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从服务器下载高分辨率图像以显示视网膜显示的战略
原标题:Strategy for downloading high resolution images from server for retina display

因此在iOS I 上的视网膜显示通常有图像, 其大小为@ 2x/ per apple 指南的两倍 。 如何进行视网膜显示。 但这个命名公约只对程序捆绑中的图像起作用, 而这些图像是我无法写入的 。

您从服务器上提取高分辨率图像的战略是什么?

我是否应该总是拉下高分辨率图像(正常的60x60图像为120x120),

最佳回答

设置视网膜图像

UIImage *image;  // from download
image=[UIImage imageWithCGImage:[image CGImage] scale:2.0 orientation:UIImageOrientationUp];

如果您有一个视网膜显示, 请先检查

if([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
    BOOL retina = [[UIScreen mainScreen] scale] == 2.0 ? YES : NO;

如果"retine =YYYY", 获取您想要的视网膜图像

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