AFNetworking

上传

单图片上传

- (void)uploadimgWithurl:(NSString *)urlStr image:(UIImage *)image fileName:(NSString *)fileName success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    //需要传递的参数,jason格式
    NSDictionary *parameter = @{@"Driverid": @"10000"};
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager POST:urlStr parameters:parameter constructingBodyWithBlock:^(id formData) {
        /*文件命名参考代码
         // 在网络开发中，上传文件时，是文件不允许被覆盖，文件重名
         // 要解决此问题，
         // 可以在上传时使用当前的系统事件作为文件名
         NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
         // 设置时间格式
         formatter.dateFormat = @"yyyyMMddHHmmss";
         NSString *str = [formatter stringFromDate:[NSDate date]];
         NSString *newfileName = [NSString stringWithFormat:@"%@.png", str];
         */
        [formData appendPartWithFileData:UIImagePNGRepresentation(image) name:@"file" fileName:fileName mimeType:@"image/png"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (success) {
            //NSLog(@"success\n");
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (fail) {
            //NSLog(@"fail\n");
            fail();
        }
    }];
}

多文件上传

- (void)uploadMutableimgWithurl:(NSString *)urlStr imagearray:(NSMutableArray *)imgarray success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    //需要传递的参数,jason格式
    NSDictionary *parameter = @{@"Driverid": @"10000"};
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager POST:urlStr parameters:parameter constructingBodyWithBlock:^(id formData) {
        /*文件命名参考代码
         // 在网络开发中，上传文件时，是文件不允许被覆盖，文件重名
         // 要解决此问题，
         // 可以在上传时使用当前的系统事件作为文件名
         NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
         // 设置时间格式
         formatter.dateFormat = @"yyyyMMddHHmmss";
         NSString *str = [formatter stringFromDate:[NSDate date]];
         NSString *newfileName = [NSString stringWithFormat:@"%@.png", str];
         */
        for (int i=0; i<[imgarray count]; i++) {
            [formData appendPartWithFileData:UIImagePNGRepresentation([imgarray objectAtIndex:i]) name:[NSString stringWithFormat:@"file%d",i ] fileName:[NSString stringWithFormat:@"pic%d.png",i] mimeType:@"image/png"];
        }
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (success) {
            //NSLog(@"success\n");
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (fail) {
            //NSLog(@"fail\n");
            fail();
        }
    }];
}

下载

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
// 1. 创建会话管理者
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
    
// 2. 创建下载路径和请求对象
NSURL *URL = [NSURL URLWithString:@"http://dldir1.qq.com/qqfile/QQforMac/QQ_V5.4.0.dmg"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
    
// 3.创建下载任务
/**
 * 第一个参数 - request：请求对象
 * 第二个参数 - progress：下载进度block
 *      其中： downloadProgress.completedUnitCount：已经完成的大小
 *            downloadProgress.totalUnitCount：文件的总大小
 * 第三个参数 - destination：自动完成文件剪切操作
 *      其中： 返回值:该文件应该被剪切到哪里
 *            targetPath：临时路径 tmp NSURL
 *            response：响应头
 * 第四个参数 - completionHandler：下载完成回调
 *      其中： filePath：真实路径 == 第三个参数的返回值
 *            error:错误信息
 */
NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:^(NSProgress *downloadProgress) {
        
    // 下载进度
    self.progressView.progress = 1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount;
    self.progressLabel.text = [NSString stringWithFormat:@"当前下载进度:%.2f%%",100.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount];
        
} destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
        
    NSURL *path = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
    return [path URLByAppendingPathComponent:@"QQ_V5.4.0.dmg"]; 
      
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {        
    NSLog(@"File downloaded to: %@", filePath);
}];

// 4. 开启下载任务
[downloadTask resume];

AFNetworking 断点下载

@interface ViewController ()

/** 下载进度条 */
@property (weak, nonatomic) IBOutlet UIProgressView *progressView;
/** 下载进度条Label */
@property (weak, nonatomic) IBOutlet UILabel *progressLabel;

/** AFNetworking断点下载（支持离线）需用到的属性 **********/
/** 文件的总长度 */
@property (nonatomic, assign) NSInteger fileLength;
/** 当前下载长度 */
@property (nonatomic, assign) NSInteger currentLength;
/** 文件句柄对象 */
@property (nonatomic, strong) NSFileHandle *fileHandle;

/** 下载任务 */
@property (nonatomic, strong) NSURLSessionDataTask *downloadTask;
/* AFURLSessionManager */
@property (nonatomic, strong) AFURLSessionManager *manager;

@end

/**
 * manager的懒加载
 */
- (AFURLSessionManager *)manager {
    if (!_manager) {
        NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
        // 1. 创建会话管理者
        _manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
    }
    return _manager;
}

