自动将UIIMage中显示的照片保存到目录

Question

我想将照片保存在目录中。 但是，我在视图控制器中使用此代码创建了目录。

  NSArray *directoryNames = [NSArray arrayWithObjects:@"hats",@"bottoms",@"right",@"left",nil];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder

    for (int i = 0; i < [directoryNames count] ; i++) {
        NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:[directoryNames objectAtIndex:i]];
        if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
            [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; //Create folder

UIImage正在显示用户已拍摄的内容。 我想将照片自动显示在UIIMage上时保存到我创建的目录之一（例如帽子）中。下面是我的照片拍摄后显示到UIImage的代码。 是否有自动保存到目录之一的方法？

- (void) processImage:(UIImage *)image { //process captured image, crop, resize and rotate
    haveImage = YES;

    if([UIDevice currentDevice].userInterfaceIdiom==UIUserInterfaceIdiomPad) { //Device is ipad
        // Resize image
        UIGraphicsBeginImageContext(CGSizeMake(768, 1022));
        [image drawInRect: CGRectMake(0, 0, 768, 1022)];
        UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        CGRect cropRect = CGRectMake(0, 130, 768, 768);
        CGImageRef imageRef = CGImageCreateWithImageInRect([smallImage CGImage], cropRect);
        //or use the UIImage wherever you like

        [captureImage setImage:[UIImage imageWithCGImage:imageRef]];

        CGImageRelease(imageRef);

    }else{ //Device is iphone
        // Resize image
        UIGraphicsBeginImageContext(CGSizeMake(320, 426));
        [image drawInRect: CGRectMake(0, 0, 320, 426)];
        UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        CGRect cropRect = CGRectMake(0, 55, 320, 320);
        CGImageRef imageRef = CGImageCreateWithImageInRect([smallImage CGImage], cropRect);

        [captureImage setImage:[UIImage imageWithCGImage:imageRef]];

        CGImageRelease(imageRef);
    }

    //adjust image orientation based on device orientation
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft) {
        NSLog(@"landscape left image");

        [UIView beginAnimations:@"rotate" context:nil];
        [UIView setAnimationDuration:0.5];
        captureImage.transform = CGAffineTransformMakeRotation(DegreesToRadians(-90));
        [UIView commitAnimations];

    }
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight) {
        NSLog(@"landscape right");

        [UIView beginAnimations:@"rotate" context:nil];
        [UIView setAnimationDuration:0.5];
        captureImage.transform = CGAffineTransformMakeRotation(DegreesToRadians(90));
        [UIView commitAnimations];

    }
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) {
        NSLog(@"upside down");
        [UIView beginAnimations:@"rotate" context:nil];
        [UIView setAnimationDuration:0.5];
        captureImage.transform = CGAffineTransformMakeRotation(DegreesToRadians(180));
        [UIView commitAnimations];

    }
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait) {
        NSLog(@"upside upright");
        [UIView beginAnimations:@"rotate" context:nil];
        [UIView setAnimationDuration:0.5];
        captureImage.transform = CGAffineTransformMakeRotation(DegreesToRadians(0));
        [UIView commitAnimations];
    }
}







- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (IBAction)switchCamera:(id)sender { //switch cameras front and rear cameras
    if (cameraSwitch.selectedSegmentIndex == 0) {
        FrontCamera = YES;
        [self initializeCamera];
    }
    else {
        FrontCamera = NO;
        [self initializeCamera];
    }
}

Answer 1

您可能希望将其放在processImage:的底部processImage:

NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:directoryNames[2]]; // "right" is at index 2, per comments & code
NSString *filePath = [folderPath stringByAppendingPathComponent:@"IMAGE_NAME_HERE.PNG"]; // you maybe want to incorporate a timestamp into the name to avoid duplicates
NSData *imageData = UIImagePNGRepresentation(captureImage.image);
[imageData writeToFile:filePath atomically:YES];