ios - 在初始化期间存储到 NSString 的值永远不会被读取

Question

在我的 iOS 应用程序中，我有以下代码:

case SASpeechSubCase03:
{
     SAActivity currentActivity = self.mediator.selectedActivity;

     NSString *sActivity = NSLocalizedString(@"activity", @"activity");
     NSString *sActivity2 = NSLocalizedString(@"another activity", @"another activity");
     if(currentActivity == SAActivityWalk)
     {
        sActivity = NSLocalizedString(@"walk", @"walk");
        sActivity2 = NSLocalizedString(@"walking", @"walking");
     }
     else
     {
        sActivity = NSLocalizedString(@"run", @"run");
        sActivity2 = NSLocalizedString(@"jogging", @"jogging");
     }

     return [NSString stringWithFormat:speech.text, sActivity, sActivity2];

     break;
}

当我在上面运行机器人时，它给了我以下警告:

Bot Issue: analyzerWarning. Dead store. Issue: Value stored to 'sActivity' during its initialization is never read. File: SAAnnouncementService.m. Integration Number: 42. Description: Value stored to 'sActivity' during its initialization is never read.

Bot Issue: analyzerWarning. Dead store. Issue: Value stored to 'sActivity2' during its initialization is never read. File: SAAnnouncementService.m. Integration Number: 42. Description: Value stored to 'sActivity2' during its initialization is never read.

谁能告诉我这里可能有什么问题？

非常感谢任何形式的帮助!

Answer 1

问题是您初始化变量然后直接启动 if-else block ，而没有使用(即读取)初始值。

当执行到 if-else block 时，它肯定会被分配一个新值，不管它之前是什么值。