Ios UIImageView透视倾斜
我想要什么: 我所取得的成就: 以下是我正在使用的函数:Ios UIImageView透视倾斜,ios,objective-c,uiimageview,Ios,Objective C,Uiimageview,我想要什么: 我所取得的成就: 以下是我正在使用的函数: - (void) showViewWithImageFromAsset: (PHAsset *) asset { UIView *imageContainer = [[UIView alloc] initWithFrame:CGRectMake(25, 320, 400, 400)]; [imageContainer setBackgroundColor:[UIColor whiteColor]]; UII
- (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];
});
}];
}
正如你所看到的,我已经达到了预期的效果,尽管我使用了一个反转(或镜像)的图像。我不打算使用任何第三方框架/库来实现这一点,因为我知道修改现有代码是可能的
虽然我可以将CATTransferM3dMakeRotation(-10,0,1,0)中的y值从1更改为0以获得正确的图像方向,但这也会将透视图更改为此
我需要一些东西在不改变视角的情况下获得正确的图像。非常感谢您的帮助 最大的问题是,
CATTransferorM3dMakeRotation
的第一个参数需要是弧度,而不是度
imageView.layer.transform = CATransform3DMakeRotation(-10 * M_PI / 180.0, 0, 1, 0);
然后您需要更改阴影路径的x
:
[shadowPath moveToPoint:CGPointMake(0, 0)];
[shadowPath addLineToPoint:CGPointMake(-10, 10)];
[shadowPath addLineToPoint:CGPointMake(-10, height-10)];
[shadowPath addLineToPoint:CGPointMake(0, height)];
这将给出所需的结果。最大的问题是
CATTransferM3dMakeRotation
的第一个参数需要是弧度,而不是度
imageView.layer.transform = CATransform3DMakeRotation(-10 * M_PI / 180.0, 0, 1, 0);
然后您需要更改阴影路径的x
:
[shadowPath moveToPoint:CGPointMake(0, 0)];
[shadowPath addLineToPoint:CGPointMake(-10, 10)];
[shadowPath addLineToPoint:CGPointMake(-10, height-10)];
[shadowPath addLineToPoint:CGPointMake(0, height)];
这会得到理想的结果。谢谢你,效果不错。弧度部分是我缺少的一点。再次感谢。谢谢你,这很有效。弧度部分是我缺少的一点。再次感谢。