Delegate between two viewcontrollers in iOS

Source: Internet
Author: User

Delegate between two viewcontrollers in iOS
The second interface transmits values to the first InterfaceSecond Interface

 

// Configure the protocol on the Second Interface

@ Protocol ChuanZhiDelegate

-(Void) chuanzhid;

@ End

@ Interface ViewController2: UIViewController

@ Property (nonatomic, assign) id Chuanzhidelegate;

@ End


 

-(Void) viewDidLoad {

[Super viewDidLoad];

Self. view. backgroundColor = [UIColor cyanColor];

Self. btn = [[UIButton alloc] initWithFrame: CGRectMake (70,100,100, 30)];

Self. btn. backgroundColor = [UIColor redColor];

[Self. view addSubview: self. btn];

[Self. btn addTarget: self action: @ selector (chuan) forControlEvents: UIControlEventTouchUpInside];

}

-(Void) chuan {

If ([self. chuanzhidelegate respondsToSelector: @ selector (chuanzhid)]) {

[Self. chuanzhidelegate chuanzhid];

} Else {

NSLog (@ "the agent has not implemented changeStatus: Method ");

}

}


Then the first Interface

 

 

-(Void) viewDidLoad {

[Super viewDidLoad];

Self. btn = [[UIButton alloc] initWithFrame: CGRectMake (70,100,100, 30)];

Self. btn. backgroundColor = [UIColor redColor];

[Self. view addSubview: self. btn];

[Self. btn addTarget: self action: @ selector (chuanzhi) forControlEvents: UIControlEventTouchUpInside];

Self. view. backgroundColor = [UIColor lightGrayColor];

}

-(Void) chuanzhi {

ViewController2 * vc = [[ViewController2 alloc] init];

Vc. chuanzhidelegate = self; // set as the proxy of the Second Interface

[Self. navigationController pushViewController: vc animated: YES];

}

// Implementation Protocol

-(Void) chuanzhid {

NSLog (@ "proxy Implementation ");

}


Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.