//字串是否為空
#define kstringisempty(str) ([str iskindofclass:[nsnull class]] || str == nil || [str length] < 1 ? yes : no )
//陣列是否為空
#define karrayisempty(array) (array == nil || [array iskindofclass:[nsnull class]] || array.count == 0)
//字典是否為空
#define kdictisempty(dic) (dic == nil || [dic iskindofclass:[nsnull class]] || dic.allkeys == 0)
//是否是空物件
#define kobjectisempty(_object) (_object == nil \
|| [_object iskindofclass:[nsnull class]] \
|| ([_object respondstoselector:@selector(length)] && [(nsdata *)_object length] == 0) \
|| ([_object respondstoselector:@selector(count)] && [(nsarray *)_object count] == 0))
//獲取螢幕寬度與高度
#define kscreenwidth \
([[uiscreen mainscreen] respondstoselector:@selector(nativebounds)] ? [uiscreen mainscreen].nativebounds.size.width/[uiscreen mainscreen].nativescale : [uiscreen mainscreen].bounds.size.width)
#define kscreenheight \
([[uiscreen mainscreen] respondstoselector:@selector(nativebounds)] ? [uiscreen mainscreen].nativebounds.size.height/[uiscreen mainscreen].nativescale : [uiscreen mainscreen].bounds.size.height)
#define kscreensize \
([[uiscreen mainscreen] respondstoselector:@selector(nativebounds)] ? cgsizemake([uiscreen mainscreen].nativebounds.size.width/[uiscreen mainscreen].nativescale,[uiscreen mainscreen].nativebounds.size.height/[uiscreen mainscreen].nativescale) : [uiscreen mainscreen].bounds.size)
//一些縮寫
#define kuserdefaults [nsuserdefaults standarduserdefaults]
#define knotificationcenter [nsnotificationcenter defaultcenter]
//系統版本號
#define ksystemversion [[uidevice currentdevice] systemversion]
//獲取當前語言
#define kcurrentlanguage ([[nslocale preferredlanguages] objectatindex:0])
//判斷是否為iphone
#define kisiphone (ui_user_inte***ce_idiom() == uiuserinte***ceidiomphone)
//判斷是否為ipad
#define kisipad (ui_user_inte***ce_idiom() == uiuserinte***ceidiompad)
//獲取沙盒document路徑
#define kdocumentpath [nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes) firstobject]
//獲取沙盒temp路徑
#define ktemppath nstemporarydirectory()
//獲取沙盒cache路徑
#define kcachepath [nssearchpathfordirectoriesindomains(nscachesdirectory, nsuserdomainmask, yes) firstobject]
//判斷是真機還是模擬器
#if target_os_iphone
//真機
#endif
#if target_iphone_simulator
//模擬器
#endif
//開發的時候列印，但是發布的時候不列印的nslog
#ifdef debug
#define nslog(...) nslog(@"%s 第%d行 \n %@\n\n",__func__,__line__,[nsstring stringwithformat:__va_args__])
#else
#define nslog(...)
#endif
//顏色
#define krgbcolor(r, g, b) [uicolor colorwithred:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define krgbacolor(r, g, b, a) [uicolor colorwithred:(r)/255.0 green:(r)/255.0 blue:(r)/255.0 alpha:a]
#define krandomcolor krgbcolor(arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0,arc4random_uniform(256)/255.0)
#define kcolorwithhex(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]
//弱引用/強引用
#define kweakself(type) __weak typeof(type) weak##type = type;
#define kstrongself(type) __strong typeof(type) type = weak##type;
//由角度轉換弧度
#define kdegreestoradian(x) (m_pi * (x) / 180.0)
//由弧度轉換角度
#define kradiantodegrees(radian) (radian * 180.0) / (m_pi)
//獲取一段時間間隔
#define kstarttime cfabsolutetime start = cfabsolutetimegetcurrent();
#define kendtime nslog(@"time: %f", cfabsolutetimegetcurrent() - start)
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