ios - is this a retain cycle in Objective C? -

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i've declared property on uicollectionviewcell this:

@property (nonatomic, copy) void(^onselection)(bool selected);

i override -setselected: this:

- (void)setselected:(bool)selected {     [super setselected:selected];      if (self.onselection != null) {         self.onselection(selected);     } }

then in -cellforitematindexpath: configure this

cell.onselection = ^(bool selected) {     //the compiler telling me might retain cycle dont think so...     cell.tintcolor = [uicolor redcolor]; };

is retain cycle?

thanks!

yes is. instead should use weak+strong combo.

__weak typeof(cell) weakcell = cell; cell.onselection = ^(bool selected) {     __strong typeof(weakcell) strongcell = weakcell;     //the compiler telling me might retain cycle dont think so...     strongcell.tintcolor = [uicolor redcolor]; };

in particular case don't need block because can update cell in subclass inside of setselected: or handle tableview:didselectrowatindexpath: in table view controller.


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