转自 ：stackoverflow
App crashing with +[NSDecimalNumber gad_negativeOne]: issue?
My app was working before well, then i added admob
framework and now its crashing .
Please check the crash logs,
self.adBanner = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait
origin:origin]解决方案：
You need to add "-ObjC" to Other Linker Flags of Build Settings tab. Good luck!
