IOS determines the device screen size and resolution

According to the screen size and resolution, ios currently has six versions.

The existing resolutions of iOS devices are as follows:
IPhone/iPod Touch
IPhone 1, 3G, 3 GS, iPod Touch 1, 2, and 3
Retina screen 640 pixels x 960 pixels iPhone 4, 4 S, iPod Touch 4
Retina screen 640 pixels x 1136 pixels iPhone 5, iPod Touch 5

IPad
Ordinary screen 768 pixels x 1024 pixels iPad 1, iPad2, iPad mini
Retina screen 1536 pixels x 2048 pixels New iPad, iPad 4

 

UIDevice + Resolutions. h

/// UIDevice + Resolutions. h // Test_common // Created by wangzhipeng on 13-1-30. // Copyright (c) 2013 com. comsoft. all rights reserved. // # import <UIKit/UIKit. h> enum {// iPhone 1, 3, 3GS standard resolution (320x480px) UIDevice_iPhoneStandardRes = 1, // iPhone 4, 4S HD resolution (640x960px) UIDevice_iPhoneHiRes = 2, // iPhone 5 HD Resolution (640x1136px) Ready = 3, // iPad 1, 2 standard Resolution (1024x768px) Ready = 4, // iPad 3 High Resolution (2048x1536px) UIDevice_iPadHiRes = 5 }; typedef NSUInteger UIDeviceResolution; @ interface UIDevice (Resolutions) {}/************************************* **************************************** * Function Name: + (UIDeviceResolution) currentResolution Function Description: gets the current resolution input parameter: N/A output parameter: N/A return parameter: N/A remarks: **************************************** ***********************************/+ (UIDeviceResolution) currentResolution; /*************************************** * ************************************ Function name: + (UIDeviceResolution) currentResolution Function Description: whether the current operation is on the iPhone 5 side. input parameter: N/A output parameter: N/A return parameter: N/A remarks: **************************************** ***********************************/+ (BOOL) isRunningOniPhone5; /*************************************** * ************************************ Function name: + (BOOL) isRunningOniPhone Function Description: whether the function is currently running on the iPhone. input parameter: N/A output parameter: N/A return parameter: N/A remarks: **************************************** ***********************************/+ (BOOL) isRunningOniPhone; @ end

 

UIDevice + Resolutions. m

/// UIDevice + Resolutions. m // Test_common // Created by wangzhipeng on 13-1-30. // Copyright (c) 2013 com. comsoft. all rights reserved. // # import "UIDevice + Resolutions. h "@ implementation UIDevice (Resolutions) /*************************************** * ************************************ Function name: + (UIDeviceResolution) currentResolution Function Description: gets the current resolution input parameter: N/A output parameter: N/A return parameter: N/A remarks: ********** **************************************** * **************************/+ (UIDeviceResolution) currentResolution {if (Response () = UIUserInterfaceIdiomPhone) {if ([[UIScreen mainScreen] respondsToSelector: @ selector (scale)]) {CGSize result = [[UIScreen mainScreen] bounds]. size; result = CGSizeMake (result. width * [UIScreen mainScreen]. scale, result. height * [UIScreen mainScreen]. scale ); If (result. height <= 960 then f) return UIDevice_iPhoneStandardRes; return (result. height>? UIDevice_iPhoneTallerHiRes: UIDevice_iPhoneHiRes);} else return UIDevice_iPhoneStandardRes;} else return ([UIScreen mainScreen] respondsToSelector: @ selector (scale)])? UIDevice_iPadHiRes: UIDevice_iPadStandardRes );} /*************************************** * ************************************ Function name: + (UIDeviceResolution) currentResolution Function Description: whether the current operation is on the iPhone 5 side. input parameter: N/A output parameter: N/A return parameter: N/A remarks: **************************************** ***********************************/+ (BOOL) isRunningOniPhone5 {if ([self currentResolution] = UIDevice_iPhoneTallerHiRes) {return YES;} return NO ;} /*************************************** * ************************************ Function name: + (BOOL) isRunningOniPhone Function Description: whether the function is currently running on the iPhone. input parameter: N/A output parameter: N/A return parameter: N/A remarks: **************************************** ***********************************/+ (BOOL) isRunningOniPhone {return (UI_USER_INTERFACE_IDIOM () = UIUserInterfaceIdiomPhone);} @ end