iOS 页面跳转传值，属性传值，代理传值，代码块传值，单例传值，通知传值
有时候我们在页面跳转的时候回传递相应的参数，如，你想把在第一个页面的文本框里的内容显示在第二个文本框中，或者你又想把第二个文本框中的内容改变之后到第一个页面的文本框中，所有，这个时候我们就要用到页面跳转传值
1.属性传值（正向传值）
属性传值是正向传值，只可以从前面一个页面传递到第二个页面，不可以从第二个页面传递到第一个页面
2.代理传值（逆向传值）
代理传值是逆向传值
代理传值步骤
代理传值
适用于 反向传值
1.1 创建协议 及协议方法 在反向传值的页面（SecondViewController）中
1.2 创建协议类型的属性 在SecondViewController中创建属性id<postValueDelegate> delegate
1.3 调用属性 即delegate
在SecondViewController页面中 对象传值的方法中调用
[self.delegate postValue:self.textName.text];
1.4 在第一页 即显示修改过信息的页面
遵循协议 实现协议方法 指定代理对象（即 在页面传值参数的方法中为代理赋值）
具体代码如下
firstViewController.h
#import <UIKit/UIKit.h>
#import "secondViewController.h"
@interface firstViewController : UIViewController<postValueDeletage,UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@end
firstViewController.m
#import "firstViewController.h"
@interface firstViewController ()
@end
@implementation firstViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:0.565 green:1.000 blue:0.994 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.delegate=self;
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"点击" forState:];
[self.btn addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
}
-(void)postValue:(NSString *)str{
self.name1.text=str;
}
-(void)next{
secondViewController *second=[[secondViewController alloc]init];
second.deletage=self;
second.str=self.name1.text;
[self presentViewController:second animated:YES completion:nil];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
secondViewController.h 第二个页面
#import <UIKit/UIKit.h>
@protocol postValueDeletage <NSObject> -(void)postValue:(NSString *)str; @end
@interface secondViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@property(nonatomic,strong)NSString *str;
@property(nonatomic,assign)id<postValueDeletage> deletage;
@end
secondViewController.m
#import "secondViewController.h"
@interface secondViewController ()
@end
@implementation secondViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:1.000 green:0.314 blue:0.659 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
self.name1.text=self.str;
[self.view addSubview:self.name1];
self.name1.delegate=self;
self.name1.text=self.str;
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"上一页" forState:];
[self.btn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
}
-(void)back{
[self.deletage postValue:self.name1.text];
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
AppDelegate.h
#import <UIKit/UIKit.h>
#import "firstViewController.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate> @property (strong, nonatomic) UIWindow *window; @end
AppDelegate.m文件
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
firstViewController *first=[[firstViewController alloc]init];
self.window.rootViewController=first;
return YES;
}
3.单例传值（双向传值）
首先创建一个单例类
AppStatus.h
#import <Foundation/Foundation.h> @interface AppStatus : NSObject<NSCopying>
@property(nonatomic,copy)NSString *contextStr;
+(AppStatus *)shareInstance;
@end
AppStatus.m文件
#import "AppStatus.h" @implementation AppStatus
static AppStatus *appstatus;
//单例方法
+(AppStatus *)shareInstance{
if (appstatus==nil) {
appstatus=[[AppStatus alloc]init];
} return appstatus;
}
//单例方法 初始化
+(instancetype)allocWithZone:(struct _NSZone *)zone{
if (appstatus==nil) {
appstatus=[super allocWithZone:zone];
}
return appstatus;
} //单例方法 复制
-(id)copyWithZone:(NSZone *)zone{ return self;
}
@end
第一个页面
firstViewController.h
#import <UIKit/UIKit.h>
#import "sceondViewController.h"
#import "AppStatus.h"
@interface firstViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@end
firstViewController.m
#import "firstViewController.h"
@interface firstViewController ()
@end
@implementation firstViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:0.565 green:1.000 blue:0.994 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
