问题描述
我必须将外部UIScreen的模式设置为以1024x768的分辨率运行。
首先我搜索屏幕是否支持此分辨率:
I have to set the external UIScreen's mode to run with the resolution 1024x768.First I search if the screen supports this resolution:
if ([[UIScreen screens] count] > 1){
CGSize size1024;
size1024.height = 0;
size1024.width = 0;
UIScreenMode *screenMode1024 = nil;
UIScreen *secondScreen = [[UIScreen screens] objectAtIndex:1];
for(int i = 0; i < [[secondScreen availableModes] count]; i++)
{
UIScreenMode *current = [[[[UIScreen screens] objectAtIndex:1] availableModes] objectAtIndex: i];
if (current.size.width == 1024.0 && current.size.height == 768.0)
{
size1024 = current.size;
screenMode1024 = current;
break;
}
}
}
之后我设置外部屏幕的模式使用此分辨率,但不知何故它不起作用,屏幕使用其他,默认分辨率。
After that I set the external screen's mode to use this resolution, but somehow it does not work and the screen is using other, the default resolution.
secondScreen.currentMode = screenMode1024;
UIWindow *secondWindow = [[UIWindow alloc] initWithFrame: CGRectMake(0,0, size1024.width, size1024.height)];
secondWindow.screen = secondScreen;
...
secondWindow.hidden = NO;
任何帮助?也许我错过了一些设置?我也试过这个:
Any help ? Maybe I missed some settings ? I also tried with this :
[[[UIScreen screens] objectAtIndex:1] setCurrentMode:screenMode1024];
推荐答案
我找到了解决方案。
问题是当外部屏幕连接到iOS设备时必须更改屏幕模式。
I found the solution.The problem was that the screen's mode has to be changed when the external screen is connected to the iOS device.
[[NSNotificationCenter defaultCenter] addObserver: self selector:@selector(screenDidConnectNotification:) name: UIScreenDidConnectNotification object: nil];
屏幕模式应该在screenDidConnectNotification函数中更改。
The screen mode should be changed inn the screenDidConnectNotification function.
这篇关于设置UIScreen的模式/分辨率的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!