AFNetworking學習的那些事（一）

首先把我封裝的session請求獻上

1.BaseRequest.h

//網絡請求的基類
// POST 、 GET 、 DELETE、PUT、HEADER、TRACE、 OPTION

@interface BaseRequest : NSObject
//POST請求方法

+(void)postWithURL:(NSString *)url para:(NSDictionary *)para callBack: (void (^)(NSData* data, NSError* error))callBack;

// 提示名: (參數類型)參數名
+(void)getWithURL: (NSString *)url para:(NSDictionary *)para callBack: (void (^)(NSData* data, NSError* error))callBack;

//DELETE 類似于GET     PUT類似于POST

@end
           

BaseRequest.m

+(void)postWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void (^)(NSData *, NSError *))callBack {
    //拼接url的IP位址，資源路徑、資源參數
    NSMutableString *urlStr = [[NSMutableString alloc]initWithString:url];

    [urlStr appendString: [self paraToString:para]];

    NSURL *URL = [NSURL URLWithString:urlStr];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
    request.HTTPMethod = @"POST";

    //當請求的資源參數資料過大，不能放在資源參數部分時，或者為了不暴露接口的API将相關的請求參數放到請求體中。
    request.HTTPBody = [NSJSONSerialization dataWithJSONObject:para options:NSJSONWritingPrettyPrinted error:nil];          //傳回值為NSData
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        //請求響應的回調 block
        if (!error) {
            callBack(data,error);
//            NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
        }
    }];

    [task resume];
}


+(void)getWithURL:(NSString *)url para:(NSDictionary *)para callBack:(void (^)(NSData *, NSError *))callBack {
    //拼接url的IP位址，資源路徑、資源參數
    NSMutableString *urlStr = [[NSMutableString alloc]initWithString:url];

    [urlStr appendString: [self paraToString:para]];

    NSURL *URL = [NSURL URLWithString:urlStr];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
    request.HTTPMethod = @"GET";

    //當請求的資源參數資料過大，不能放在資源參數部分時，或者為了不暴露接口的API将相關的請求參數放到請求體中。
    request.HTTPBody = [NSJSONSerialization dataWithJSONObject:para options:NSJSONWritingPrettyPrinted error:nil];          //傳回值為NSData
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        //請求響應的回調 block
        if (!error) {
            callBack(data,error);
//            NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
        }
    }];

    [task resume];
}


//将para字典拼接為資源參數部分
+(NSString *)paraToString: (NSDictionary *)para {
    NSMutableString *str = [NSMutableString stringWithString:@"?"];

    for (NSString *key in para.allKeys) {
        [str appendFormat:@"%@=%@&",key,para[key]];
    }
    if ([str hasSuffix:@"&"]){
        //删除多餘的& 連接配接符
        [str deleteCharactersInRange:NSMakeRange(str.length - , )];
    }

    //如果資源中含有中文或其他等特殊字元時進行Unicode編碼
    NSString *paraStr = [str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];
    return paraStr;
}

@end
           

str的列印結果 是這樣，并經過json轉化

{

“result”: {

“areaid”: “410611”,

“email”: “[email protected]”,

“id”: 35,

“loginflag”: “1”,

“mobile”: “”,

“name”: “互動體驗中心”,

“phone”: “”,

“photo”: “http://biot.365960.cn/image/user/35/1483577527069.png“,

“remarks”: “”,

“roleid”: “9”,

“usertype”: “2”

},

“code”: 0,

“message”: “登入成功”,

“error”: false

}

列印的經過NSJSONSerialization 解析的 為 NSDictionary對象類型

{

code = 0;

error = 0;

message = “\U767b\U5f55\U6210\U529f”;

result = {

areaid = 410611;

email = “[email protected]”;

id = 35;

loginflag = 1;

mobile = “”;

name = “\U4e92\U52a8\U4f53\U9a8c\U4e2d\U5fc3”;

phone = “”;

photo = “http://biot.365960.cn/image/user/35/1483577527069.png“;

remarks = “”;

roleid = 9;

usertype = 2;

};

}

不同之處在于 後者的非數字型鍵值沒有雙引号，不能進行json轉化

通過AFN來擷取資料

在這裡我們列印的 AFN傳回的資料responseObject，列印結果

{

code = 0;

error = 0;

message = “\U767b\U5f55\U6210\U529f”;

result = {

areaid = 410611;

email = “[email protected]”;

id = 35;

loginflag = 1;

mobile = “”;

name = “\U4e92\U52a8\U4f53\U9a8c\U4e2d\U5fc3”;

phone = “”;

photo = “http://biot.365960.cn/image/user/35/1483577527069.png“;

remarks = “”;

roleid = 9;

usertype = 2;

};

}

那麼這邊同上邊列印NSDictionary的結果，是以

AFN網絡請求方法中傳回的responseObject 為 已經轉化成為NSDictionary 或 NSArray的對象， 省了 一步将請求下來的data轉化為NSDictionary 或 NSArray！