//创建NSURL对象
NSURL *url = [NSURL URLWithString:@""]];
//创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@""]];
__block NSData *responseData = nil;
__block NSError *responseError = nil;
NSURLSession *session = [NSURLSession sharedSession];
dispatch_semaphore_t semaphore= dispatch_semaphore_create(0);
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
// ...
responseData = data;
responseError = error;
NSLog(@"-----%@",response);
dispatch_semaphore_signal(semaphore);
}];
[task resume];
dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
