EXC_BAD_ACCESS on setMask

Question

I'm trying to apply a mask to both a base layer and a background layer, but the solutions below blows up when setting the mask on either layer. Could anyone please let me know what I'm doing wrong?

self.backLayer = [[CALayer alloc] init];
[self.backLayer setBounds:[self bounds]];
[self.backLayer setPosition:CGPointMake([self bounds].size.width/2, [self bounds].size.height/2)];
self.backLayer.opacity = 0.3f;
[[self layer] insertSublayer:self.backLayer atIndex:0];

[[self layer] setMasksToBounds:YES];
[[self layer] setBorderWidth:0.0f];

UIBezierPath* path = [UIBezierPath bezierPathWithOvalInRect:[self bounds]];
self.backLayer2 = [CAShapeLayer layer];
self.backLayer2.path = path.CGPath;
self.layer.mask = self.backLayer2;
self.backLayer.mask = self.backLayer2;
CGPathRelease(path.CGPath);

once check this http://stackoverflow.com/questions/327082/exc-bad-access-signal-received — Smile, Nov 12 '14 at 11:52

score 0 · Answer 1 · edited Nov 12 '14 at 13:02

0

Seems your code posted is perfect. There is no problem with the code. The EXC_BAD_ACCESS will occur if you perform any action on deallocated object. Please make sure the self object/view is not deallocated by ARC. Check the place where you declared the view is still alive in stack/memory. Dont forget to check the property declaration parameters (Strong/weak/noatomic) for backLayer property.

edited Nov 12 '14 at 13:02

Arpit Kulsreshtha

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answered Nov 12 '14 at 12:45

Prasad Babu

1

score 0 · Accepted Answer · answered Nov 19 '14 at 03:12

0

It turns out that you are not supposed to release the CGPath of a UIBezierPath. So, the line

CGPathRelease(path.CGPath);

releases memory the object tries to also release later, causing a memory violation.

answered Nov 19 '14 at 03:12

Joao

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EXC_BAD_ACCESS on setMask

2 Answers2