問題模糊UIImage

Question

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

我發現這個代碼的地方除了問題是，當我用它它說沒有找到方法。另外，當我輸入圖層。並按下轉義查看自動完成的所有屬性我看不到所以是你能幫我找出問題，也許我沒有進口的東西？請提前幫助並提前致謝

Answer 1

您必須從現有框架導入Quartz核心框架並將其添加到您的項目中，然後導入到.h類中。

Answer 2

你好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];