏工具条NSClassFromString

ifsubviewOfInputSetHostView.isMemberOfClass（NSClassFromString（"

UIWebFormAccessory"

subviewOfInputSetHostView.layer.opacity=0

subviewOfInputSetHostView.frame=CGRectZero

}elseif（subviewOfInputSetHostView.isMemberOfClass（NSClassFromString（"

_UIRemoteKeyboardPlaceholderView"

））{

//这里使用了私有方法获取对应的accessorBar，然后进行隐藏

varaccessory=subviewOfInputSetHostView.performSelector（Selector（"

placeheldView"

））.takeRetainedValue（）

ifaccessory.isMemberOfClass（NSClassFromString（"

letaccessory=accessoryas!

UIView

accessory.layer.opacity=0

accessory.frame=CGRectZero

//键盘背景,UIKBInputBackdropView有两个只隐藏上面的

elseifsubviewOfInputSetHostView.isMemberOfClass（NSClassFromString（"

UIKBInputBackdropView"

）&

&

subviewOfInputSetHostView.frame.size.height<

100{

subviewOfInputSetHostView.userInteractionEnabled=false

funcremoveAccessoryBarForiOS8（keyboardWindow:

//隐藏工具条

funcremoveAccessoryBarForiOS7（keyboardWindow:

UIPeripheralHostView"

forsubviewOfPeripheralHostViewinpossibleFormView.subviews{

ifsubviewOfPeripheralHostView.isMemberOfClass（NSClassFromString（"

subviewOfPeripheralHostView.layer.opacity=0

subviewOfPeripheralHostView.frame=CGRectZero

elseifsubviewOfPeripheralHostView.isMemberOfClass（NSClassFromString（"

subviewOfPeripheralHostView.frame.size.height<

subviewOfPeripheralHostView.userInteractionEnabled=false

实际中，隐藏键盘accessory后的样子如下图：

webview_keyboard_hideaccessory.png

需要注意的是，在示例代码使用设置layer透明，frame为空来进行隐藏，而不使用removeFromSuperView，是因为使用了removeFromSuperView，在键盘重新布局时会导致crash。

当然如果有朋友解决了crash，使用removeFromSuperView会更好。

附：

上面示例代码Github地址

使用removeFromSuperView产生crash的崩溃栈：

2016-07-0614:

10:

32.018WebViewKeyBoard[10846:

930540]Theviewhierarchyisnotpreparedfortheconstraint:

Whenaddedtoaview,theconstraint'

sitemsmustbedescendantsofthatview（ortheviewitself）.Thiswillcrashiftheconstraintneedstoberesolvedbeforetheviewhierarchyisassembled.Breakon-[UIView（UIConstraintBasedLayout）_viewHierarchyUnpreparedForConstraint:

]todebug.

930540]***Assertionfailurein-[UIInputSetHostView_layoutEngine_didAddLayoutConstraint:

roundingAdjustment:

mutuallyExclusiveConstraints:

],/BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3512.60.7/NSLayoutConstraint_UIKitAdditions.m:

590

32.025WebViewKeyBoard[10846:

930540]***Terminatingappduetouncaughtexception'

NSInternalInconsistencyException'

reason:

'

Impossibletosetuplayoutwithviewhierarchyunpreparedforconstraint.'

***Firstthrowcallstack:

（

0CoreFoundation0x0000000105517d85__exceptionPreprocess+165

1libobjc.A.dylib0x00000001072bbdebobjc_exception_throw+48

2CoreFoundation0x0000000105517bea+[NSExceptionraise:

format:

arguments:

]+106

3Foundation0x0000000105968d5a-[NSAssertionHandlerhandleFailureInMethod:

object:

file:

lineNumber:

description:

]+198

4UIKit0x0000000106626b99__120-[UIView（UIConstraintBasedLayout）_layoutEngine_didAddLayoutConstraint:

]_block_invoke_2+254

5UIKit0x000000010662698b-[UIView（UIConstraintBasedLayout）_layoutEngine_didAddLayoutConstraint:

]+385

6UIKit0x0000000106626e04-[UIView（UIConstraintBasedLayout）_tryToAddConstraintWithoutUpdatingConstraintsArray:

]+65

7UIKit0x0000000106626f7d-[UIView（UIConstraintBasedLayout）_tryToAddConstraint:

]+288

8UIKit0x000000010662719f-[UIView（UIConstraintBasedLayout）_addConstraint:

]+274

9UIKit0x0000000106627438__50-[UIView（UIConstraintBasedLayout）addConstraints:

]_block_invoke+197

10Foundation0x00000001058f23d3-[NSISEnginewithBehaviors:

performModifications:

]+155

11UIKit0x0000000106626577-[UIView（UIConstraintBasedLayout）_withAutomaticEngineOptimizationDisabled:

]+58

12UIKit0x0000000106627348-[UIView（UIConstraintBasedLayout）addConstraints:

]+379

13UIKit0x00000001066b5531-[UIInputWindowControllerupdateViewConstraints]+3558

14UIKit0x00000001066b1fde-[UIInputSetHostView_didChangeKeyplaneWithContext:

]+224

15UIKit0x000000010650f1cc-[_UIKBCompatInputView_didChangeKeyplaneWithContext:

]+87

16UIKit0x0000000106004397-[UIKeyboard_didChangeKeyplaneWithContext:

]+324

17UIKit0x0000000105fe7b04-[UIKeyboardImpl_didChangeKeyplaneWithContext:

]+1100

18UIKit0x000000010620d5a3-[UIKeyboardLayoutStar（UIKeyboardLayoutJapanese50OnFlick）_didChangeKeyplaneWithContext:

]+183

19UIKit0x00000001061f121e-[UIKeyboardLayoutStarsetKeyplaneName:

]+4512

20UIKit0x0000000106209c37-[UIKeyboardLayoutStarsetShift:

]+158

21UIKit0x0000000105fec46a-[UIKeyboardImplnotifyShiftState]+73

22CoreFoundation0x000000010543cc37__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__+23

23CoreFoundation0x000000010543cba7__CFRunLoopDoObservers+391

24CoreFoundation0x00000001054326c4__CFRunLoopRun+836

25CoreFoundation0x00000001054320f8CFRunLoopRunSpecific+488

26GraphicsServices0x0000000109badad2GSEventRunModal+161

27UIKit0x0000000105d3ff09UIApplicationMain+171

28WebViewKeyBoard0x000000010532a242main+114

29libdyld.dylib0x0000000107d7f92dstart+1

30?

?

0x00000000000000010x0+1

）

libc++abi.dylib:

terminatingwithuncaughtexceptionoftypeNSException