/**
 * downloadTask的懒加载
 */
- (NSURLSessionDataTask *)downloadTask {
    if (!_downloadTask) {
        // 创建下载URL
        NSURL *url = [NSURL URLWithString:@"http://dldir1.qq.com/qqfile/QQforMac/QQ_V5.4.0.dmg"];
        
        // 2.创建request请求
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
        
        // 设置HTTP请求头中的Range
        NSString *range = [NSString stringWithFormat:@"bytes=%zd-", self.currentLength];
        [request setValue:range forHTTPHeaderField:@"Range"];
        
        __weak typeof(self) weakSelf = self;
        _downloadTask = [self.manager dataTaskWithRequest:request completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
            NSLog(@"dataTaskWithRequest");
            
            // 清空长度
            weakSelf.currentLength = 0;
            weakSelf.fileLength = 0;
            
            // 关闭fileHandle
            [weakSelf.fileHandle closeFile];
            weakSelf.fileHandle = nil;
            
        }];
        
        [self.manager setDataTaskDidReceiveResponseBlock:^NSURLSessionResponseDisposition(NSURLSession * _Nonnull session, NSURLSessionDataTask * _Nonnull dataTask, NSURLResponse * _Nonnull response) {
            NSLog(@"NSURLSessionResponseDisposition");
            
            // 获得下载文件的总长度：请求下载的文件长度 + 当前已经下载的文件长度
            weakSelf.fileLength = response.expectedContentLength + self.currentLength;
            
            // 沙盒文件路径
            NSString *path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"QQ_V5.4.0.dmg"];
            
            NSLog(@"File downloaded to: %@",path);
            
            // 创建一个空的文件到沙盒中
            NSFileManager *manager = [NSFileManager defaultManager];
            
            if (![manager fileExistsAtPath:path]) {
                // 如果没有下载文件的话，就创建一个文件。如果有下载文件的话，则不用重新创建(不然会覆盖掉之前的文件)
                [manager createFileAtPath:path contents:nil attributes:nil];
            }
            
            // 创建文件句柄
            weakSelf.fileHandle = [NSFileHandle fileHandleForWritingAtPath:path];
            
            // 允许处理服务器的响应，才会继续接收服务器返回的数据
            return NSURLSessionResponseAllow;
        }];
        
        [self.manager setDataTaskDidReceiveDataBlock:^(NSURLSession * _Nonnull session, NSURLSessionDataTask * _Nonnull dataTask, NSData * _Nonnull data) {
            NSLog(@"setDataTaskDidReceiveDataBlock");
            
            // 指定数据的写入位置 -- 文件内容的最后面
            [weakSelf.fileHandle seekToEndOfFile];
            
            // 向沙盒写入数据
            [weakSelf.fileHandle writeData:data];
            
            // 拼接文件总长度
            weakSelf.currentLength += data.length;
            
            // 获取主线程，不然无法正确显示进度。
            NSOperationQueue* mainQueue = [NSOperationQueue mainQueue];
            [mainQueue addOperationWithBlock:^{
                // 下载进度
                if (weakSelf.fileLength == 0) {
                    weakSelf.progressView.progress = 0.0;
                    weakSelf.progressLabel.text = [NSString stringWithFormat:@"当前下载进度:00.00%%"];
                } else {
                    weakSelf.progressView.progress =  1.0 * weakSelf.currentLength / weakSelf.fileLength;
                    weakSelf.progressLabel.text = [NSString stringWithFormat:@"当前下载进度:%.2f%%",100.0 * weakSelf.currentLength / weakSelf.fileLength];
                }
               
            }];
        }];
    }
    return _downloadTask;
}

/**
 * 点击按钮 -- 使用AFNetworking断点下载（支持离线）
 */
- (IBAction)OfflinResumeDownloadBtnClicked:(UIButton *)sender {
    // 按钮状态取反
    sender.selected = !sender.isSelected;
    
    if (sender.selected) { // [开始下载/继续下载]
        // 沙盒文件路径
        NSString *path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"QQ_V5.4.0.dmg"];
        
        NSInteger currentLength = [self fileLengthForPath:path];
        if (currentLength > 0) {  // [继续下载]
            self.currentLength = currentLength;
        }
        
        [self.downloadTask resume];
        
    } else {
        [self.downloadTask suspend];
        self.downloadTask = nil;
    }
}

/**
 * 获取已下载的文件大小
 */
- (NSInteger)fileLengthForPath:(NSString *)path {
    NSInteger fileLength = 0;
    NSFileManager *fileManager = [[NSFileManager alloc] init]; // default is not thread safe
    if ([fileManager fileExistsAtPath:path]) {
        NSError *error = nil;
        NSDictionary *fileDict = [fileManager attributesOfItemAtPath:path error:&error];
        if (!error && fileDict) {
            fileLength = [fileDict fileSize];
        }
    }
    return fileLength;
}