protected override async Task InitializationAsync()
{
for (int i = 1; i < 5; i++)
{
BitmapImage image = new BitmapImage();
using (var imageStream = await ResourceUtility.GetApplicationResourceStreamAsync($"Assets/new_user_guide_{i}.jpg"))
{
image.SetSource(imageStream);
}
GuideImages.Add(image);
}
}
/// <summary>
/// 获取Splash图片
/// </summary>
/// <returns></returns>
private async Task <IRandomAccessStream> GetSplashImageAsync()
{
try
{
var lastCacheSplashFileName = Global.AppConfig.LastCacheSplashFileName; //缓存的Splash文件名称
bool isSplashExpired = false; //Splash是否已过期
if (Global.AppConfig.CacheSplashExpire.HasValue)
{
if (Global.AppConfig.CacheSplashExpire < DateTime.Now)
{
isSplashExpired = true;
Global.AppConfig.CacheSplashExpire = null; //清空过期时间
Global.SaveAppConfig();
}
}
IRandomAccessStream splashStream = null;
if (isSplashExpired || string.IsNullOrWhiteSpace(lastCacheSplashFileName) || !(await LocalCacheUtility.ExistsCacheFile(lastCacheSplashFileName))) //没有缓存Splash,或者缓存已过期,或者缓存图片获取失败
{
await LocalCacheUtility.DeleteCacheFile(lastCacheSplashFileName);
splashStream = await ResourceUtility.GetApplicationResourceStreamAsync("Assets/new_splash_content.png");
}
else
{
splashStream = await LocalCacheUtility.GetCacheAsync(lastCacheSplashFileName);
}
return(splashStream);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
return(null);
}
}