ios NSURLConnection 委托方法
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NSURLConnection delegate method
提问by socbrian
I am having a hard time to find any examples for NSURLConnection delegate method implementations.
我很难找到 NSURLConnection 委托方法实现的任何示例。
I want to send data with a HTTP post with a button click. Not sure how to make a "submitting" screen and "submitted". (I know how to use spinner and will use them)
我想通过单击按钮发送带有 HTTP 帖子的数据。不确定如何制作“提交”屏幕和“提交”。（我知道如何使用微调器并将使用它们）
I am using this code under a botton click action, but unable to use any delegate stuff. Not sure how to implement them with my current set up.
我在按钮单击操作下使用此代码，但无法使用任何委托内容。不确定如何使用我当前的设置来实现它们。
NSMutableURLRequest *request =
[[NSMutableURLRequest alloc] initWithURL:
[NSURL URLWithString:@"http://myURL.com"]];
[request setHTTPMethod:@"POST"];
NSString *postString = [wait stringByAppendingString:co];
[request setValue:[NSString
stringWithFormat:@"%d", [postString length]]
forHTTPHeaderField:@"Content-length"];
[request setHTTPBody:[postString
dataUsingEncoding:NSUTF8StringEncoding]];
//[[NSURLConnection alloc] initWithRequest:request delegate:self];
[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
[SVProgressHUD dismissWithSuccess:@"Submission Successful"];
采纳答案by Ricardo Rivaldo
You need to use the new NSURLConnectionDataDelegate protocol.
您需要使用新的 NSURLConnectionDataDelegate 协议。
I found some exemples here:
我在这里找到了一些例子：
And if you can read portuguese: http://www.quaddro.com.br/blog/desenvolvimento-ios/baixando-conteudo-com-nsurlconnection-e-nsurlconnectiondatadelegate-no-ios
如果您可以阅读葡萄牙语：http: //www.quaddro.com.br/blog/desenvolvimento-ios/baixando-conteudo-com-nsurlconnection-e-nsurlconnectiondatadelegate-no-ios
回答by Eric
- (void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"Did Receive Response %@", response);
responseData = [[NSMutableData alloc]init];
}
- (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{
//NSLog(@"Did Receive Data %@", data);
[responseData appendData:data];
}
- (void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error
{
NSLog(@"Did Fail");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"Did Finish");
// Do something with responseData
}
回答by Sunil Targe
//Connection request
-(void)requestURL:(NSString *)strURL
{
// Create the request.
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:strURL]];
// Create url connection and fire request
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
//Delegate methods
- (void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(@"Did Receive Response %@", response);
responseData = [[NSMutableData alloc]init];
}
- (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{
//NSLog(@"Did Receive Data %@", data);
[responseData appendData:data];
}
- (void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error
{
NSLog(@"Did Fail");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"Did Finish");
// Do something with responseData
NSString *strData=[[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding];
NSLog(@"Responce:%@",strData);
}
http://codewithchris.com/tutorial-how-to-use-ios-nsurlconnection-by-example/
http://codewithchris.com/tutorial-how-to-use-ios-nsurlconnection-by-example/
回答by user3189586
in this code you will use GCD ,Activity Indicator ,UIButton Action on login button First you will call StartActivityindicator on another thread and it keeps in moving until you remove or stop the Activityindicator. then you will call the web service for login in GCD queue . at the time you receive response from server call main queue to update the UI.
在此代码中，您将在登录按钮上使用 GCD、Activity Indicator、UIButton Action 首先，您将在另一个线程上调用 StartActivityindicator，它会一直移动，直到您删除或停止 Activityindicator。然后您将调用 Web 服务以在 GCD 队列中登录。当您收到来自服务器调用主队列的响应以更新 UI 时。
// After the interface declration
@interface LoginViewController ()
{
NSData *responseData;
dispatch_queue_t myqueue;
}
//Button Action
- (IBAction)Login_Button_Action:(id)sender
{
[NSThread detachNewThreadSelector: @selector(StartActivityindicator) toTarget:self withObject:nil];
myqueue =dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0);
dispatch_group_t group=dispatch_group_create();
dispatch_group_async(group, myqueue, ^{ [self loginWebService];});
}
-(void)loginWebService
{
//Combine Both url and parameters
NSString *UrlWithParameters = [NSString stringWithFormat:@"http://www.xxxxx.com?count=%@&user=%@&email=%@&password=%@",@"4",@"Username",s@"UserEmail",@"PAssword String"];
//Pass UrlWithParameters to NSURL
NSURL *ServiceURL =[NSURL URLWithString:UrlWithParameters];
NSMutableURLRequest *serviceRequest =[NSMutableURLRequest requestWithURL:ServiceURL];
[serviceRequest setHTTPMethod:@"POST"];
[serviceRequest setValue:@"application/json" forHTTPHeaderField:@"accept"];
[serviceRequest setValue:@"application/json" forHTTPHeaderField:@"content-type"];
//GEt Response Here
NSError *err;
NSURLResponse *response;
responseData = [NSURLConnection sendSynchronousRequest:serviceRequest returningResponse:&response error:&err];
NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
NSInteger code = [httpResponse statusCode];
// check status code for response from server and do RND for code if you recive anything than 200
NSLog(@"~~~~~ Status code: %ld",(long)code);
if (code ==200)
{
// your response is here if you call right
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options: NSJSONReadingMutableContainers error: &err];
dispatch_async(dispatch_get_main_queue(),^{
// place the code here to update UI with your received response
[NSThread detachNewThreadSelector: @selector(StopActivityindicator) toTarget:self withObject:nil];
});
}
}
//Activity indicator Method to display
- (void) StartActivityindicator
{
mySpinner.hidden = NO;
[mySpinner startAnimating];
}
- (void) StopActivityindicator
{
mySpinner.hidden = YES;
[mySpinner stopAnimating];
}
