uiscreen

Why do I see in some sample code from Apple (such as PhotoScroller) that I should do the following in loadView : CGRect frame = [[UIScreen mainScreen] bounds]; instead of CGRect frame = [[UIScreen mainScreen] applicationFrame]; Does it make a difference to get the main screen's frame? ApplicationFrame is the screen size minus the size of the status bar (if visible), bounds is the screen size regardless of status bar. So applicationFrame would return CGRectMake(0,0,320,460) assuming your app has the status bar set to be visible, while bounds would return CGRectMake(0,0,320,480) under the same

In Objective-C we can get device width and height by using following code : CGRect sizeRect = [UIScreen mainScreen].applicationFrame float width = sizeRect.size.width float height = sizeRect.size.height How can do this in with Swift ? iPatel I haven't tried but it should be.. var bounds = UIScreen.main.bounds var width = bounds.size.width var height = bounds.size.height @Houssni 's answer is correct, but since we're talking Swift and this use case will come up often, one could consider extending CGRect similar to this: extension CGRect { var wh: (w: CGFloat, h: CGFloat) { return (size.width,

How would I program the ability to change brightness in-app? I know that its possible as I have seen at least three apps that can do it. This would be very useful for my app. I know that it's only possible in iOS 5 with the UIScreen Class, but I have no idea how to program it. Please help me! The UIScreen class has a new property called brightness . In addition, there's another property called wantsSoftwareDimming that (when set to YES ) allows you to go below the lowest brightness supported by the hardware, because a special "dimming view" is overlaid over the screen to darken things even

I am using this code to capture a screenshot and to save it to the photo album. -(void)TakeScreenshotAndSaveToPhotoAlbum { UIWindow *window = [UIApplication sharedApplication].keyWindow; if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) UIGraphicsBeginImageContextWithOptions(window.bounds.size, NO, [UIScreen mainScreen].scale); else UIGraphicsBeginImageContext(window.bounds.size); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(image, nil,

In sample logs posted in this question , the results are identical. Does anyone know if there is meant to be a logical difference between the two? Even Apple's description is confusing. Here is the description of scale : The natural scale factor associated with the screen ... This value reflects the scale factor needed to convert from the default logical coordinate space into the device coordinate space of this screen... Here is their description of nativeScale : The native scale factor for the physical screen What is the difference between natural and native ? The nativeBounds and nativeScale