AFNetworking 基本使用

GET 用法

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; 

[manager GET:URL parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {  

}     
 success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {  

 NSLog(@"这里打印请求成功要做的事");  

}

failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull   error) {  

NSLog(@"%@",error);  //这里打印错误信息

}];

POST 用法

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];


NSMutableDictionary *parameters = @{@"":@"",@"":@""};

[manager POST:URL parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {
    
    
} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
    
    
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

}];

文件上传

/**
 *  AFN 3.0 上传
 *      有两种方式
 *          upLoad1 和 upLoad2
 */

//第一种方法是通过工程中的文件进行上传
- (void)upLoad1{

    //1。创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

    //2.上传文件
    NSDictionary *dict = @{@"username":@"1234"};
    
    NSString *urlString = @"22222";
    [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        //上传文件参数
        UIImage *iamge = [UIImage imageNamed:@"123.png"];
        NSData *data = UIImagePNGRepresentation(iamge);
        //这个就是参数
        [formData appendPartWithFileData:data name:@"file" fileName:@"123.png" mimeType:@"image/png"];
        
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        
        //打印下上传进度
        WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        
        //请求成功
        WKNSLog(@"请求成功：%@",responseObject);
    
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        
        //请求失败
        WKNSLog(@"请求失败：%@",error);
    }];

}

//第二种是通过URL来获取路径，进入沙盒或者系统相册等等
- (void)upLoda2{
    //1.创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.上传文件
    NSDictionary *dict = @{@"username":@"1234"};
    
    NSString *urlString = @"22222";
    [manager POST:urlString parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"文件地址"] name:@"file" fileName:@"1234.png" mimeType:@"application/octet-stream" error:nil];
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        
        //打印下上传进度
        WKNSLog(@"%lf",1.0 *uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        
        //请求成功
        WKNSLog(@"请求成功：%@",responseObject);
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        
        //请求失败
        WKNSLog(@"请求失败：%@",error);
    }];
}

文件下载

/**
 *  AFN3.0 下载
 */
- (void)downLoad{

    //1.创建管理者对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    //2.确定请求的URL地址
    NSURL *url = [NSURL URLWithString:@""];
    
    //3.创建请求对象
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    //下载任务
    NSURLSessionDownloadTask *task = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
        //打印下下载进度
        WKNSLog(@"%lf",1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount);
        
    } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
        //下载地址
        WKNSLog(@"默认下载地址:%@",targetPath);
        
        //设置下载路径，通过沙盒获取缓存地址，最后返回NSURL对象
        NSString *filePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
        return [NSURL fileURLWithPath:filePath];
        
        
    } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
        
        //下载完成调用的方法
        WKNSLog(@"下载完成：");
        WKNSLog(@"%@--%@",response,filePath);
        
    }];
    
    //开始启动任务
    [task resume];

}

参考

• https://juejin.im/entry/589d1aa161ff4b006b37408e