为什么self.view.frame.size.width在模拟器上没有变化？ [英] Why doesn't self.view.frame.size.width change on the simulator?

问题描述

我将此语句添加到ViewDidLoad：

I added this statement to ViewDidLoad:

NSLog(@"Screen resolution: (%f, %f)", self.view.frame.size.width, self.view.frame.size.height);

这是我在模拟器的Device属性为iPhone时得到的结果：

Here's the result I get when the "Device" property of the simulator is "iPhone":

屏幕分辨率：（320.000000,548.000000）

Screen resolution: (320.000000, 548.000000)

当我将其设置为iPhone（Retina 4英寸）时也是如此：

Same thing when I set it to "iPhone (Retina 4-inch)":

屏幕分辨率：（320.000000,548.000000）

Screen resolution: (320.000000, 548.000000)

但为什么呢？屏幕分辨率是不是应该不同？

But why? Isn't the screen resolution supposed to be different?

推荐答案

这是因为分辨率以点而非像素打印

This is because the resolution is printed in points and not in pixels

对于视网膜显示 1点= 2像素

对于常规显示 1点= 1像素

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