分享一个写好的类。解决键盘出现 遮挡住界面的问题。现在让UI自动上移一些，能更好显示
1. .H文件
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
typedef enum {
KeyboardActionDefault,
KeyboardActionShow,
KeyboardActionHide
}KeyboardAction
@protocol KeyboardUtilProtocol- (void)adaptiveViewHandleWithAdaptiveView:(UIView *)adaptiveView, ...NS_REQUIRES_NIL_TERMINATION;
- (void)adaptiveViewHandleWithController:(UIViewController *)viewController adaptiveView:(UIView *)adaptiveView, ...NS_REQUIRES_NIL_TERMINATION;
@end
#pragma mark - KeyboardInfo(model)
@interface KeyboardInfo : NSObject
@property (assign, nonatomic) CGFloat animationDuration;
@property (assign, nonatomic) CGRect frameBegin;
@property (assign, nonatomic) CGRect frameEnd;
@property (assign, nonatomic) CGFloat heightIncrement;
@property (assign, nonatomic) KeyboardAction action;
@property (assign, nonatomic) BOOL isSameAction;
- (void)fillKeyboardInfoWithDuration:(CGFloat)duration frameBegin:(CGRect)frameBegin frameEnd:(CGRect)frameEnd heightIncrement:(CGFloat)heightIncrement action:(KeyboardAction)action isSameAction:(BOOL)isSameAction;
@end
#pragma mark - ZYKeyboardUtil
@interface ZYKeyboardUtil : NSObject
typedef void (^animateWhenKeyboardAppearBlock)(int appearPostIndex, CGRect keyboardRect, CGFloat keyboardHeight, CGFloat keyboardHeightIncrement);
typedef void (^animateWhenKeyboardDisappearBlock)(CGFloat keyboardHeight);
typedef void (^printKeyboardInfoBlock)(ZYKeyboardUtil *keyboardUtil, KeyboardInfo *keyboardInfo);
typedef void (^animateWhenKeyboardAppearAutomaticAnimBlock)(ZYKeyboardUtil *keyboardUtil);
- (void)setAnimateWhenKeyboardAppearBlock:(animateWhenKeyboardAppearBlock)animateWhenKeyboardAppearBlock;
- (void)setAnimateWhenKeyboardAppearAutomaticAnimBlock:(animateWhenKeyboardAppearAutomaticAnimBlock)animateWhenKeyboardAppearAutomaticAnimBlock;
- (void)setAnimateWhenKeyboardDisappearBlock:(animateWhenKeyboardDisappearBlock)animateWhenKeyboardDisappearBlock;
- (void)setPrintKeyboardInfoBlock:(printKeyboardInfoBlock)printKeyboardInfoBlock;
@end
#pragma mark - UIView+Utils
@interface UIView (Utils)
- (void)findControllerWithResultController:(UIViewController **)resultController;
@end
2. .M文件
#import "ZYKeyboardUtil.h"
#define MARGIN_KEYBOARD_DEFAULT 10
#define TEXTVIEW_NO_ANIM_BEGIN if ([_adaptiveView isKindOfClass:[UITextView class]]) {\
[CATransaction begin];\
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];\
}
#define TEXTVIEW_NO_ANIM_END if ([_adaptiveView isKindOfClass:[UITextView class]]) {\
[CATransaction commit];\
}
@interface ZYKeyboardUtil()
@property (assign, nonatomic) BOOL keyboardObserveEnabled;
@property (assign, nonatomic) int appearPostIndex;
@property (strong, nonatomic) KeyboardInfo *keyboardInfo;
@property (assign, nonatomic) BOOL haveRegisterObserver;
@property (weak, nonatomic) UIViewController *adaptiveController;
@property (weak, nonatomic) UIView *adaptiveView;
@property (strong, nonatomic) NSValue *prepareRectValue;
@property (copy, nonatomic) animateWhenKeyboardAppearBlock animateWhenKeyboardAppearBlock;
@property (copy, nonatomic) animateWhenKeyboardAppearAutomaticAnimBlock animateWhenKeyboardAppearAutomaticAnimBlock;
