//
//  MainViewController.m
//  UI07_界面傳值
//
//  Created by dllo on 15/8/6.
//  Copyright (c) 2015年 zhozhicheng. All rights reserved.
//

#import MainViewController.h
#import SecondViewController.h
//4.簽訂協議
@interface MainViewController ()
@property(nonatomic,retain)UILabel *label;
@property(nonatomic,retain)UIButton *button;

@end

@implementation MainViewController
-(void)dealloc
{
    [_label release];
    [_button release];
    [super dealloc];
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor orangeColor];
    //設置成不透明
    self.navigationController.navigationBar.translucent=NO;
    self.title=@第一頁;

    self.label=[[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 40)];
    self.label.backgroundColor=[UIColor yellowColor];
    [self.view addSubview:self.label];
    [self.label release];


    UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];
    button.frame=CGRectMake(100, 200, 100, 40);
    [button setTitle:@下一頁 forState:UIControlStateNormal];
    button.layer.borderWidth=1;
    button.layer.cornerRadius=10;
    [self.view addSubview:button];
    [button addTarget:self action:@selector(click:) forControlEvents:
     UIControlEventTouchUpInside];

}
-(void)click:(UIButton *)button
{
    SecondViewController *secVC=[[SecondViewController alloc] init];
    [self.navigationController pushViewController:secVC animated:YES ];
    [secVC release];
    //5.設置代理人
    secVC.delegate=self;

}
//6.實現協議方法
-(void)changeValue:(NSString *)value
{
    NSLog(@%@,value);
    self.label.text=value;
}

- (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
//  UI07_界面傳值
//
//  Created by dllo on 15/8/6.
//  Copyright (c) 2015年 zhozhicheng. All rights reserved.
//

#import 

//協議傳值第一步
//1.聲明一份協議
@protocol SecondViewControllerDelegate 

//協議方法
-(void)changeValue:(NSString *)value;

@end

@interface SecondViewController : UIViewController
//2.設置代理人屬性
@property(nonatomic,assign)iddelegate;




@end

//
//  SecondViewController.m
//  UI07_界面傳值
//
//  Created by dllo on 15/8/6.
//  Copyright (c) 2015年 zhozhicheng. All rights reserved.
//

#import SecondViewController.h

@interface SecondViewController ()
 //一個textfield 一個button
@property(nonatomic,retain)UITextField *textfield;
@property(nonatomic,retain)UIButton *button;
@end

@implementation SecondViewController
-(void)dealloc
{
    [_button release];
    [_textfield release];
    [super dealloc];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor =[UIColor cyanColor];
    self.title=@第二頁;

    UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];
    button.frame=CGRectMake(100, 200, 100, 40);
    [button setTitle:@返回 forState:UIControlStateNormal];
    button.layer.borderWidth=1;
    button.layer.cornerRadius=10;
    [self.view addSubview:button];
    [button addTarget:self action:@selector(click:) forControlEvents:
     UIControlEventTouchUpInside];

    self.textfield=[[UITextField alloc] initWithFrame:CGRectMake(100, 100, 100, 40)];
    self.textfield.layer.borderWidth=1;
    self.textfield.layer.cornerRadius=10;
    [self.view addSubview:self.textfield];
    [self.textfield release];



}
//協議的觸發條件是點擊按鈕,所以在這裡進行協議傳值第三步
//3.設置代理人執行協議的方法
-(void)click:(UIButton *)button
{
    [self.navigationController popToRootViewControllerAnimated:YES];
    [self.delegate changeValue:self.textfield.text];
}

- (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