考虑到项目多处使用监听来处理键盘弹出时的页面遮挡问题 就讲键盘监听的响应事件用block封装在工具类中。实现方法如下

.h文件

//添加键盘监听

typedef void (^keyBoardWillShowAction) (CGFloat keyBoardHight);

typedef void (^keyBoardWillDissMissAction) (CGFloat keyBoardHight);

@property (nonatomic, copy) keyBoardWillShowAction showBlock;

@property (nonatomic, copy) keyBoardWillDissMissAction dissMissBlock;

- (void)addKeyBoardObservershowBlock:(keyBoardWillShowAction)showBlockAction dissMissAction:(keyBoardWillDissMissAction)dissMissAction;

.m文件：

- (void)addKeyBoardObservershowBlock:(keyBoardWillShowAction)showBlockAction dissMissAction:(keyBoardWillDissMissAction)dissMissAction;

{

self.showBlock = showBlockAction;

self.dissMissBlock = dissMissAction;

//监听当键盘将要出现时

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillShow:)

name:UIKeyboardWillShowNotification

object:nil];

//监听当键将要退出时

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(keyboardWillHide:)

name:UIKeyboardWillHideNotification

object:nil];

}

//当键盘出现

- (void)keyboardWillShow:(NSNotification *)notification

{

NSDictionary *userInfo = [notification userInfo];

NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [value CGRectValue];

CGFloat height = keyboardRect.size.height;

self.showBlock(height);

}

//当键退出

- (void)keyboardWillHide:(NSNotification *)notification

{

NSDictionary *userInfo = [notification userInfo];

NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

CGRect keyboardRect = [value CGRectValue];

CGFloat height = keyboardRect.size.height;

self.dissMissBlock(height);

}

使用方法

[[APIString shareInstance] addKeyBoardObservershowBlock:^(CGFloat keyBoardHight) {

            [UIView animateWithDuration:0.5 animations:^{

        //出现时候的事件

        }];

} dissMissAction:^(CGFloat keyBoardHight) {

        [UIView animateWithDuration:0.5 animations:^{

        //消失时候的事件

        }];

}];