@property (copy, nonatomic) animateWhenKeyboardDisappearBlock animateWhenKeyboardDisappearBlock;
@property (copy, nonatomic) printKeyboardInfoBlock printKeyboardInfoBlock;
@end
@implementation ZYKeyboardUtil
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
#pragma mark - lazy注册观察者
- (void)registerObserver {
if (_haveRegisterObserver == YES) {
return;
}
self.haveRegisterObserver = YES;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
}
- (void)adaptiveViewHandleWithController:(UIViewController *)viewController adaptiveView:(UIView *)adaptiveView, ...NS_REQUIRES_NIL_TERMINATION {
NSMutableArray *adaptiveViewList = [NSMutableArray array];
[adaptiveViewList addObject:adaptiveView];
va_list var_list;
va_start(var_list, adaptiveView);
UIView *view;
while ((view = va_arg(var_list, UIView *))) {
[adaptiveViewList addObject:view];
}
va_end(var_list);
self.adaptiveController = viewController;
for (UIView *adaptiveViews in adaptiveViewList) {
UIView *firstResponder = nil;
[self recursionTraverseFindFirstResponderIn:adaptiveViews responder:&firstResponder];
if (nil != firstResponder) {
self.adaptiveView = firstResponder;
[self fitKeyboardAutomatically:firstResponder controllerView:viewController.view keyboardRect:_keyboardInfo.frameEnd];
break;
}
}
}
- (void)adaptiveViewHandleWithAdaptiveView:(UIView *)adaptiveView, ...NS_REQUIRES_NIL_TERMINATION {
NSMutableArray *adaptiveViewList = [NSMutableArray array];
[adaptiveViewList addObject:adaptiveView];
va_list var_list;
va_start(var_list, adaptiveView);
UIView *view;
while ((view = va_arg(var_list, UIView *))) {
[adaptiveViewList addObject:view];
}
va_end(var_list);
UIViewController *adaptiveController;
[adaptiveView findControllerWithResultController:&adaptiveController];
if (adaptiveController) {
self.adaptiveController = adaptiveController;
} else {
LOG(@"\nERROR: Can not find adaptiveView`s Controller");
return;
}
for (UIView *adaptiveViews in adaptiveViewList) {
UIView *firstResponder = nil;
[self recursionTraverseFindFirstResponderIn:adaptiveViews responder:&firstResponder];
if (nil != firstResponder) {
self.adaptiveView = firstResponder;
[self fitKeyboardAutomatically:firstResponder controllerView:adaptiveController.view keyboardRect:_keyboardInfo.frameEnd];
break;
}
}
}
- (void)recursionTraverseFindFirstResponderIn:(UIView *)view responder:(UIView **)responder {
if ([view isFirstResponder]) {
*responder = view;
} else {
for (UIView *subView in view.subviews) {
if ([subView isFirstResponder]) {
*responder = subView;
return;
}
[self recursionTraverseFindFirstResponderIn:subView responder:responder];
}
}
return;
}
- (void)fitKeyboardAutomatically:(UIView *)adaptiveView controllerView:(UIView *)controllerView keyboardRect:(CGRect)keyboardRect {
UIWindow *window = [[UIApplication sharedApplication] keyWindow];
CGRect convertRect = [adaptiveView.superview convertRect:adaptiveView.frame toView:window];
if (CGRectGetMinY(keyboardRect) - MARGIN_KEYBOARD_DEFAULT < CGRectGetMaxY(convertRect)) {
//记住originFrame
self.prepareRectValue = [NSValue valueWithCGRect:controllerView.frame];
