iOS 退出键盘的方法

键盘现在有个框架叫IQKeyboardManager十分吊, 如果你不想集成这个框架, 那么可以用我这个方法. 大体方式是: 放出全局通知, 监听键盘的弹出与退出, 在弹出时, 在键盘的上方加一个退出按钮, 全局只设置一次, 发一次通知就可以满足所有的textfiled, 具体代码如下:

AppDelegate.h文件

//
//  AppDelegate.h
//  HeHuJianKang
//
//  Created by zzt on 16/12/7.
//  Copyright © 2016年 zzt. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
//点击退出键盘的按钮
@property (nonatomic, weak)UIButton *closeKeyBoard;

@end

AppDelegate.m文件

//
//  AppDelegate.m
//  HeHuJianKang
//
//  Created by zzt on 16/12/7.
//  Copyright © 2016年 zzt. All rights reserved.
//

#import "AppDelegate.h"
#import "ZTTabbarViewController.h"
@interface AppDelegate ()    
@end

@implementation AppDelegate
    
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   
    
    //设置根控制器
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    ZTTabbarViewController *tab = [[ZTTabbarViewController alloc]init];
    self.window.rootViewController = tab;
    [self.window makeKeyAndVisible];

    //键盘退出按钮的添加, 全局的通知, 监测键盘的通知
    //添加自动退出键盘的按钮
    UIButton *closeKeyBoard = [[UIButton alloc]init];
    _closeKeyBoard = closeKeyBoard;
    _closeKeyBoard.frame = CGRectMake(0, MAXFLOAT, ZTScreenW, 30) ;
    //发出通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHidden:) name:UIKeyboardWillHideNotification object:nil];

    return YES;
}

//实现通知的方法,键盘将要隐藏
-(void)keyboardWillHidden:(NSNotification *)notification {
    [UIView animateWithDuration:1.0 animations:^{
        _closeKeyBoard.frame = CGRectMake(0, MAXFLOAT, ZTScreenW, _closeKeyBoard.zt_height);
    }];
}
    
//实现通知的方法,键盘将要显示
- (void)keyboardWillShow:(NSNotification *)notification {
    //这样就拿到了键盘的位置大小信息frame，然后根据frame进行高度处理之类的信息
    CGRect frame = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyboardH = frame.size.height;
    
    // 取得键盘的动画时间，这样可以在视图上移的时候更连贯
    double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    
    [UIView animateWithDuration:duration animations:^{
        UIWindow * window=[[[UIApplication sharedApplication] delegate] window];
        _closeKeyBoard.frame = CGRectMake(0, ZTScreenH - keyboardH - _closeKeyBoard.zt_height, ZTScreenW,_closeKeyBoard.zt_height);
        _closeKeyBoard.backgroundColor = [UIColor whiteColor];
        [_closeKeyBoard setBackgroundImage:[UIImage imageNamed:@"pack-up"] forState:UIControlStateNormal];
        [_closeKeyBoard setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
        [window addSubview:_closeKeyBoard];
        //添加事件
        [_closeKeyBoard addTarget:self action:@selector(closeKeyboard) forControlEvents:UIControlEventTouchUpInside];
    }];
}
    
#pragma mark - 收起键盘
- (void)closeKeyboard {
    //[self.searchBar resignFirstResponder];
    [self.window endEditing:YES];
}

就可以了.

但是遮挡问题自己还要在监听键盘计算键盘的高度之后, 再确定textfiled的位置之后, 再相应修改view的Y值, 这样并不是一个好方法, IQKeyboardManager框架只要一句话都搞定了, 自己思量.