修改单张图片上传到服务器

#pragma mark - changeUserPhoto
- (void)changeUserPhoto {
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消"
                                               destructiveButtonTitle:nil otherButtonTitles:@"拍照",@"从手机相册选择", nil];
    actionSheet.tag = 120;
   
    [actionSheet showInView:self.view];
}


#pragma mark - actionSheet
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (actionSheet.tag == 120) {
        if (buttonIndex == 0) //拍照
        {
            [self takePhoto];
        }
        else if (buttonIndex == 1) //打开本地相册
        {
            [self openLocalPhoto];
        }
    }
}

#pragma mark - TakePhoto
/**
 *  开始拍照
 */
- (void)takePhoto
{
    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
   
    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
    {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = sourceType;
        [self presentViewController:picker animated:YES completion:nil];
    } else
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示"
                                                        message:@"抱歉，你的设备不支持该功能！"
                                                       delegate:self
                                              cancelButtonTitle:@"确定"
                                              otherButtonTitles:nil];
        [alert show];
        return;
    }
}

#pragma mark - openLibrary
// 打开本地相册

- (void)openLocalPhoto
{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.delegate  = self;
    picker.allowsEditing = YES;
    [self presentViewController:picker animated:YES completion:nil];
}

- (void) imagePickerController: (UIImagePickerController*) reader  didFinishPickingMediaWithInfo: (NSDictionary*) info {         NSString *strType = [info objectForKey:UIImagePickerControllerMediaType];         if ([strType isEqualToString:@"public.image"]) //当选择的类型是图片         {             UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"]; //先把图片转成NSData             NSLog(@"image = %@", image);             [reader dismissViewControllerAnimated:YES completion:nil]; //关闭相册界面             //压缩图片             UIImage *scalImage = [self scaleFromImage:image];             imageView.image = scalImage;             //保存到本地           NSString *strfileName = [self saveImage:scalImage];             //上传头像             NSString *strUrl = [NSString stringWithFormat:@"%@", @"http://192.168.1.108:8080/resources/user/"];             strUrl = [strUrl stringByAppendingString:@"headimg/"];             strUrl = [strUrl stringByAppendingString:@"13061622013"];             NSURL *url = [NSURL URLWithString:strUrl];             ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];             [request setDelegate:self];                         [request addRequestHeader:@"Content-Type" value:@"application/json; encoding=utf-8"];             [request addRequestHeader:@"Accept" value:@"application/json"];             [request setFile:strfileName forKey:@"headImg"];             [request setRequestMethod:@"POST"];                         [request setDidFailSelector:@selector(ASIFormDataRequestFailed:)];             [request setDidFinishSelector:@selector(ASIFormDataRequestSuceed:)];             [request startAsynchronous];         } } #pragma mark - savaImage// 保存图像 - (NSString *)saveImage:(UIImage*)image {     NSData *data;         if (UIImagePNGRepresentation(image) == nil)     {         data = UIImageJPEGRepresentation(image, 1.0);     }     else     {         data = UIImagePNGRepresentation(image);     }         NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];     NSString *filePath = [docPath stringByAppendingPathComponent:@"tianImage.png"];     BOOL result = [data writeToFile:filePath atomically:YES];     if (result) {         NSLog(@"写入成功");     }     return filePath; }#pragma mark - scalePhoto// 图像压缩 - (UIImage *)scaleFromImage:(UIImage *)image {     if (!image)     {         return nil;     }         NSData *data = UIImagePNGRepresentation(image);     CGFloat dataSize = data.length/1024;     CGFloat width  = image.size.width;     CGFloat height = image.size.height;     CGSize size;         if (dataSize<=50) //小于50k     {         return image;     }     else if (dataSize<=100) //小于100k     {         size = CGSizeMake(width/2.f, height/2.f);     }     else if (dataSize<=200) //小于200k     {         size = CGSizeMake(width/4.f, height/4.f);     }     else if (dataSize<=500) //小于500k     {         size = CGSizeMake(width/4.f, height/4.f);     }     else if (dataSize<=1000) //小于1M     {         size = CGSizeMake(width/6.f, height/6.f);     }     else if (dataSize<=2000) //小于2M     {         size = CGSizeMake(width/10.f, height/10.f);     }     else //大于2M     {         size = CGSizeMake(width/12.f, height/12.f);     }         UIGraphicsBeginImageContext(size);     [image drawInRect:CGRectMake(0, 0, size.width, size.height)];     UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();     UIGraphicsEndImageContext();     if (!newImage)     {         return image;     }     return newImage; } #pragma mark - ASIHTTPRequestDelegate - (void)ASIFormDataRequestSuceed:(ASIFormDataRequest *)request {     } - (void)ASIFormDataRequestFailed:(ASIFormDataRequest *)request {     NSError *error = [request error];     NSLog(@"error:%@",error);

}