iOS 小知识-tips

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arc的项目中使用非arc代码，则添加-fno-objc-arc；

非arc项目中使用arc代码，则添加-fobjc-arc。

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实用的类

NSKeyedArchiver

[UIScreen mainScreen]

[UIDevice currentDevice]

[UIFont familyNames]

[UIApplication sharedApplication]

[NSUserDefaults standardUserDefaults]

[NSNotificationCenter defaultCenter]

[NSBundle mainBundle]

[NSLocale preferredLanguages]

便利的宏

#define rgba(r,g,b,a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:(a)]

//程序沙盒 NSHomeDirectory()

#define LLC_SandBox_Document NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0]

#define LLC_SandBox_Library NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0]

#define LLC_SandBox_Temp NSTemporaryDirectory()

/** DEBUG LOG **/

#ifdef DEBUG

#define DLog( s, ... ) NSLog( @"< %@(%d)(%s) >\n%@", [[NSString stringWithUTF8String:__FILE__] lastPathComponent],__LINE__,__PRETTY_FUNCTION__ , [NSString stringWithFormat:(s), ##__VA_ARGS__] )

#else

#define DLog( s, ... )

#endif

#define BACK(block) dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block)

#define MAIN(block) dispatch_async(dispatch_get_main_queue(),block)

#define IMGBGLS(tpImg) (tpImg) = [(tpImg) stretchableImageWithLeftCapWidth:floorf((tpImg).size.width/2) topCapHeight:floorf((tpImg).size.height/2)]　　//从1/2的宽，1/2的高方向，拉伸图片

#define FilterHtmlText(x) (x)=[[(x) componentsSeparatedByCharactersInSet: [NSCharacterSet characterSetWithCharactersInString:@"[]{}（<p><br/></p>#%-*+=_）\\|~(＜＞$%^&*)_+ "]]componentsJoinedByString: @""]

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