如何检测Retina HD显示？ [英] How to detect Retina HD display?

问题描述

UIScreen 在iOS 8中有一个新的 nativeScale 属性，但文档不会说一个字。

UIScreen has a new, nativeScale property in iOS 8 but the documentation does not say a word about it.

@property(nonatomic, readonly) CGFloat nativeScale

还有一个缩放属性，但文档说它是2的retina显示。

There is also a scale property but the docs say it is 2 for retina displays.

@property(nonatomic, readonly) CGFloat scale

$ b b

我想知道是否有办法区分显示。我需要知道设备是否具有Retina HD显示器的原因是因为我想根据显示来请求不同尺寸的图像。

I am wondering if there is a way to distinguish the displays. The reason why I need to know whether the device has Retina HD display is because I want to request images with different sizes based on the displays.

感谢任何帮助！ / p>

Thanks for any help!

推荐答案

以下可以非常好地检测iPhone6Plus上的显示类型。

Below works very well to detect type of display on iPhone6Plus.

if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] && [[UIScreen mainScreen] scale] == 3.0)
    NSLog(@"Retina HD"); 
else
    NSLog(@"Non Retina HD");

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