我想要的东西:https://imgur.com/zE6kgb1
我取得的成就:https://imgur.com/8Ylq5yp
下面是我正在使用的功能:
- (void) showViewWithImageFromAsset: (PHAsset *) asset
{
UIView *imageContainer = [[UIView alloc] initWithFrame:CGRectMake(25, 320, 400, 400)];
[imageContainer setBackgroundColor:[UIColor whiteColor]];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 250, 200)];
CGFloat shadowRadius = 0.0;
CGFloat width = imageView.frame.size.width;
CGFloat height = imageView.frame.size.height; // Get width and height of the view
// Plot the path
UIBezierPath *shadowPath = [[UIBezierPath alloc] init];
[shadowPath moveToPoint:CGPointMake(width, 0)];
[shadowPath addLineToPoint:CGPointMake((width)+10, 10)];
[shadowPath addLineToPoint:CGPointMake((width)+10, height-10)];
[shadowPath addLineToPoint:CGPointMake(width, height)];
imageView.layer.shadowColor = UIColor.blackColor.CGColor;
imageView.layer.shadowPath = shadowPath.CGPath;
imageView.layer.shadowRadius = shadowRadius;
imageView.layer.shadowOffset = CGSizeZero;
imageView.layer.shadowOpacity = 1.0;
PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
requestOptions.resizeMode = PHImageRequestOptionsResizeModeExact;
requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
requestOptions.synchronous = YES;
PHImageManager *manager = [PHImageManager defaultManager];
// assets contains PHAsset objects.
__block UIImage *ima;
[manager requestImageForAsset:asset
targetSize:PHImageManagerMaximumSize
contentMode:PHImageContentModeDefault
options:requestOptions
resultHandler:^void(UIImage *image, NSDictionary *info) {
ima = image;
dispatch_async(dispatch_get_main_queue(), ^{
[imageView setImage:ima];
CATransform3D t = CATransform3DIdentity;
t.m34 = .005;
imageContainer.layer.sublayerTransform = t;
imageView.layer.transform = CATransform3DMakeRotation(-10,0,1,0);
[imageContainer addSubview:imageView];
//[imageContainer addSubview:imageSideView];
[self.view addSubview:imageContainer];
[self.view bringSubviewToFront:imageView];
});
}];
}
如您所见,尽管图像反转(或镜像),但我仍达到了预期的效果。我不打算使用任何第三方框架/库来实现此目的,因为我知道可以通过修改现有代码来实现。
虽然我可以将CATransform3DMakeRotation(-10,0,1,0)中的y值从1更改为0,以获取正确的图像方向,但也可以将https://imgur.com/yKL4NQA的视角更改为
我需要一些东西来获得正确的图像而不改变视角。任何帮助是极大的赞赏。
答案 0 :(得分:1)
最大的问题是CATransform3DMakeRotation
的第一个参数必须是弧度,而不是度。
imageView.layer.transform = CATransform3DMakeRotation(-10 * M_PI / 180.0, 0, 1, 0);
然后,您需要更改shadowPath的x
:
[shadowPath moveToPoint:CGPointMake(0, 0)];
[shadowPath addLineToPoint:CGPointMake(-10, 10)];
[shadowPath addLineToPoint:CGPointMake(-10, height-10)];
[shadowPath addLineToPoint:CGPointMake(0, height)];
这给出了预期的结果。