ios - CALayer: Custom animatable properties that update built in animatable properties -


i'm creating custom animatable property on cagradientlayer derived class has change other built in animatable properties on cagradientlayer base class , wondering best approach is. i'm updating dependant properties in display method:

@implementation customgradientlayer  @dynamic mycustomproperty;  + (bool) needsdisplayforkey: (nsstring*)akey {     bool needsdisplay = [akey isequaltostring: @"mycustomproperty"];     if (!needsdisplay)     {         needsdisplay = [super needsdisplayforkey: akey];     }     return needsdisplay; }  - (void) display {     cgfloat mycustomproperty = [self.presentationlayer mycustomproperty];       [catransaction begin];     [catransaction setdisableactions: yes];      // update dependant properties on self      [catransaction commit];      [super display]; }

is possible safely update dependant properties in custom property setter instead without affecting underlying calayer magic?

i found solution interested can use following method without interfering calayar stuff:

- (void) didchangevalueforkey: (nsstring*)akey (void) didchangevalueforkey: (nsstring*)akey {     // update dependent properties }

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