问题描述
我使用CoreAnimation为UIImageView设置动画（曲线Bezier动画）。这是我的代码：
I use CoreAnimation to animate UIImageView (curve Bezier animation). Here`s my code:
CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
pathAnimation.calculationMode = kCAAnimationCubic;
pathAnimation.fillMode = kCAFillModeForwards;
pathAnimation.removedOnCompletion = NO;
CGPoint endPoint = originalPosition;
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:star.layer.position];
[path addQuadCurveToPoint:endPoint controlPoint:CGPointMake(star.layer.position.x, endPoint.y)];
pathAnimation.path = path.CGPath;
[star.layer addAnimation:pathAnimation forKey:@"moveToScorebarAnimation"];
结果，我得到 EXC_BAD_ACCESS（代码= 2，地址= 0x0） with stacktrace：
As a result, I get EXC_BAD_ACCESS (code=2, address=0x0) with stacktrace:
CoreGraphics`CG::Path::apply(void*, void (*)(void*, CGPathElementType, CGPoint const*)) const:
0x613c06: pushl %ebp
0x613c07: movl %esp, %ebp
0x613c09: subl $24, %esp
0x613c0c: movl 8(%ebp), %eax
0x613c0f: movl (%eax), %ecx
0x613c11: movl (%ecx), %eax
0x613c13: movl 16(%ebp), %edx
0x613c16: movl %edx, 8(%esp)
0x613c1a: movl 12(%ebp), %edx
0x613c1d: movl %edx, 4(%esp)
0x613c21: movl %ecx, (%esp)
0x613c24: calll *64(%eax)
0x613c27: addl $24, %esp
0x613c2a: popl %ebp
0x613c2b: ret
我尝试使用其他手册进行操作，但是应用崩溃的方式相同。无法理解我的错。谢谢您的帮助。
I tried to use different manuals to do it, but app crashes the same way. Can't understand where`s my fault. Any help will be appreciated, thanks.
P。 S。这是一个类似的，但不幸的是，仅通过删除动画即可解决该问题。
P. S. Here's a similar bug, but unfortunately it is solved just by removing animation.
P。 P. S.弧已启用。另外，如果我注释 pathAnimation.path = path.CGPath; 行，则不会出现崩溃以及动画（不出意外的是：））。
P. P. S. Arc is enabled. Also, if I comment pathAnimation.path = path.CGPath; line, crash does not appear, as well as animation (what is not surprised :) ).
推荐答案
用CABasicAnimation替换CAKeyframeAnimation：
Replace CAKeyframeAnimation with CABasicAnimation:
CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
pathAnimation.fromValue = [NSValue valueWithCGPoint:star.layer.position];
pathAnimation.toValue = [NSValue valueWithCGPoint:endPoint];
pathAnimation.fillMode = kCAFillModeForwards;
pathAnimation.removedOnCompletion = NO;
好像是苹果的虫子
这篇关于使用CoreAnimation时为EXC_BAD_ACCESS的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！