获取错误的访问错误

Question

I am using CAShapeLayer and UIBezierPath in my application. I have a reload button. When I am reloading my view several times, it is giving me an EXC_BAD_ACCESS error. Here is my code :

self.layer.sublayers = nil;
NSInteger numOfDays = [self differenceBetweenTwoDatesFromDate:startDate toDate:endDate];
CGFloat widthOfComponent = numOfDays * dayWidth;
if (self.frame.size.width > widthOfComponent) {
    DLog(@"%@",NSStringFromCGRect(self.frame))
    widthOfComponent = self.frame.size.width - 2 * DIFFERENCE_FROM_ORIGIN;
    dayWidth = widthOfComponent/numOfDays;
}
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, widthOfComponent, self.frame.size.height);

[self reloadData];

[super layoutSubviews];

I am getting this error when I am passing the new frame to self.frame .

Answer 1

It's caused by self.layer.sublayers = nil . Indiscriminately removing all sublayers causes nasty crashes in iOS 7, which can occur much later in the program's execution. I have tested this thoroughly using both rootLayer.sublayers = nil and [rootLayer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)] . There must be a system-created layer that's getting messed up.

You have to keep your own array of layers and remove them yourself:

[myArrayOfLayersIAdded makeObjectsPerformSelector:@selector(removeFromSuperlayer)];