第一步，继承AFNetWorking 最新的库
点击下载AFNetWorking第二步，新建一个类，我们称之为NetWorkTool，继承NSObject
请求方法
声明：
/**
* 发送一个post请求
*
* @param url 请求路径
* @param params 请求参数
* @param success 请求成功后的回调
* @param failure 请求失败后的回调
*/
+ (void)postWithURL:(NSString *)url params:(NSDictionary *)params
success:(void(^)(id responseObject))success
failure:(void(^)(NSError *error))failure;实现：
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager POST:url parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
if (success) {
NSData *data = [[NSData alloc]initWithData:[operation.responseString dataUsingEncoding:NSUTF8StringEncoding]];
id dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
success(dic);
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
if (failure) {
failure(error);
}
}];
上传图片
这里我们imageArr数组保存的应当是UIImage对象
声明：
+ (void)upLoadImageWithOption:(NSDictionary *)para withInferface:(NSString *)requestURL imageArr:(NSArray*)imageArr uploadSuccess:(void (^)(AFHTTPRequestOperation *, id))success uoloadFailure:(void (^)(AFHTTPRequestOperation *, NSError *))failure progress:(void (^)(float))progress实现：
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *requset = [serializer multipartFormRequestWithMethod:@"POST" URLString:requestURL parameters:para constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
NSInteger i = 0;
//此处循环是为了将UIImage对象进行压缩。可不处理直接转为二进制data即可。
for(UIImage *image in imageArr)
{
UIImage *newImage = [VTGeneralTool imageCompressForWidth:image targetWidth:640];
NSData *imageData = UIImagePNGRepresentation(newImage);
[formData appendPartWithFileData:imageData name:[NSString stringWithFormat:@"picfile%ld",(long)i] fileName:@"image.png" mimeType:@"image/jpeg"];
i++;
}
} error:nil];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/plain"];
AFHTTPRequestOperation *operation = [manager HTTPRequestOperationWithRequest:requset success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];
success(operation,dict);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
failure(operation,error);
}];
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
CGFloat xx = totalBytesExpectedToWrite;
CGFloat yy = totalBytesWritten;
CGFloat pro = yy/xx;
progress(pro);
}];
[operation start];音视频上传
方法类似图片上传，都是以文件流形式进行传输。
这里对视频上传进行了举列。音频上传不再累述。
声明：
+ (void)upLoadVideoWithOption:(NSDictionary *)para withInferface:(NSString *)requestURL videoPath:(NSURL *)videoURL uploadSuccess:(void (^)(AFHTTPRequestOperation * , id))success uoloadFailure:(void (^)(AFHTTPRequestOperation *, NSError *))failure progress:(void (^)(float))progress实现：
//此处为对视频进行转码并且压缩为，最终输出为MP4的格式
//输出后将文件保存到了/Library/Caches/文件夹内
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:videoURL options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"];
NSString *mp4Path = [NSHomeDirectory() stringByAppendingFormat:@"/Library/Caches/output-%@.mp4", [formater stringFromDate:[NSDate date]]];
exportSession.outputURL = [NSURL fileURLWithPath: mp4Path];
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) {
case AVAssetExportSessionStatusFailed:
{
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"错误"
message:[[exportSession error] localizedDescription]
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[alert show];
break;
}
case AVAssetExportSessionStatusCancelled:
break;
case AVAssetExportSessionStatusCompleted:
{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
//text/plain
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/plain"];
AFHTTPRequestOperation *opera = [manager POST:requestURL parameters:para constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
NSData *videoData = [NSData dataWithContentsOfFile:mp4Path];
[formData appendPartWithFileData:videoData name:@"video000" fileName:@"video000.mp4" mimeType:@"video/mpeg4"];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];
success(operation,dict);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
failure (operation,error);
}];
[opera setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
CGFloat xx = totalBytesExpectedToWrite;
CGFloat yy = totalBytesWritten;
CGFloat pro = yy/xx;
progress(pro);
}];
[opera start];
break;
}
default:
break;
}
}];文件下载
声明：
+ (void)downloadFileWithOption:(NSDictionary *)paramDic
withInferface:(NSString*)requestURL
savedPath:(NSString*)savedPath
downloadSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
downloadFailure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
progress:(void (^)(float progress))progress实现：
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request =[serializer requestWithMethod:@"POST" URLString:requestURL parameters:paramDic error:nil];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:savedPath append:NO]];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
float p = (float)totalBytesRead / totalBytesExpectedToRead;
progress(p);
// NSLog(@"download：%f", (float)totalBytesRead / totalBytesExpectedToRead);
//下载进度
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
success(operation,responseObject);
NSLog(@"下载成功");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
success(operation,error);
NSLog(@"下载失败");
}];
[operation start];第三步：调用
^.^ 直接调用其他：
图片压缩的方法
+ (UIImage *) imageCompressForWidth:(UIImage *)sourceImage targetWidth:(CGFloat)defineWidth
{
UIImage *newImage = nil;
CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat targetWidth = defineWidth;
CGFloat targetHeight = height / (width / targetWidth);
CGSize size = CGSizeMake(targetWidth, targetHeight);
CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;
CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);
if(CGSizeEqualToSize(imageSize, size) == NO){
CGFloat widthFactor = targetWidth / width;
CGFloat heightFactor = targetHeight / height;
if(widthFactor > heightFactor){
scaleFactor = widthFactor;
}
else{
scaleFactor = heightFactor;
}
scaledWidth = width * scaleFactor;
scaledHeight = height * scaleFactor;
if(widthFactor > heightFactor){
thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
}else if(widthFactor < heightFactor){
thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
}
}
UIGraphicsBeginImageContext(size);
CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width = scaledWidth;
thumbnailRect.size.height = scaledHeight;
[sourceImage drawInRect:thumbnailRect];
newImage = UIGraphicsGetImageFromCurrentImageContext();
if(newImage == nil){
NSLog(@"scale image fail");
}
UIGraphicsEndImageContext();
return newImage;
}文／五阿哥永琪（简书作者）
原文链接：http://www.jianshu.com/p/2919c0ddda49
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。