iOS 代理传值

iOS 代理页面间的传值   本文主要简单总结代理传值的一般步骤 掌握其基本原理

////  NextViewController.h//  代理---C////  Created by phyone on 15/7/30.//  Copyright (c) 2015年 phyone. All rights reserved.//#import <UIKit/UIKit.h>//1.声明代理方法@protocol NextDelegate <NSObject>//- (void)toLoginWithName:(NSString *)name;//@end//@interface NextViewController : UIViewController//2.声明代理的属性 @property (nonatomic,assign)id<NextDelegate>delegate;//@property(nonatomic,copy)NSString *titleName;//@end

////  NextViewController.m//  代理---C////  Created by phyone on 15/7/30.//  Copyright (c) 2015年 phyone. All rights reserved.//#import "NextViewController.h"@interface NextViewController ()@end@implementation NextViewController- (void)viewDidLoad {    [super viewDidLoad];        self.view.backgroundColor = [UIColor grayColor];    self.title = _titleName;    UIButton *regist = [UIButton buttonWithType:UIButtonTypeCustom];    regist.frame = CGRectMake(200, 200, 100, 50);    regist.backgroundColor = [UIColor purpleColor];    [regist addTarget:self action:@selector(toRegister) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:regist];}//3.什么时候触发这个代理方法- (void)toRegister{    [self.navigationController popViewControllerAnimated:YES];//    点击注册成功后触发这个代理    //  4.通过协议的属性 调用代理方法    [self.delegate toLoginWithName:@"登录"];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

////  ViewController.m//  代理---C////  Created by phyone on 15/7/30.//  Copyright (c) 2015年 phyone. All rights reserved.//#import "ViewController.h"//5.导入代理#import "NextViewController.h"@interface ViewController ()<NextDelegate>{    UIButton *button;}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        self.title = @"登录";    self.view.backgroundColor = [UIColor grayColor];    button = [UIButton buttonWithType:UIButtonTypeCustom];    button.frame = CGRectMake(100, 100, 200, 50);    button.backgroundColor = [UIColor redColor];    [button addTarget:self action:@selector(nextVC) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button];}- (void)nextVC{    NextViewController *vc = [[NextViewController alloc]init];//      6.在初始化有代理方法的对象地方 挂上代理    vc.delegate = self;    vc.titleName = @"注册";    [self.navigationController pushViewController:vc animated:YES];}//      7.写上代理方法 等待被执行- (void)toLoginWithName:(NSString *)name{    [button setTitle:name forState:UIControlStateNormal];    NSLog(@"%@ ok",name);}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end