先创建导航栏视图,再新建两个类MainViewController(一级界面)和SecondViewController(二级界面)
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正向属性传值,反向代理传值
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//创建window
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = [[UINavigationController alloc]initWithRootViewController:[MainViewController new]];
[self.window makeKeyWindow];
return YES;
}
MainViewController.h
#import <UIKit/UIKit.h>
@interface MainViewController : UIViewController
@property(nonatomic,strong)UITextField* textFld1;
@end
MainViewController.m
#import "MainViewController.h"
#import "SecondViewController.h"
@interface MainViewController ()<VCPro>
@end
@implementation MainViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor cyanColor];
[self creatUI];
}
#pragma mark --- creatUI
-(void)creatUI
{
self.textFld1 = [[UITextField alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)];
self.textFld1.backgroundColor = [UIColor purpleColor];
[self.view addSubview:_textFld1];
UIButton *pushButton = [UIButton buttonWithType:(UIButtonTypeSystem)];
pushButton.frame = CGRectMake(0, 150, self.view.frame.size.width, 30);
[pushButton setTitle:@"push" forState:(UIControlStateNormal)];
[pushButton addTarget:self action:@selector(PushClick:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:pushButton];
}
#pragma mark --- 按钮点击事件
-(void)PushClick:(UIButton *)sender
{
SecondViewController *secondVC = [SecondViewController new];
secondVC.lableString = self.textFld1.text;
secondVC.delegate1 = self;
[self.navigationController pushViewController:secondVC animated:YES];
}
#pragma mark --- 实现协议
-(void)byValue:(NSString *)sender{
self.textFld1.text = sender;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
SecondViewController.h
#import <UIKit/UIKit.h>
#import "VCPro.h"
@interface SecondViewController : UIViewController
@property(nonatomic,assign)id<VCPro> delegate1;
@property(nonatomic,copy)NSString *lableString;
@property(nonatomic,strong)UITextField* textFld2;
@end
SecondViewController.m
#import "SecondViewController.h"
#import "MainViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor purpleColor];
[self creatUI];
}
#pragma mark --- creatUI
-(void)creatUI
{
self.textFld2 = [[UITextField alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)];
self.textFld2.backgroundColor = [UIColor cyanColor];
[self.view addSubview:_textFld2];
UIButton *pushButton = [UIButton buttonWithType:(UIButtonTypeSystem)];
pushButton.frame = CGRectMake(0, 150, self.view.frame.size.width, 30);
[pushButton setTitle:@"pop" forState:(UIControlStateNormal)];
[pushButton addTarget:self action:@selector(PopClick:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:pushButton];
_textFld2.text = self.lableString;
}
#pragma mark --- 按钮点击事件
-(void)PopClick:(UIButton *)sender
{
[self.delegate1 byValue:_textFld2.text];
[self.navigationController popToRootViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
VCPro.h
#import <Foundation/Foundation.h>
@protocol VCPro <NSObject>
-(void)byValue:(NSString *)sender;
@end
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通知传值
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//创建window
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = [[UINavigationController alloc]initWithRootViewController:[FirstViewController new]];
[self.window makeKeyWindow];
return YES;
}
FirstViewController.m
#import "FirstViewController.h"
#import "SencedViewController.h"
@interface FirstViewController ()
@property(nonatomic,strong)UITextField *textF;
@end
@implementation FirstViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor orangeColor];
[self creatUI];
//第二步:谁接受消息，谁注册通知(注册监听者)
//注册监听者
//addObserver:监听者，一般都是控制器本身去监听一个通知中心
//selector:当监听到通知中心发送的通知，执行此方法
//name:通知中心名字，和要发送通知的对象名一样
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(ChangeTextF:) name:@"ChangeValue" object:nil];
}
-(void)ChangeTextF:(NSNotification *)sender
{
NSDictionary *dict = sender.userInfo;
self.textF.text = dict[@"Data"];
}
-(void)creatUI
{
self.textF = [[UITextField alloc]initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)];
self.textF.backgroundColor = [UIColor whiteColor];
[self.view addSubview:self.textF];
//按钮
UIButton *pushButton = [UIButton buttonWithType:(UIButtonTypeSystem)];
pushButton.frame = CGRectMake(0, 140, self.view.frame.size.width, 30);
pushButton.backgroundColor = [UIColor cyanColor];
[pushButton setTitle:@"push" forState:(UIControlStateNormal)];
[pushButton addTarget:self action:@selector(PushCliuck:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:pushButton];
}
-(void)PushCliuck:(UIButton *)sender
{
SencedViewController *secondVC = [SencedViewController new];
//跳转
[self.navigationController pushViewController:secondVC animated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
SencedViewController.h
#import <UIKit/UIKit.h>
@interface SencedViewController : UIViewController
#pragma mark - 通知传值
/*
通知传值：
1.需要发送通知的物体
2.接受者：谁监听谁接收(注册通知 -> name前后一定要一样)
3.实现通知内部方法，并实现传值
4.消息发送完成，移除监听者
*/
@end
SencedViewController.m
#import "SencedViewController.h"
@interface SencedViewController ()
@property(nonatomic,strong)UITextField *textF;
@end
@implementation SencedViewController
- (void)viewDidLoad {
[super viewDidLoad];
//
self.view.backgroundColor = [UIColor cyanColor];
[self creatUI];
}
-(void)creatUI
{
self.textF = [[UITextField alloc]initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)];
self.textF.backgroundColor = [UIColor whiteColor];
[self.view addSubview:self.textF];
//按钮
UIButton *pushButton = [UIButton buttonWithType:(UIButtonTypeSystem)];
pushButton.frame = CGRectMake(0, 140, self.view.frame.size.width, 30);
pushButton.backgroundColor = [UIColor orangeColor];
[pushButton setTitle:@"push" forState:(UIControlStateNormal)];
[pushButton addTarget:self action:@selector(PopCliuck:) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:pushButton];
}
-(void)PopCliuck:(UIButton *)sender
{
//发送通知
//postNotificationName:通知中心名字
//object:接收对象
//userInfo:携带参数
[[NSNotificationCenter defaultCenter] postNotificationName:@"ChangeValue" object:nil userInfo:@{@"Data":self.textF.text}];
//跳转
[self.navigationController popViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
