问题模糊UIImage

Question

 UIView *myView = self;
    CALayer *layer = [myView layer];
    [layer setRasterizationScale:0.25];
    [layer setShouldRasterize:YES];

我发现这个代码在某处，除了问题是当我使用它时它说没有找到方法。另外，当我输入图层。并按下转义以查看自动完成的所有属性我看到没有，所以你可以帮我找出问题，也许我没有输入什么？请提前帮助和感谢

Answer 1

您必须从现有框架导入Quartz-core框架并将其添加到您的项目中，然后导入.h类。

Answer 2

Hello Aspyn，

       You will try this code this will help you

      First of all add QuartzCore.framework from existing framework and .m file you import this framework as follow
      #import <QuartzCore/QuartzCore.h>
      UIView *myView = self;
      CALayer *layer = [myView layer];
      [layer setRasterizationScale:0.25];
      [layer setShouldRasterize:YES];
      [layer setContentsScale:UIViewContentModeScaleAspectFit];