self.name1.delegate=self;
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"下一页" forState:];
[self.btn addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
}
//这个方法是执行多遍的 相当于刷新view
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//把contextStr赋值到first中文本框的内容中
self.name1.text=[AppStatus shareInstance].contextStr;
}
-(void)next{
sceondViewController *second=[[sceondViewController alloc]init];
//把first中文本框的内容赋值到contextStr中
[AppStatus shareInstance].contextStr=self.name1.text;
NSLog(@"%@",[AppStatus shareInstance].contextStr);
[self presentViewController:second animated:YES completion:nil];
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
第二个页面sceondViewController.h
#import <UIKit/UIKit.h>
#import "AppStatus.h"
@interface sceondViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@end
#import "sceondViewController.h"
@interface sceondViewController ()
@end
@implementation sceondViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:1.000 green:0.416 blue:0.612 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
self.name1.text=[AppStatus shareInstance].contextStr;
self.name1.delegate=self;
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"上一页" forState:];
[self.btn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
}
-(void)back{
//把second中的文本框的值赋值给单例类的contextStr
[AppStatus shareInstance].contextStr=self.name1.text;
NSLog(@"%@",[AppStatus shareInstance].contextStr);
[self dismissViewControllerAnimated:YES completion:nil];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
//这个方法是执行多遍的 相当于刷新view
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//把contextStr赋值到second中文本框的内容中
self.name1.text=[AppStatus shareInstance].contextStr;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
把根视图转到第一个视图，最后代码和代理模式的一样，在AppDelegate的
4.通知传值（逆向传值）
注意：通知传值是逆向传值，只能在第二个页面创建通知和发送通知，在第一个页面接收通知，并读取通知里的信息
第一个页面
firstViewController.h
#import <UIKit/UIKit.h>
#import "secondViewController.h"
@interface firstViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn; @end
firstViewController.m
#import "firstViewController.h"
@interface firstViewController ()
@end
@implementation firstViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:0.565 green:1.000 blue:0.994 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
self.name1.delegate=self;
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"点击" forState:];
[self.btn addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
//添加通知
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(ChangeNameNotification:) name:@"order" object:nil];
}
//通知方法
-(void)ChangeNameNotification:(NSNotification *)notification{
NSDictionary *nameDic=notification.userInfo;
NSLog(@"%@",nameDic);
self.name1.text=[nameDic objectForKey:@"key"];
}
-(void)next{
secondViewController *second=[[secondViewController alloc]init];
second.str=self.name1.text;
[self presentViewController:second animated:YES completion:nil];
}
//移除通知
-(void)dealloc{
[[NSNotificationCenter defaultCenter]removeObserver:self name:@"order" object:nil];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
第二个页面secondViewController.h
#import <UIKit/UIKit.h> @interface secondViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@property(nonatomic,strong)NSString *str;
@end
第二个页面secondViewController.m
#import "secondViewController.h"
@interface secondViewController ()
@end
@implementation secondViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor colorWithRed:1.000 green:0.314 blue:0.659 alpha:1.000];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.backgroundColor=[UIColor colorWithRed:0.905 green:0.903 blue:0.910 alpha:1.000];
[self.view addSubview:self.name1];
self.name1.text=self.str;
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"上一页" forState:];
[self.btn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
