難得一次備注相當詳細的原生GET網絡請求操作,強迫症一樣記錄下來和大家分享… 也備復制用

-(void)getResult{

    _MB = [MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES];

    //接口路徑
    NSString *path = @"http://a.apix.cn/apixlife/phone/phone";

    //路徑-+參數
    NSString *pathWithPhoneNum = [NSString stringWithFormat:@"%@?phone=%@",path,_phoneNumFD.text];

    //中文編碼
    NSString *urlPath = [pathWithPhoneNum stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];

    //URL
    NSURL *phoneURL = [NSURL URLWithString:urlPath];

    //請求對象
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:phoneURL];

    //請求方式
    [request setHTTPMethod:@"GET"];

    //請求頭
    [request setValue:@"92b5787ecd17417b718a2aaedc7e6ce8" forHTTPHeaderField:@"apix-key"];

    //網絡配置
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

    //網絡會話
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];

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

        //回到主線程更新UI -> 撤銷遮罩
        dispatch_async(dispatch_get_main_queue(), ^{
            [_MB hide:YES];
        });

        if (error) {
            NSLog(@"請求失敗... %@",error);

            //提示用戶請求失敗!
            UIAlertController *AV = [UIAlertController alertControllerWithTitle:@"提示" message:@"抱歉,服務器錯誤,請稍後重試..." preferredStyle:UIAlertControllerStyleActionSheet];
            [AV addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                //點擊OK,進行相應操作,可置nil
                NSLog(@"您點擊了OK..");
            }]];
            [self presentViewController:AV animated:YES completion:nil];

        }else{
            //JSON 解析 蘋果原生效率最高
            NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
            if ([[result objectForKey:@"message"] isEqualToString:@"success"]) {
                //獲取數據->主線程更新UI
                dispatch_async(dispatch_get_main_queue(), ^{
                    NSDictionary *data = [result objectForKey:@"data"];
                    NSString *city = [data objectForKey:@"city"];
                    NSString *province = [data objectForKey:@"province"];
                    NSString *belong = [NSString stringWithFormat:@"%@ · %@",province,city];
                    [_resultLB setText:belong];
                });
            }else{
                NSLog(@"未查到信息....");
            }
            NSLog(@"請求成功... %@",result);
        }
    }];

    //開始任務
    [sessionTask resume];
}