iOS photo thumbnail thumbnail blur problem

Use Alasset to get thumbnails of pictures, generally have fuzzy problems

[_imageview setimage:[uiimage ImageWithCGImage:asset.thumbnail];

For this kind of problem, the more simple way to modify is to use

[_imageview setimage:[uiimage ImageWithCGImage:asset.aspectRatioThumbnail];

Aspectratiothumbnail gets the thumbnail image of the original photo, not the square map. If you use it directly, you'll have problems.

You can see that the pictures are stretched and the proportions are uncoordinated. Can make it self-adapting

_imageview=[[uiimageview Alloc] Initwithframe:cgrectmake (00= Uiviewcontentmodescaleaspectfill;

This is

found that the picture scale is not maladjusted, but the pattern is chaotic. The immediate thought is to cut the picture, so that the size of the appropriate. But there's a simpler way to use masks

_imageview=[[uiimageview Alloc] Initwithframe:cgrectmake (00== YES;

This can be achieved similar to the cutting function, the perfect solution.

iOS photo thumbnail thumbnail blur problem