為什么應用會自動刷新背景？

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.");
}

並使用此代碼檢查應用程序狀態：該應用程序始終進入UIBackgroundRefreshStatusAvailable，並且未在功能（和info.plist）中為“背景模式”設置任何設置。

誰能回答這個，謝謝。

Answer 1

backgroundRefreshStatus屬性僅鏡像當前用戶的設備設置，並且與您設置的info.plist模式無關