iOS开发之上传图片

ios开发中有时候会遇到图片的上传功能，比如上传用户的头像。当然也需要获取相册或者调用相机拍照，本文只是讲解上传头像，后期再奉上获取相册（相机）的代码。作者用的AFN，当然大家也可以尝试原生的方法发送上传请求。

//把图片转换成二进制,才能传输NSData *imageData=UIImagePNGRepresentation(_imgView.image);//创建managerAFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];manager.responseSerializer.acceptableContentTypes=[NSSet setWithObject:@"text/plain"];manager.requestSerializer = [AFHTTPRequestSerializer serializer];manager.responseSerializer=[AFHTTPResponseSerializer serializer];//参数NSUserDefaults *df = [NSUserDefaults standardUserDefaults];NSString *userid = [df stringForKey:@"USERID"];NSString *usercode = [df stringForKey:@"USERCODE"];NSString *photoName = @"aaa.png";NSMutableDictionary *param = [[NSMutableDictionary dictionary];[param setObject:userid forKey:@"userid"];[param setObject:usercode forKey:@"usercode"];[param setObject:photoName forKey:@"photoName"];//服务器地址                           NSString *Url = @"http://haha.comn/UserApp!editPhoto.action?";//上传图片[manager POST:Url parameters:param constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {   [formData appendPartWithFileData:imageData name:@"fileData" fileName:@"lyy.png" mimeType:@"image/png"];//上传的参数,可以随意起名} success:^(AFHTTPRequestOperation *operation, id responseObject) {//上传成功    NSString *Str=[[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];    NSLog(@"str=%@",Str);//或者用（根据工作中需要哪类，可以尝试一下，两者打印的效果）    NSData *data = operation.responseData;    NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:[NSJSONReadingMutableContainers error:nil];]    NSLog(@"dict=%@",dict);} failure:^(AFHTTPRequestOperation *operation, NSError *error) {    NSLog(@"上传失败");}];