转换为 NSStringFromCGAffineTransform
我试图保存转换后的（旋转、缩放和移动）UIImageView 并将转换加载回屏幕，但它根本不起作用。每次我尝试时，UIImageView 都会位于应有的不同位置。
这里有一些代码：
保存到UserDefaults：
NSUserDefaults * UserDefs = [NSUserDefaults standardUserDefaults];
UIImageView * petit = (UIImageView*)[ConView viewWithTag:1];
[UserDefs setBool:YES forKey:@"gespeichert"];
[UserDefs setObject:NSStringFromCGRect([petit frame]) forKey:@"frame"];
[UserDefs setObject:NSStringFromCGAffineTransform(petit.transform) forKey:@"position1"];
[UserDefs synchronize];
从UserDefaults加载：
CGAffineTransform transformation = CGAffineTransformFromString([UserDefs objectForKey:@"position1"]);
su.transform = transformation; // "su" is an UIImageView - allocated with Frame from:
CGRect RectFrame = CGRectFromString([UserDefs objectForKey:@"frame"]);
我做错了什么？ 也许有人可以帮助我。
＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃
编辑： 我现在更改了代码： 用于加载
CGRect frameGroesse;
frameGroesse = CGRectFromString([UserDefs objectForKey:@"frame"]);
UIImageView * su = [[UIImageView alloc] initWithFrame:frameGroesse];
su.image = [UIImage imageNamed:@"Xcode.jpg"];
su.contentMode = UIViewContentModeScaleAspectFit;
su.multipleTouchEnabled = YES;
su.tag = 1;
[su setUserInteractionEnabled:YES];
[self addGestureRecognizersToPiece:su];
CGAffineTransform transformation = CGAffineTransformFromString([UserDefs objectForKey:@"position1"]);
su.transform = transformation;
su.center = CGPointFromString([UserDefs objectForKey:@"center"]);
[ConView addSubview:su];
[ConView bringSubviewToFront:su];
[ConView bringSubviewToFront:[ConView viewWithTag:1]];
[su release];
用于保存：
NSUserDefaults * UserDefs = [NSUserDefaults standardUserDefaults];
UIImageView * petit = (UIImageView*)[ConView viewWithTag:1];
[UserDefs setBool:YES forKey:@"gespeichert"];
[UserDefs setObject:NSStringFromCGRect([petit bounds]) forKey:@"frame"];
[UserDefs setObject:NSStringFromCGPoint(petit.center) forKey:@"center"];
[UserDefs setObject:NSStringFromCGAffineTransform(petit.transform) forKey:@"position1"];
[UserDefs synchronize];
但是加载图像后，我仍然有一个小动作。仍然需要一些帮助。
I am trying to save a transformed (rotated, scaled and moved) UIImageView and load the transformations back to the screen but it doesn't work at all. Every time i try, the UIImageView is on a different place as it should be.
Here some code:
Saving into UserDefaults:
NSUserDefaults * UserDefs = [NSUserDefaults standardUserDefaults];
UIImageView * petit = (UIImageView*)[ConView viewWithTag:1];
[UserDefs setBool:YES forKey:@"gespeichert"];
[UserDefs setObject:NSStringFromCGRect([petit frame]) forKey:@"frame"];
[UserDefs setObject:NSStringFromCGAffineTransform(petit.transform) forKey:@"position1"];
[UserDefs synchronize];
Loading from UserDefaults:
CGAffineTransform transformation = CGAffineTransformFromString([UserDefs objectForKey:@"position1"]);
su.transform = transformation; // "su" is an UIImageView - allocated with Frame from:
CGRect RectFrame = CGRectFromString([UserDefs objectForKey:@"frame"]);
What did i wrong ?
Maybe some one can help me.
# # # # # # # # # # # # # # #
Edit:
I changed the code now:
For loading
CGRect frameGroesse;
frameGroesse = CGRectFromString([UserDefs objectForKey:@"frame"]);
UIImageView * su = [[UIImageView alloc] initWithFrame:frameGroesse];
su.image = [UIImage imageNamed:@"Xcode.jpg"];
su.contentMode = UIViewContentModeScaleAspectFit;
su.multipleTouchEnabled = YES;
su.tag = 1;
[su setUserInteractionEnabled:YES];
[self addGestureRecognizersToPiece:su];
CGAffineTransform transformation = CGAffineTransformFromString([UserDefs objectForKey:@"position1"]);
su.transform = transformation;
su.center = CGPointFromString([UserDefs objectForKey:@"center"]);
[ConView addSubview:su];
[ConView bringSubviewToFront:su];
[ConView bringSubviewToFront:[ConView viewWithTag:1]];
[su release];
For saving:
NSUserDefaults * UserDefs = [NSUserDefaults standardUserDefaults];
UIImageView * petit = (UIImageView*)[ConView viewWithTag:1];
[UserDefs setBool:YES forKey:@"gespeichert"];
[UserDefs setObject:NSStringFromCGRect([petit bounds]) forKey:@"frame"];
[UserDefs setObject:NSStringFromCGPoint(petit.center) forKey:@"center"];
[UserDefs setObject:NSStringFromCGAffineTransform(petit.transform) forKey:@"position1"];
[UserDefs synchronize];
But after loading the image, i still get a small movement. Still need some assistance please.
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评论（2）
CGAffineTransform 可能会使您应用变换的视图的框架属性无效，因此也许您没有存储有用的框架...
The CGAffineTransform may invalid the frame property of the view you apply the transform, so maybe you are not storing a usefull frame...
您不应将
transform、bounds和center与frame混合使用。例如，为视图设置transform将影响其框架。至于你的UIImageView：它在超级视图中的位置应该由它的center定义。它的旋转/缩放应该由transform定义（为了简单起见，不要将翻译放在变换中）。大小应由bounds.size 定义。因此，您必须存储三件物品。You should not mix
transform,bounds, andcenterwithframe. For example, settingtransformto a view will affect its frame. As for yourUIImageView: its position in superview should be defined by itscenter. Its rotation/scale should be defined bytransform(don't put translations in transform for simplicity). The size should be defined bybounds.size. So, you have to store three items.