输入＆＃39; AnyObject＆＃39;不符合协议＆＃39; BooleanType＆＃39;

Question

这是我在目标c中的代码

 id locationValue = [launchOptions objectForKey:UIApplicationLaunchOptionsLocationKey];
if (locationValue)
{
    UIApplication *app  = [UIApplication sharedApplication];
    UIBackgroundTaskIdentifier bgTask = UIBackgroundTaskInvalid;
    bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
        [app endBackgroundTask:bgTask];
    }];
    [self startLocationUpdates];
}

我将locationValue定义为AnyObjectType，并在标题点击

时提到错误

if(locationValue)

我正在将此转换为快速..所以请帮助..

Answer 1

if语句中任何条件的值必须具有符合BooleanType协议的类型，这意味着条件必须是布尔表达式。

public class ViewModelsManpowerEdit { public PmcManpowerRequestViewModel ModelManpowerRequestEdit { get; set; } public List<ManpowerRequestEdit_Result> ModelManpowerRequestEditResults { get; set; } }不是布尔表达式，您需要locationValue。