Common macro definitions for iOS development

#define NAVIGATIONBAR_HEIGHT 44//navigation bar height

#define SCREEN_WIDTH ([UIScreen mainscreen].bounds.size.width)//Dynamic acquisition of the width of the physical device

#define Screen_height ([UIScreen mainscreen].bounds.size.height)//dynamic acquisition of the height of the physical device

#define SAFE_RELEASE (x) [x RELEASE]; x=Nil//safe release

#define Ios_version [[[Uidevice Currentdevice] systemversion] floatvalue]//Get current device system version

#define CURRENTLANGUAGE ([[Nslocale preferredlanguages] objectatindex:0])//Get the current device language

#define Background_color [Uicolor colorwithred:242.0/255.0 green:236.0/255.0 blue:231.0/255.0 alpha:1.0]//Background color

#define SAFE_DELETE (P) if (p) {[P release], p = Nil;} Safely delete objects

#define COLOR (R, G, B, A) [Uicolor colorwithred:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]//Colour values with RGBA

#define UICOLORFROMRGB (rgbvalue) [Uicolor colorwithred: ((float) ((Rgbvalue & 0xFF0000) >> 16)/255.0  Green: ((float) ((Rgbvalue & 0xff00) >> 8)/255.0 Blue: ((float) (Rgbvalue & 0xFF))/255.0 alpha:1.0] RGB color conversion (16 binary to 10 binary)

#define Clearcolor [Uicolor Clearcolor]//clear background color

#define Alertcontent (content) Uialertview *alert = [[Uialertview alloc] initwithtitle:@ "hint" \

Message:content \

Delegate:nil \

cancelbuttontitle:@ "OK" \

Otherbuttontitles:nil]; \

[Alert show]; \

Warning Box content prompt

#define Degreestoradian (x) (M_PI * (x)/180.0)//angle to radians

#define Radiantodegrees (Radian) (radian*180.0)/(M_PI)//Radian Turn angle

The following three macros are used to determine the device type

#define Isretina ([UIScreen instancesrespondtoselector: @selector (currentmode)]? Cgsizeequaltosize (Cgsizemake (640, 960), [[UIScreen Mainscreen] currentmode].size): NO)

#define IPHONE5 ([UIScreen instancesrespondtoselector: @selector (currentmode)]? Cgsizeequaltosize (Cgsizemake (640, 1136), [[UIScreen Mainscreen] currentmode].size): NO)

#define ISPAD (ui_user_interface_idiom () = = Uiuserinterfaceidiompad)

Common macro definitions for iOS development