iOS NSNotification(通知)传值~demo

//联系人:石虎 QQ: 1224614774昵称:嗡嘛呢叭咪哄

/**

注意点: 1.看 GIF 效果图.

2.看连线视图的效果图.

3.看实现代码(直接复制实现效果).

一、GIF 效果图:

二、连线视图的效果图:

图1:

iOS NSNotification(通知)传值~demo

图2:

三、实现代码:

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控制器1:

// ViewController.m

// 通知测试 dome

// Created by 石虎 on 2017/7/22.

#import "ViewController.h"

#import "SHTwoViewController.h"

@interface ViewController ()

//显示传值的内容

@property (weak,nonatomic)IBOutletUILabel *textStrng;

//跳转

- (IBAction)notificationClick:(UIButton *)sender;

@end

@implementation ViewController

- (void)viewDidLoad {

[superviewDidLoad];

//注册通知----第一部

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(showLabelText:)name:@"labelTextNotification"object:nil];

}

//实现通知监听 ---第二部

- (void)showLabelText:(NSNotification *)notification

{

//第三,实现通知中心内部的方法,并实现传值

id text = notification.object;

//赋值到文本上面

self.textStrng.text = text;

}

//释放通知 ---第四部

- (void)dealloc

{

//第四步,消息发送完,要移除掉

[[NSNotificationCenterdefaultCenter]removeObserver:selfname:@"labelTextNotification"object:nil];

}

#pragma mark -//点击通知跳转

- (IBAction)notificationClick:(UIButton *)sender{

SHTwoViewController *twoVC =[[SHTwoViewControlleralloc]init];

[selfpresentViewController:twoVCanimated:YEScompletion:nil];;

}

@end

=========================

===================================================

==========================

控制器2:

/ SHTwoViewController.m

// 通知测试 dome

// Created by 石虎 on 2017/7/22.

#import "SHTwoViewController.h"

#import "ViewController.h"

@interface SHTwoViewController ()

//输入要传值的文字

@property (weak,nonatomic)IBOutletUITextField *TextField;

//开始传值

- (IBAction)startValue:(id)sender;

@end

@implementation SHTwoViewController

- (void)viewDidLoad {

[superviewDidLoad];

}

//开始传值

- (IBAction)startValue:(id)sender

{

//发布通知----第三部

[[NSNotificationCenterdefaultCenter]postNotificationName:@"labelTextNotification"object:self.TextField.text];

[selfdismissViewControllerAnimated:YEScompletion:nil];

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

[self.viewendEditing:YES];

}

@end

谢谢!!!

iOS NSNotification(通知)传值~demo

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