CGFloat signedDiff = CGRectGetMinY(keyboardRect) - CGRectGetMaxY(convertRect) - MARGIN_KEYBOARD_DEFAULT;
//updateOriginY
CGFloat newOriginY = CGRectGetMinY(controllerView.frame) + signedDiff;
controllerView.frame = CGRectMake(controllerView.frame.origin.x, newOriginY, controllerView.frame.size.width, controllerView.frame.size.height);
}
}
- (void)restoreKeyboardAutomatically {
[self textViewHandle];
if (_prepareRectValue) {
self.adaptiveController.view.frame = [_prepareRectValue CGRectValue];
_prepareRectValue = nil;
}
}
- (void)textViewHandle {
//还原时 textView可能会出现offset错乱现象
if ([_adaptiveView isKindOfClass:[UITextView class]]) {
[(UITextView *)_adaptiveView setContentOffset:CGPointMake(0, 0)];
}
}
#pragma mark - 重写KeyboardInfo set方法，调用animationBlock
- (void)setKeyboardInfo:(KeyboardInfo *)keyboardInfo {
//home键使应用进入后台也会有某些通知
if([UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {
return;
}
_keyboardInfo = keyboardInfo;
if(!keyboardInfo.isSameAction || (keyboardInfo.heightIncrement != 0)) {
[UIView animateWithDuration:keyboardInfo.animationDuration animations:^{
switch (keyboardInfo.action) {
case KeyboardActionShow:
if(self.animateWhenKeyboardAppearBlock != nil) {
self.animateWhenKeyboardAppearBlock(++self.appearPostIndex, keyboardInfo.frameEnd, keyboardInfo.frameEnd.size.height, keyboardInfo.heightIncrement);
} else if (self.animateWhenKeyboardAppearAutomaticAnimBlock != nil) {
self.animateWhenKeyboardAppearAutomaticAnimBlock(self);
}
break;
case KeyboardActionHide:
if(self.animateWhenKeyboardDisappearBlock != nil) {
self.animateWhenKeyboardDisappearBlock(keyboardInfo.frameEnd.size.height);
self.appearPostIndex = 0;
} else {
//auto restore
[self restoreKeyboardAutomatically];
}
break;
default:
break;
}
[CATransaction commit];
}completion:^(BOOL finished) {
if(self.printKeyboardInfoBlock != nil && self.keyboardInfo != nil) {
self.printKeyboardInfoBlock(self, keyboardInfo);
}
}];
}
}
- (void)triggerAction {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.keyboardInfo = _keyboardInfo;
});
}
#pragma mark - 重写Block set方法，懒加载方式注册观察者
/**
* @brief handle the covering event youself when keyboard Appear, Animation automatically.
*
* use animateWhenKeyboardAppearBlock, animateWhenKeyboardAppearAutomaticAnimBlock will be invalid.
*/
- (void)setAnimateWhenKeyboardAppearBlock:(animateWhenKeyboardAppearBlock)animateWhenKeyboardAppearBlock {
_animateWhenKeyboardAppearBlock = animateWhenKeyboardAppearBlock;
[self registerObserver];
}
/**
* @brief handle the covering automatically, you must invoke the method adaptiveViewHandleWithController:adaptiveView: by the param keyboardUtil.
*
* use animateWhenKeyboardAppearAutomaticAnimBlock, animateWhenKeyboardAppearBlock must be nil.
*/
- (void)setAnimateWhenKeyboardAppearAutomaticAnimBlock:(animateWhenKeyboardAppearAutomaticAnimBlock)animateWhenKeyboardAppearAutomaticAnimBlock {
_animateWhenKeyboardAppearAutomaticAnimBlock = animateWhenKeyboardAppearAutomaticAnimBlock;
[self registerObserver];
}
/**
* @brief restore the UI youself when keyboard disappear.
*
* if not configure this Block, automatically itself.
