UIImageView *assetImageView = [[UIImageView alloc] initWithFrame:viewFrames];
[assetImageView setContentMode:UIViewContentModeScaleToFill];
[assetImageView setImage:[UIImage imageWithCGImage:[self.asset thumbnail]]];
[self addSubview:assetImageView];
由于质量下降,这段代码生成了一个模糊的图像,我发现我需要使用它
CGContextSetInterpolationQuality(context, kCGInterpolationHigh);
但是我如何在我的情况下应用此代码?