本文已参与「新人创作礼」活动，一起开启掘金创作之路。
1.获取屏幕宽度与高度（横竖屏）
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 // 当前Xcode支持iOS8及以上
#define SCREEN_WIDTH ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.width/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.width)
#define SCREENH_HEIGHT ([[UIScreen mainScreen] respondsToSelector:@selector(nativeBounds)]?[UIScreen mainScreen].nativeBounds.size.height/[UIScreen mainScreen].nativeScale:[UIScreen mainScreen].bounds.size.height)
#define SCREEN_SIZE ([[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)
#else
#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width
#define SCREENH_HEIGHT [UIScreen mainScreen].bounds.size.height
#define SCREEN_SIZE [UIScreen mainScreen].bounds.size
#endif
2.获取通知中心
#define LRNotificationCenter [NSNotificationCenter defaultCenter]
3.设置随机颜色
#define LRRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]
4.设置RGB颜色/设置RGBA颜色
#define LRRGBColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define LRRGBAColor(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:a]
// clear背景颜色
#define LRClearColor [UIColor clearColor]
5.判断是否为iPhone
#define kISiPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
6.判断是否为iPad
#define kISiPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
7.用户偏好设置
#define kUserDefaults [NSUserDefaults standardUserDefaults]
8.通知中心
#define kNotificationCenter [NSNotificationCenter defaultCenter]
9.APP版本号
#define kAppVersion [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]
10.设备版本号
#define kSystemVersion [[UIDevice currentDevice] systemVersion]
11.获取当前语言
#define kCurrentLanguage ([[NSLocale preferredLanguages] objectAtIndex:0])
12.获取沙盒Document路径
#define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
13.获取沙盒temp路
#define kTempPath NSTemporaryDirectory()
14.获取沙盒Cache路径
#define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
15.//Debug模式下打印日志,当前行,函数名 并弹出一个警告框
#ifdef DEBUG
# define NSLog(fmt, ...) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"%s\n [Line %d] ", __PRETTY_FUNCTION__, __LINE__] message:[NSString stringWithFormat:fmt, ##__VA_ARGS__] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; }
#else
# define NSLog(...)
#endif
16.字符串是否为空
#define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )
17.数组是否为空
#define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)
18.字典是否为空
#define kDictIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)
19.是否是空对象
#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))
20.弱引用/强引用
#define kWeakSelf(type) __weak typeof(type) weak##type = type;
#define kStrongSelf(type) __strong typeof(type) type = weak##type;
21.由角度转换弧度
#define kDegreesToRadian(x) (M_PI * (x) / 180.0)
22.由弧度转换角度
#define kRadianToDegrees(radian) (radian * 180.0) / (M_PI)
//归档解档
#define CODING(self)\
\
-(void)encodeWithCoder:(NSCoder *)aCoder{\
unsigned int count;\
Ivar *list = class_copyIvarList([self class], &count);\
for (int i = 0; i<count; i++) {\
Ivar iv = list[i];\
const char *name = ivar_getName(iv);\
NSString *nameStr = [NSString stringWithUTF8String:name];\
id value = [self valueForKey:nameStr];\
[aCoder encodeObject:value forKey:nameStr];\
}\
free(list);\
NSLog(@"归档%@..",[self class]);\
\
}\
-(instancetype)initWithCoder:(NSCoder *)aDecoder{\
if (self == [super init]) {\
unsigned int count;\
Ivar *list = class_copyIvarList([self class], &count);\
for (int i = 0; i<count; i++) {\
Ivar iv = list[i];\
const char *name = ivar_getName(iv);\
NSString *nameStr = [NSString stringWithUTF8String:name];\
id value = [aDecoder decodeObjectForKey:nameStr];\
[self setValue:value forKey:nameStr];\
}\
free(list);\
}\
NSLog(@"解档%@..",[self class]);\
\
return self;\
}
24.iOS11.0系统下的iPhone-X
#define ScreenWidth [[UIScreen mainScreen] bounds].size.width
#define ScreenHeight [[UIScreen mainScreen] bounds].size.height
#define Is_Iphone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
#define Is_Iphone_X (Is_Iphone && ScreenHeight == 812.0)
#define NaviHeight Is_Iphone_X ? 88 : 64
#define TabbarHeight Is_Iphone_X ? 83 : 49
#define BottomHeight Is_Iphone_X ? 34 : 0