*/
- (void)setAnimateWhenKeyboardDisappearBlock:(animateWhenKeyboardDisappearBlock)animateWhenKeyboardDisappearBlock {
_animateWhenKeyboardDisappearBlock = animateWhenKeyboardDisappearBlock;
[self registerObserver];
}
- (void)setPrintKeyboardInfoBlock:(printKeyboardInfoBlock)printKeyboardInfoBlock {
_printKeyboardInfoBlock = printKeyboardInfoBlock;
[self registerObserver];
}
- (void)setPrepareRectValue:(NSValue *)prepareRectValue {
//为nil时才设置
if (!_prepareRectValue) {
_prepareRectValue = prepareRectValue;
}
}
#pragma mark 响应selector
- (void)keyboardWillShow:(NSNotification *)notification {
[self handleKeyboard:notification keyboardAction:KeyboardActionShow];
}
- (void)keyboardWillChangeFrame:(NSNotification *)notification {
if(self.keyboardInfo.action == KeyboardActionShow){
//[self handleKeyboard:notification keyboardAction:KeyboardActionShow];
}
}
- (void)keyboardWillHide:(NSNotification *)notification {
[self handleKeyboard:notification keyboardAction:KeyboardActionHide];
}
- (void)keyboardDidHide:(NSNotification *)notification {
//置空
self.keyboardInfo = nil;
}
#pragma mark 处理键盘事件
- (void)handleKeyboard:(NSNotification *)notification keyboardAction:(KeyboardAction)keyboardAction {
//进入后台触发某些通知,不响应
if([UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {
return;
}
//解析通知
NSDictionary *infoDict = [notification userInfo];
CGRect frameBegin = [[infoDict objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
CGRect frameEnd = [[infoDict objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat previousHeight;
if(self.keyboardInfo.frameEnd.size.height > 0) {
previousHeight = self.keyboardInfo.frameEnd.size.height;
}else {
previousHeight = 0;
}
CGFloat heightIncrement = frameEnd.size.height - previousHeight;
BOOL isSameAction;
if(self.keyboardInfo.action == keyboardAction) {
isSameAction = YES;
}else {
isSameAction = NO;
}
KeyboardInfo *info = [[KeyboardInfo alloc] init];
[info fillKeyboardInfoWithDuration:DURATION_ANIMATION frameBegin:frameBegin frameEnd:frameEnd heightIncrement:heightIncrement action:keyboardAction isSameAction:isSameAction];
self.keyboardInfo = info;
}
- (void)fillKeyboardInfoWithKeyboardInfo:(KeyboardInfo *)keyboardInfo duration:(CGFloat)duration frameBegin:(CGRect)frameBegin frameEnd:(CGRect)frameEnd heightIncrement:(CGFloat)heightIncrement action:(KeyboardAction)action isSameAction:(BOOL)isSameAction {
keyboardInfo.animationDuration = duration;
keyboardInfo.frameBegin = frameBegin;
keyboardInfo.frameEnd = frameEnd;
keyboardInfo.heightIncrement = heightIncrement;
keyboardInfo.action = action;
keyboardInfo.isSameAction = isSameAction;
}
@end
#pragma mark - KeyboardInfo(model)
@interface KeyboardInfo()
- (void)fillKeyboardInfoWithDuration:(CGFloat)duration frameBegin:(CGRect)frameBegin frameEnd:(CGRect)frameEnd heightIncrement:(CGFloat)heightIncrement action:(KeyboardAction)action isSameAction:(BOOL)isSameAction;
@end
@implementation KeyboardInfo
- (void)fillKeyboardInfoWithDuration:(CGFloat)duration frameBegin:(CGRect)frameBegin frameEnd:(CGRect)frameEnd heightIncrement:(CGFloat)heightIncrement action:(KeyboardAction)action isSameAction:(BOOL)isSameAction {
self.animationDuration = duration;
self.frameBegin = frameBegin;
self.frameEnd = frameEnd;
self.heightIncrement = heightIncrement;
self.action = action;
self.isSameAction = isSameAction;
}
@end
#pragma mark - UIView+Utils
@implementation UIView (Utils)
- (void)findControllerWithResultController:(UIViewController **)resultController {
UIResponder *responder = [self nextResponder];
if (nil == responder) {
return;
}
if ([responder isKindOfClass:[UIViewController class]]) {
*resultController = (UIViewController *)responder;
} else if ([responder isKindOfClass:[UIView class]]) {
[(UIView *)responder findControllerWithResultController:resultController];
}
}
@end
3. 如何使用
#pragma mark - ========== 键盘遮挡问题 ==========
#pragma mark 键盘弹出
- (void)configKeyBoardRespond
{
self.keyboardUtil = [[ZYKeyboardUtil alloc] init];
__weak JHmessageLoginVC *weakSelf = self;
//增加需要避免遮挡的控件
[_keyboardUtil setAnimateWhenKeyboardAppearAutomaticAnimBlock:^(ZYKeyboardUtil *keyboardUtil) {
[keyboardUtil adaptiveViewHandleWithController:weakSelf adaptiveView:weakSelf.bgView,nil];
}];
}
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