Question

我想在我的应用程序中使用下面列出的两种目标c方法。第一种方法是将UIImagePicker照片上传到本地服务器。

// I would still like to use this method structure but with the `AVCam` classes.
-(void)uploadPhoto {
//upload the image and the title to the web service
[[API sharedInstance] commandWithParams:[NSMutableDictionary dictionaryWithObjectsAndKeys:@"upload", @"command", UIImageJPEGRepresentation(photo.image,70), @"file", fldTitle.text, @"title", nil] onCompletion:^(NSDictionary *json) {
    //completion
    if (![json objectForKey:@"error"]) {
        //success
        [[[UIAlertView alloc]initWithTitle:@"Success!" message:@"Your photo is uploaded" delegate:nil cancelButtonTitle:@"Yay!" otherButtonTitles: nil] show];

    } else {
        //error, check for expired session and if so - authorize the user
        NSString* errorMsg = [json objectForKey:@"error"];
        [UIAlertView error:errorMsg];
        if ([@"Authorization required" compare:errorMsg]==NSOrderedSame) {
            [self performSegueWithIdentifier:@"ShowLogin" sender:nil];
        }
    }
}];
}

我想添加第二种方法：第二种方法使用IBAction执行AVCam图片捕捉，但我将其更改为无效以使用[self snapStillImage]启动视图加载。

编辑

- (IBAction)snapStillImage:(id)sender
{
dispatch_async([self sessionQueue], ^{
    // Update the orientation on the still image output video connection before capturing.
    [[[self stillImageOutput] connectionWithMediaType:AVMediaTypeVideo] setVideoOrientation:[[(AVCaptureVideoPreviewLayer *)[[self previewView] layer] connection] videoOrientation]];
    // Flash set to Auto for Still Capture
    [ViewController5 setFlashMode:AVCaptureFlashModeAuto forDevice:[[self videoDeviceInput] device]];
    // Capture a still image.
    [[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:[[self stillImageOutput] connectionWithMediaType:AVMediaTypeVideo] completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
        if (imageDataSampleBuffer)
        {
            NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
            UIImage *image = [[UIImage alloc] initWithData:imageData];
            [[[ALAssetsLibrary alloc] init] writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:nil];
        //
          photo = [[UIImage alloc] initWithData:imageData];

        }
    }];
});
}

有人可以通过photo设置AVCam吗？至少幽默我，并开始就AVFoundation及其适当的课程进行对话，以解决这样的问题。

其他信息：avcam方法只是这个https://developer.apple.com/library/ios/samplecode/AVCam/Introduction/Intro.html

的摘录

@ Aksh1t我想设置一个UIImage命名图像，其中包含AVFoundation按钮的原始内容。不是UIImagePicker。以下是使用UIImagePicker设置插座的方法。

#pragma mark - Image picker delegate methods
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
// Resize the image from the camera
UIImage *scaledImage = [image resizedImageWithContentMode:UIViewContentModeScaleAspectFill bounds:CGSizeMake(photo.frame.size.width, photo.frame.size.height) interpolationQuality:kCGInterpolationHigh];
// Crop the image to a square (yikes, fancy!)
UIImage *croppedImage = [scaledImage croppedImage:CGRectMake((scaledImage.size.width -photo.frame.size.width)/2, (scaledImage.size.height -photo.frame.size.height)/2, photo.frame.size.width, photo.frame.size.height)];
// Show the photo on the screen
photo.image = croppedImage;
[picker dismissModalViewControllerAnimated:NO];
}

之后我只想使用我发布的第一种方法上传它。很抱歉不清楚。我基本上想在我的新应用程序中执行此操作（我不清楚应用程序是什么）。

使用AVCam
将该照片设为UIImageView IBOutlet命名照片
将照片（原始AVCam照片）上传到服务器

基本框架在上面，我将回答任何问题

Answer 1

snapStillImage方法中的以下代码行将照片放入imageData变量。

NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];

接下来，您将从此数据中创建一个UIImage对象，如此

UIImage *image = [[UIImage alloc] initWithData:imageData];

创建一个全局变量UIImage *photo;而不是上面的代码，并在imageData拍摄照片时使用snapStillImage初始化

photo = [[UIImage alloc] initWithData:imageData];

由于photo是一个全局变量，您可以在uploadPhoto方法中使用它并将其发送到您的服务器。

希望这会有所帮助，如果您有任何疑问，请将其留在评论中。

<小时/> 编辑：

由于您的文件中已有IBOutlet UIImageView *photo;，因此您甚至不需要全局变量来存储UIImage。您只需在snapStillImage方法中替换以下行：

UIImage *image = [[UIImage alloc] initWithData:imageData];

这一行

photo.image = [[UIImage alloc] initWithData:imageData];

如何上传这张照片？

1 个答案: