获取iPhone的物理屏幕尺寸（英寸） [英] Getting the physical screen size in inches for iPhone

问题描述

如何以英寸为单位以编程方式获取屏幕尺寸（例如iPhone 4,3.5英寸）。

How can I get the screen size programmatically in inches(for example iPhone 4, 3.5 inches).

通过检测iPhone /我找到了一种方法iPad模型，但硬编码不是我想要的，所以我不是那样的。

I found a way to do it by detecting the iPhone/iPad model but hard coding is not what I want so I am not looking something like that.

推荐答案

这将找到对角屏幕设备大小：

This will find the diagonal screen size of a device:

float scale = [[UIScreen mainScreen] scale];

float ppi = scale * ((UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) ? 132 : 163);

float width = ([[UIScreen mainScreen] bounds].size.width * scale);
float height = ([[UIScreen mainScreen] bounds].size.height * scale);

float horizontal = width / ppi, vertical = height / ppi;

float diagonal = sqrt(pow(horizontal, 2) + pow(vertical, 2));

对角线将包含对角线尺寸，屏幕的英寸。

diagonal will contain the diagonal size, in inches, of the screen.

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