为什么应用会自动刷新背景？

Question

if ([[UIApplication sharedApplication] backgroundRefreshStatus] == UIBackgroundRefreshStatusAvailable) {

    NSLog(@"Background updates are available for the app.");
}else if([[UIApplication sharedApplication] backgroundRefreshStatus] ==     UIBackgroundRefreshStatusDenied)
{
    NSLog(@"The user explicitly disabled background behavior for this app or for the whole system.");
}else if([[UIApplication sharedApplication] backgroundRefreshStatus] == UIBackgroundRefreshStatusRestricted)
{
    NSLog(@"Background updates are unavailable and the user cannot enable them again. For example, this status can occur when parental controls are in effect for the current user.");
}

并使用此代码检查应用程序状态：该应用程序始终进入UIBackgroundRefreshStatusAvailable，并且未在功能（和info.plist）中为“背景模式”设置任何设置。

谁能回答这个，谢谢。

Answer 1

backgroundRefreshStatus属性仅镜像当前用户的设备设置，并且与您设置的info.plist模式无关