iOS screen, status bar (statusbar), program window size gain and screen rotation size change

App size, remove status bar

CGRect r = [UIScreen mainscreen].applicationframe;

This size does not swap wide with the screen rotation, but when the screen rotates, the height of the status bar will be automatically modified to remove the high.

Vertical screen (4 inch): X=0, Y=20, width=320, height=548

Horizontal screen (4 inch): X=0,y=0, width=300, height=568

Screen size

CGRect rx = [UIScreen mainscreen].bounds;

(4 inch) rx=x=0, y=0, width=320, height=568

Fixed size, does not change with screen rotation

Status bar Size

CGRect rect;
rect = [[UIApplication sharedapplication] statusbarframe];

Always vertical to height.

Vertical screen (4 inch): X=0, Y=0, width=320, height=20

Horizontal screen (4 inch): x=300, Y=0, width=20, height=568

How to get screen resolution in iphone

CGRect rect = [[UIScreen mainscreen] bounds];
Cgsize size = rect.size;
CGFloat width = size.width;
CGFloat height = size.height;

Also, when designing the UI, pay attention to the user's smallest touch area. There are 2 ways to say

44*44 seems to be from the SDK.

64*64 from Standford Handouts

iOS screen, status bar (statusbar), program window size gain and screen rotation size change