Question

我正在带上EXC_BAD_ACCESS差错。

GADRequest *request = [[GADRequest alloc] init];

I don t have source code of GADRequest as its from Google AdMob SDK. The stack trace is below. Its happening only on device and not on simulator.

#0  0x34a80462 in objc_msgSend ()
#1  0x0017d9dc in +[GADRequest alloc] (self=<value temporarily unavailable, due to optimizations>, _cmd=<value temporarily unavailable, due to optimizations>) at /Users/mikeying/work/ios_sdk_git/googlemac/iPhone/GoogleAds/NextGen/Request/GADRequest.m:48
#2  0x0006e728 in -[AdWhirlAdapterGoogleAdMobAds getAd] (self=0x5511c0, _cmd=0x225209) at /Users/xxx/yyy/libs/AdWhirl/adapters/AdWhirlAdapterGoogleAdMobAds.m:68
#3  0x0007b4f6 in -[AdWhirlView makeAdRequest:] (self=0x5538f0, _cmd=0x22691c, isFirstRequest=1  01 ) at /Users/xxx/yyy/libs/AdWhirl/internal/AdWhirlView.m:370
#4  0x0007ac5c in -[AdWhirlView buildPrioritizedAdNetCfgsAndMakeRequest] (self=0x5538f0, _cmd=0x226965) at /Users/xxx/yyy/libs/AdWhirl/internal/AdWhirlView.m:235
#5  0x35818bbe in -[NSObject(NSObject) performSelector:withObject:] ()

Answer 1

该方案收到EXC_BAD_ACCESS信号,即电文被发送至已转让的物体。由于环境变异的NSZombieEnabled set to YES,物体从未被分配,而是被保存为zombie物体。当电文被发送至Zombie物体时,执行停在通常会引起EXC_BAD_ACCESS信号的线上。

在Xcode 4.2中,你可以通过编辑办法确定环境变量,在左小组中选择“Run XYZ.app”阶段,然后选择右边的“Arguments”。

重要的是,一旦你去做,或你的申请将使用大量记忆并最终坠毁。

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