界面之間傳值

近來項目告一段落，閑來無事，想想整理之前的筆記也開始向部落格上貢獻一點資源，供後來者借鑒，也可以當做永久的筆記，以後有時間會慢慢的将所有寫過的東西上傳到block上，

界面間傳值的方式有很多種

從前往後傳值的可以用屬性傳值比較簡單，如果你說還有沒有别的方式傳值，我隻能說我沒有用過别的，最多用過通知傳值，其他的方式還沒有試過，由于屬性傳值比較簡單，這裡就不在獒述了
界面從後往前傳值，主要介紹block傳值，代理傳值，和通知傳值

Block傳值

我這裡是履歷兩個控制器 A ，B ViewController ，PassViewcontroller

//
//  ViewController.h
//  BlockPassValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

//
//  ViewController.m
//  BlockPassValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "ViewController.h"
#import "PassViewController.h"

@interface ViewController ()
@property (nonatomic ,strong)UILabel *labe;


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    _labe = [[UILabel alloc]initWithFrame:CGRectMake(, , , )];
    _labe.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:_labe];
}

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

    PassViewController  *pass = [PassViewController new];

    //展開指派
    [pass PassValeText:^(NSString *Value) {
        _labe.text = Value;
    }];

    [self.navigationController presentViewController:pass animated:YES completion:nil];
}

//
//  PassViewController.h
//  BlockPassValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>

typedef void (^Valueblock)(NSString *Value);


@interface PassViewController : UIViewController
@property (nonatomic ,copy)Valueblock String;
- (void)PassValeText:(Valueblock)block;

//
//  PassViewController.m
//  BlockPassValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "PassViewController.h"
#import "ViewController.h"

@interface PassViewController ()
@property (nonatomic ,strong)UITextField *text;

@end

@implementation PassViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];
    _text = [[UITextField alloc]initWithFrame:CGRectMake(, , , )];
    _text.layer.borderColor = [UIColor blackColor].CGColor;
    _text.layer.borderWidth = ;
    [self.view addSubview:_text];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(, , , );
    [button setTitle:@"傳值" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(ButtonAction:) forControlEvents:UIControlEventTouchDown];
    [self.view addSubview:button];

}
- (void)PassValeText:(Valueblock)block
{
    self.String = block;

}

- (void)ButtonAction:(UIButton *)button
{
    if (self.String != nil) {
        self.String(_text.text);
    }
    [self dismissViewControllerAnimated:YES completion:nil];

}

代理傳值

同樣是建立兩個控制器 A，B ViewController ，ProtocolViewController 傳值 B->A

//
//  ViewController.h
//  DelegateResource
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

//  ViewController.m
//  DelegateResource
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "ViewController.h"
#import "ProtocolViewController.h"
@interface ViewController ()<PassingValueDelegate>
@property (nonatomic ,strong)UILabel *labe;
@property (nonatomic ,strong)NSString *string;


@end

@implementation ViewController

- (void)viewDidLoad {

    self.view.backgroundColor = [UIColor whiteColor];
    _labe = [[UILabel alloc]initWithFrame:CGRectMake(, , , )];
    _labe.backgroundColor = [UIColor cyanColor];
//    _labe.text = @"2344";

//        self.labe = label;
     [self.view addSubview:_labe];

}

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

    ProtocolViewController *pro = [ProtocolViewController new];
    _labe.text = pro.text;
    pro.delegate = self;
    UINavigationController *mna = [[UINavigationController alloc]initWithRootViewController:pro];
    [self.navigationController presentViewController:mna animated:YES completion:nil];

}


- (void)showValueToDelegate:(id)text
{
     _labe.text =text;

}

//
//  ProtocolViewController.h
//  DelegateResource
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>


@class ProtocolViewController;


@protocol PassingValueDelegate<NSObject>
@optional

- (void)viewController:(ProtocolViewController *)protocol didPassingValueWithInfo:(id)info;
- (void)showValueToDelegate:(id)text;

@required

@end;


@interface ProtocolViewController : UIViewController

@property (nonatomic ,strong)NSString *text;
@property (nonatomic ,assign)id <PassingValueDelegate>delegate;

@end

//  ProtocolViewController.m
//  DelegateResource
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "ProtocolViewController.h"
#import "ViewController.h"

@interface ProtocolViewController ()
@property (nonatomic ,strong)UITextField *textString;

@end

@implementation ProtocolViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor cyanColor];
    _textString = [[UITextField alloc]initWithFrame:CGRectMake(, , , )];
    _textString.layer.borderColor = [UIColor blackColor].CGColor;
    _textString.layer.borderWidth = ;
    [self.view addSubview:_textString];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(, , , );
    [button addTarget:self action:@selector(ButtongAction:) forControlEvents:UIControlEventTouchDown];
    [button setTitle:@"跳轉" forState:UIControlStateNormal];
    [self.view addSubview:button];

}

- (void)ButtongAction:(UIButton *)button
{
    [self.delegate showValueToDelegate:_textString.text];
    ViewController *view = [ViewController new];
    [self dismissViewControllerAnimated:YES completion:nil];
}

通知傳值

建立兩個控制器 A，B ViewController ，NoticeViewController

傳值B->A

//
//  ViewController.h
//  NotificationToValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
@end

//
//  ViewController.m
//  NotificationToValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "ViewController.h"
#import "NoticeViewController.h"

@interface ViewController ()

@property (nonatomic ,strong)UILabel *labe;


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.view.backgroundColor = [UIColor whiteColor];
    _labe = [[UILabel alloc]initWithFrame:CGRectMake(, , , )];
    _labe.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:_labe];

    //注冊通知
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(notice:) name:@"PostValue" object:nil];

}

- (void)notice:(NSNotification *)notice
{
    //接受通知傳值并指派
    NSString *string = [notice.userInfo valueForKey:@"value"];
    _labe.text = string;

}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    NoticeViewController *noticeVC = [NoticeViewController new];
    [self.navigationController presentViewController:noticeVC animated:YES completion:nil];
}

//  NoticeViewController.h
//  NotificationToValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import <UIKit/UIKit.h>

@interface NoticeViewController : UIViewController

@end

//  NoticeViewController.m
//  NotificationToValue
//
//  Created by [email protected] on 14/7/8.
//  Copyright © 2014年 [email protected] All rights reserved.
//

#import "NoticeViewController.h"

@interface NoticeViewController ()

@property (nonatomic ,strong)UITextField *text;

@end

@implementation NoticeViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    _text = [[UITextField alloc]initWithFrame:CGRectMake(, , , )];
    _text.layer.borderColor = [UIColor blackColor].CGColor;
    _text.layer.borderWidth = ;
    [self.view addSubview:_text];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(, , , );
    [button setTitle:@"傳值" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(ButtonAction:) forControlEvents:UIControlEventTouchDown];
    [self.view addSubview:button];
}

- (void)ButtonAction:(UIButton *)button
{
    //建立通知
    /*
     *通知發送的都是一個字典
     *傳送值包裝成字典
     */

    NSDictionary *dicy = @{@"value":_text.text};
    [[NSNotificationCenter defaultCenter]postNotificationName:@"PostValue" object:nil userInfo:dicy];
    [self dismissViewControllerAnimated:YES completion:nil];   
}

上面就是全部的詳細代碼，

界面之間傳值

近來項目告一段落，閑來無事，想想整理之前的筆記也開始向部落格上貢獻一點資源，供後來者借鑒，也可以當做永久的筆記，以後有時間會慢慢的将所有寫過的東西上傳到block上，

界面間傳值的方式有很多種

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