oc网络请求POST

- (void)netPOST {

NSString *stringUrl = [NSString stringWithFormat:@""];

NSURL *url = [NSURL URLWithString:stringUrl];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

request.timeoutInterval = 5.0;

request.HTTPMethod = @"POST";

NSString *bodyString = [NSString stringWithFormat:@"key=123456789"]; //带一个参数key传给服务器

request.HTTPBody = [bodyString dataUsingEncoding:NSUTF8StringEncoding];

NSURLSession *session = [NSURLSession sharedSession];

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

// 数据解析...

}] resume];

}