keep a weak reference to controls.
keep a weak reference to controls.

seivan/SHActionSheetBlocks,seivan/SHActionSheetBlocks,seivan/SHActionSheetBlocks,seivan/SHAlertViewBlocks,seivan/SHControlBlocks,seivan/SHBarButtonItemBlocks,seivan/SHAlertViewBlocks,seivan/SHControlBlocks,seivan/SHAlertViewBlocks,seivan/SHBarButtonItemBlocks,seivan/SHBarButtonItemBlocks,seivan/SHControlBlocks