IOS assertion Failure in [MyClass Layoutsublayersoflayer:]

The Layoutsubviews method of a custom view

-(void) layoutsubviews

{

[Super Layoutsubviews];

　　After executing [super Layoutsubviews], write the constraint code, under IOS7 will crash, reported assertion failure in [MyClass Layoutsublayersoflayer:],ios8 is normal.

}

Modify the method, put [super layoutsubviews]; put it in the back, like this

-(void) layoutsubviews

{

　　Code for custom constraints

[Super Layoutsubviews];

}

Sometimes, in a custom view, to write a constraint code to Subview, you need to get self.width or self.height, so you can only write constraints in Layoutsubviews

IOS assertion Failure in [MyClass Layoutsublayersoflayer:]