Question

我想在目录中保存照片。但是我在视图控制器中使用此代码创建了名为hats bottomoms的目录。

  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正在显示用户在相机中拍摄的内容。我希望将照片自动保存到我在UIIMage上显示的目录之一（例如帽子）.Below是我拍摄照片后显示给UIImage的代码。有没有自动保存到其中一个目录？我无法将您保存到特定目录的地方。

- (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];
    }
}

的更新

    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];

Answer 1

自动保存只是在不明确询问用户是否应该保存的情况下保存。保存图像的过程完全相同：

获取UIImage
转换为数据（使用UIImageJpegRepresentation或UIImagePngRepresentation）
保存数据（使用writeToFile:atomically:）

类似的东西：

folderPath = [documentsDirectory stringByAppendingPathComponent:directoryNames[0]];

或

folderPath = [documentsDirectory stringByAppendingPathComponent:@"hats"];

将照片保存到特定目录

1 个答案: