`Attempt to mutate immutable object with deleteCharactersInRange:CoreFoundation ___exceptionPrepr...
近期项目中频繁报出AttempttomutateimmutableobjectwithdeleteCharactersInRange:CoreFoundation___exceptionPreprocess的错误,整个项目的崩溃率一度上升到了0.5%....9月正值用户暴增的时期,这个崩溃率简直吓shi我们...具体涉及到的崩溃有几个:所有的包含UITextField的AlertView弹框(无论