ios - "Convenience initializer missing a 'self' call to another initializer" -


i'm trying convert code ios 8 project, , need explanation on how fix warning: "convenience initializer missing 'self' call initializer"

on code: 

-(instancetype) initwithcoder:(nscoder *)adecoder // warning: convenience initializer missing 'self ' call initializer {     if (self = [super initwithcoder:adecoder]) // warning: convenience initializer should not invoke initializer on 'super'     {     // init stuff here     }     return self; }

the new clang shipping xcode 6 enables compiler-enforced designated initializers through ns_designated_initializer macro. when marks 1 of init-family methods in class's declaration, other initializers considered "secondary" (to use apple's terminology) initializers. is, should call through 1 designated or secondary initializer until reach designated initializer.

uiview marks nothing designated initializer, somewhere you've declared init method of class designated initializer. because of that, nscoder's initializer becomes marked secondary , generates warning. i've filed radar (rdar://17559176) it, until can turned off on per-file basis specifying -wno-objc-designated-initializers, or providing appropriate diagnostic push-pop -wobjc-designated-initializers.


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