在发送POST请求时，我执行调试器从NSURLSessionDataTask跳跃和日志中生成的代码来休息基于URL IOS

Question

-(void)showData { 
NSError *error; 

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; 
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil]; 
NSURL *url = [NSURL URLWithString:@"https://public-api.wordpress.com/rest/v1.1/sites/en.blog.wordpress.com/posts"]; 
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url 
                 cachePolicy:NSURLRequestUseProtocolCachePolicy 
                timeoutInterval:60.0]; 

[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; 
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"]; 
[request setHTTPMethod:@"POST"]; 
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys: @"1", @"number",nil]; 
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error]; 
[request setHTTPBody:postData]; 


NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 

    if(error == nil) 
    { 
     NSString *text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding]; 
     NSLog(@"Data = %@",text); 
    } 




    NSLog(@"data is %@", data); 
    NSLog(@"response is %@" , response); 
}]; 
[postDataTask resume]; 
} 

nsurlsessiondatatask返回nil是__NSCFLocalDataTask：0x7ff061751960> {taskIdentifier：1} {悬浮}并且不NSData和NSResponse中的任何数据。

Answer 1

@interface UrClass:NsObject<NSURLConnectionDelegate>{ NSMutableData *_receivedData; 
} 

-(void)showData{ 
NSString * urlStr = [NSString stringWithFormat:@"%@", path]; 
    NSMutableURLRequest *theRequest = [[NSMutableURLRequest alloc] init]; 

    [theRequest setURL:[NSURL URLWithString:urlStr]]; 


     NSString *requestStr = [dictionary JSONRepresentation]; 
     NSData *requestData = [requestStr dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES]; 
     NSString *postLength = [NSString stringWithFormat:@"%d", (unsigned int)[requestData length]]; 
     [theRequest setValue:postLength forHTTPHeaderField:@"Content-Length"]; 
     [theRequest setHTTPBody:requestData]; 

     [theRequest addValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; 
    [theRequest setHTTPMethod:@"POST"]; 
    [theRequest setTimeoutInterval:REQUEST_TIME_OUT_SECS]; 

    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:NO]; 
    [theConnection scheduleInRunLoop:[NSRunLoop mainRunLoop] 
          forMode:NSDefaultRunLoopMode]; 

    [theConnection start]; 
    if (theConnection) 
     _receivedData = [NSMutableData data]; 
} 
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 
    [_receivedData setLength:0]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 
    [_receivedData appendData:data]; 
} 

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { 
} 

Answer 2

试试这个代码：

NSURL *url=[NSURL URLWithString:@"https://public-api.wordpress.com/rest/v1.1/sites/en.blog.wordpress.com/posts"]; 
NSData *contactData=[NSData dataWithContentsOfURL:url]; 
NSMutableArray *allContectData=[NSJSONSerialization JSONObjectWithData:contactData options:0 error:nil]; 
NSLog(@"%@",allContectData); 

否则使用此代码

-(void)showData{ 

    NSString *urlString = @"https://public-api.wordpress.com/rest/v1.1/sites/en.blog.wordpress.com/posts"; 
NSURL *url = [NSURL URLWithString:urlString]; 

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NO timeoutInterval:20.0f]; 
responseData = [[NSMutableData alloc] init]; 
connection = [NSURLConnection connectionWithRequest:request delegate:self]; 
} 

使用NSURLConnectionDataDelegate委托方法

-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 
    NSMutableArray *allContectData=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; 
    NSLog(@"%@",allContectData); 
} 

-(void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 
{ 
    NSLog(@"%@",error); 
}