Ios development-get and post, ios development-getpost

Ios development-get and post, ios development-getpost

Example: drag two controls textField and UIButton on the storyboard to connect them (userNameText, password, and login ))

@ Interface ViewController ()

@ Property (nonatomic, weak) IBOutlet UITextField * userNameText;

@ Property (nonatomic, weak) IBOutlet UITextField * passWord;

@ End

 

-(IBAction) login

{

[Self postLoginWithUserName: self. userNameText. text password: self. passWord. text];

}

Post Login

-(Void) postLoginWithUserName :( NSString *) userName password :( NSString *) password
{

// 1.url

NSURL * url = [NSURL URLWithString: @ "http: // local IP Address/login. php"];

// 2. request

NSMutableNSURLRequest * request = [NSMutableNSURLRequest requestWithURL: url];

// Submit the data question of the post request together with the request

Request. HTTPMethod = @ "POST ";

 

// Prepare data questions

NSString * bodyString = [NSString * stringWithFormat: @ "username = % @ & password = % @", username, password];

// Set binary data

Request. HTTPBody = [bodyString dataUsingEncoding: NSUTF8StringEncoding];

　　

 

// 3. Send a network connection to obtain binary data

[NSURLConnection sendAsynchronousRequest: request queue: [NSOperationQueue mainQueue] completionHandler: ^ (NSURLReponse * response, NSData * data, NSError * connectionError)];

NSString * result = [NSString alloc] initWithData: data encoding: NSUTF8Encoding];

}

 

 

 

 

Get Login

-(Void) getLoginWithUserName :( NSString *) userName password :( NSString *) password

{

// 1.url

NSString * urlString = [NSString stringWithFormat: @ "http: // local IP Address/login. php? Username = % @ & password = % @ ", userName, password];

// Percent escape

UrlString = [urlString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

NSURL * url = [NSURL URLWithString: urlString];

// 2. request

NSURLRequest * request = [NSURLRequest requestWithURL: url];

// 3. Send a network connection to obtain binary data

[NSURLConnection sendAsynchronousRequest: request queue: [NSOperationQueue mainQueue] completionHandler: ^ (NSURLReponse * response, NSData * data, NSError * connectionError)];

NSString * result = [NSString alloc] initWithData: data encoding: NSUTF8Encoding];

}

 

Summary:

1.

Get:

Http: // local IP Address/login. php? Username = % @ & password = % @

Http: // ip address/login script file? (There are parameters later) parameter variable name = parameter value & (continue parameter) variable name = Value

Post

Http: // ip address/login script

2. request

Get: no processing is required because the parameter has been specified in the URL.

Post: Specifies the access method

HTTPMethod = @ "post ";

　　

Specify binary data

HTTPBody = binary data of the parameter string

 

3. NSURLConnection asynchronous

Get is the same as post.

 

In actual network development, the request is where the change actually happens.