AF上传图片

第一步遵守协议

//UIImagePickerControllerDelegate调用当前设备的相机功能
//UINavigationControllerDelegate一同使用，才能调用相机功能成功（拍照，录像，相册）

UIImagePickerControllerDelegate,UINavigationControllerDelegate

第二步导入第三方库#import "AFHTTPRequestOperationManager.h"

  //调用相机类 
    UIImagePickerController * picker;

第三步：单击ActionSheet按钮调用该方法

//点击ActionSheet按钮跳转到相册页面
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 3)
    {
         //调用设备相册
        //<1>创建设备相机对象
        picker = [[UIImagePickerController alloc]init];
        //<2>设置相机资源的样式
        /*
         UIImagePickerControllerSourceTypePhotoLibrary,  图片库
         UIImagePickerControllerSourceTypeCamera,  相机
         UIImagePickerControllerSourceTypeSavedPhotosAlbum  相册
         */
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        //<3>设置picker的代理
        picker.delegate = self;
        //<4>跳转到相册页面
        [self presentViewController:picker animated:YES completion:nil];
    }
}

第四步：（选中相册中的照片时）调用该方法

//选中图片就会调用以下方法----------UIImagePickControllerDelegate协议中的方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    //<1>获取选中的图片
    UIImage * selectImage = [info objectForKey:UIImagePickerControllerOriginalImage];
    //图片上传传递是图片的NSData数据
    //<2>将UIImage 转成NSNata
    //真正开发中图片都是png图片
    NSData * imageData = UIImagePNGRepresentation(selectImage);
    //拓展
    //NSData imageJPGData = UIImageJPEGRepresentation(转换图片的对象原始指针, 图片的缩放比例);
    //<3>上传图片
    AFHTTPRequestOperationManager * manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
    //封装请求体(也就是参数和参数值)
    NSMutableDictionary * dic = [[NSMutableDictionary alloc]init];
    [dic setObject:self.album_token forKey:@"m_auth"];
    [dic setObject:[NSNumber numberWithInt:0] forKey:@"albumid"];
    [dic setObject:@"image" forKey:@"pic_title"];
    [manager POST:UPLOADPATH parameters:dic constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        //对请求体进行拼接
        /*
             1、图片的NSData类型的对象指针
             2、接口的参数名
             3、图片的名称   随意   图片名称不能是中文  后缀如果是jepg也可以写png
             4、typt  值固定， 只要是图片就这么写
         */
        [formData appendPartWithFileData:imageData name:@"attach" fileName:@"hello.png" mimeType:@"image/png"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSString * message = [responseObject objectForKey:@"message"];
        NSLog(@"%@",message);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"error:%@",error.description);
    }];
    [self dismissViewControllerAnimated:YES completion:nil];
    
}

最后上传成功。