self.btn.backgroundColor=[UIColor colorWithRed:0.210 green:0.257 blue:0.382 alpha:1.000];
[self.view addSubview:self.btn];
}
-(void)back{
//创建通知
NSNotification *no=[[NSNotification alloc]initWithName:@"order" object:self userInfo:@{@"key":self.name1.text}];
//通知中心发送通知
[[NSNotificationCenter defaultCenter] postNotification:no];
[self dismissViewControllerAnimated:YES completion:nil];
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
把根视图转到第一个视图，最后代码和代理模式的一样，在AppDelegate的
5.代码块传值（逆向传值）
代码块传值步骤
/**
* 代码块传值 从后往前传值
1.声明代码块（secondXXX.h）
2.声明一个代码块的类型属性（secondXXX.h）
3.调用代码块（secondXXX.m）
4.实现代码块(FirstXXX.m)
第一个页面firstViewController.h和
#import <UIKit/UIKit.h>
#import "secondViewController.h"
@interface firstViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn; @end
#import "firstViewController.h"
@interface firstViewController ()
@end
@implementation firstViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor redColor];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.borderStyle=;
self.name1.delegate=self;
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"下一页" forState:];
[self.btn addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.btn];
}
//-(void)postValue:(NSString *)str{
//
// self.name1.text=str;
//}
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
-(void)next{
secondViewController *second=[[secondViewController alloc]init];
second.str=self.name1.text;
second.myBlock=^(NSString *info){
self.name1.text=info;
};
// second.deletage=self;
[self presentViewController:second animated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
第二个页面 firstViewController.h和firstViewController.m
#import <UIKit/UIKit.h>
typedef void(^postValueBlock)(NSString *info);
//@protocol postValueDeletage <NSObject>
//
//-(void)postValue:(NSString *)str;
//
//@end /**
* 代码块传值 从后往前传值
1.声明代码块（secondXXX.h）
2.声明一个代码块的类型属性（secondXXX.h）
3.调用代码块（secondXXX.m）
4.实现代码块(FirstXXX.m) */ @interface secondViewController : UIViewController<UITextFieldDelegate>
@property(nonatomic,strong)UITextField *name1;
@property(nonatomic,strong)UIButton *btn;
@property(nonatomic,copy)NSString *str;
@property(nonatomic,strong)postValueBlock myBlock;
#import "secondViewController.h"
@interface secondViewController ()
@end
@implementation secondViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor grayColor];
self.name1=[[UITextField alloc]initWithFrame:CGRectMake(, , , )];
self.name1.borderStyle=;
self.name1.text=self.str;
// self.name1.backgroundColor=[UIColor ];
[self.view addSubview:self.name1];
self.btn=[[UIButton alloc]initWithFrame:CGRectMake(, , , )];
[self.btn setTitle:@"上一页" forState:];
[self.btn addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.btn];
}
-(void)back{
// if (self.deletage!=nil) {
// [self.deletage postValue:self.name1.text];
//
// }
if (self.myBlock) {
self.myBlock(self.name1.text);
}
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self.name1 resignFirstResponder];
}
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
if ([textField isFirstResponder]) {
[textField resignFirstResponder];
}
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
把根视图转到第一个视图，最后代码和代理模式的一样，在AppDelegate的
本文主要是使用第一个文本框的值传递到第二个页面的文本框中，修改第二个页面文本框中的内容，同时又显示到第一个页面的文本框中，为属性复制都写在几种传值的里面（除了单例传值）
iOS 页面跳转传值，属性传值，代理传值，代码块传值，单例传值，通知传值的更多相关文章
- iOS--页面间的代理传值（属性、代理（委托）、代码块、单例、通知）
(一)属性传值 (二)代理(委托)传值 代理传值 适用于 反向传值 (从后往前传) 1.1 创建协议 及协议方法 在反向传值的页面(SecondViewController)中 1.2 创建协议类型的 ...
- iOS页面间传值的方式 （Delegate/NSNotification/Block/NSUserDefault/单例）
iOS页面间传值的方式(Delegate/NSNotification/Block/NSUserDefault/单例) iOS页面间传值的方式(NSUserDefault/Delegate/NSN ...
- iOS页面间传值的方式（NSUserDefault/Delegate/NSNotification/Block/单例）
iOS页面间传值的方式(NSUserDefault/Delegate/NSNotification/Block/单例) 实现了以下iOS页面间传值:1.委托delegate方式:2.通知notific ...
- 【转】iOS页面间传值的方式（Delegate/NSNotification/Block/NSUserDefault/单例）-- 不错
原文网址:http://www.cnblogs.com/JuneWang/p/3850859.html iOS页面间传值的方式(NSUserDefault/Delegate/NSNotificatio ...
- iOS页面跳转及数据传递
转: http://blog.csdn.net/wang9834664/article/details/8025571 iOS页面跳转: 第一种 [self.navigationController ...
- iOS 页面间几种传值方式（属性，代理，block，单例，通知）
第二个视图控制器如何获取第一个视图控制器的部分信息 例如 :第二个界面中的lable显示第一个界面textField中的文本 这就需要用到属性传值.block传值 那么第一个视图控制器如何获的第二个视 ...
- iOS传值方式：属性，代理，block，单例，通知
正向传值均可,反向传值除属性传值不可,其余均可.下面简单介绍: (一)属性传值 第二个界面中的lable显示第一个界面textField中的文本 首先我们建立一个RootViewControllers ...
- iOS页面间传值的方式（Delegate/NSNotification/Block/NSUserDefault/单例）
iOS页面间传值实现方法:1.通过设置属性,实现页面间传值:2.委托delegate方式:3.通知notification方式:4.block方式:5.UserDefault或者文件方式:6.单例模式 ...
- ios页面跳转
reference:http://blog.csdn.net/engandend/article/details/11706323 目前,就我所学到的内容,页面跳转有三种方法 一.直接推到下一个页面 ...
随机推荐
- 问得最多的十个JavaScript前端面试问题
我知道有很多人不同意这种类型的面试.其实不管你喜不喜欢,你都得接受.尤其当你是自学的,而且要申请第一份工作时. 我估计很多有人其它方法来证明他自己,像Github/ 项目地址可能是非常理想的证明方 ...
- [锋利JQ]-图片提示效果
新知识点: 在HTML-Dom中 "style" 属性,是所有HTML标签共有的一个对象属性,这个对象属性可以为元素设置内嵌样式. style是元素的属性,但是它自身则是一个对象, ...
- 【转载】css3 content 生成内容
content一般和:before,:after一起使用,用来生成内容(img和input没有该属性),content的内容一般可以为以下四种: none: 不生成任何值. attr: 插入标签属性值 ...
- C# 获取 mp3文件信息
C# 获取 mp3文件信息[包括:文件大小.歌曲长度.歌手.专辑] 第一种方式:[代码已验证] // http://bbs.csdn.net/topics/390392612 string fil ...
- 【SQL】小心字符串拼接导致长度爆表
请看代码: DECLARE @max VARCHAR(max) SET @max='aaa...' --这里有8000个a +'bb' --连接一个varchar常量或变量 SELECT LEN(@m ...
- C ~ 链式队列与循环队列
此处的链式与循环队列可以应用于BFS和树的层序遍历.下面是对其结构和基本操作的程序描述. 1.循环队列 解决循环队列的队空和队满的方法: [1].增加一个参数count,用来记录数组中当前 ...
- 速战速决 (2) - PHP: 数据类型 bool, int, float, string, object, array
[源码下载] 速战速决 (2) - PHP: 数据类型 bool, int, float, string, object, array 作者:webabcd 介绍速战速决 之 PHP 数据类型 boo ...
- Java List双击事件
1. 定义一个MouseListener: 2. 在mouseListener中增加mouseClicked事件: 3. 由MouseEvent的getSource()获得List对象: 4. 由Li ...
- PHP组件化开发
设计思想中有两种极端:大而全.小而美. 一般我们常用的库是小而美,用的框架是大而全.从Symfony实现Component式开发开始,框架的组件化逐渐成为趋势.我们可以任意的组合各种Compoent来 ...
- API 开发实践
整个2015年,如果要给自己打上一个标签的话,那应该就是 API. 在各个不同的系统中定制各种 API 框架. 在做商城对接各种电商 ERP 的 API 开发中,我采用的是兼容SHOPEX 的 API ...