YYCategories阅读代码
2016-06-20 02:48 Xiao彬 阅读(1743) 评论(0) 编辑 收藏 举报
1NSString+YYAdd
- (BOOL)containsString:(NSString *)string { if (string == nil) return NO; return [self rangeOfString:string].location != NSNotFound; }
2NSNumber+YYAdd
+ (NSNumber *)numberWithString:(NSString *)string { NSString *str = [[string stringByTrim] lowercaseString]; if (!str || !str.length) { return nil; } static NSDictionary *dic; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ dic = @{@"true" : @(YES), @"yes" : @(YES), @"false" : @(NO), @"no" : @(NO), @"nil" : [NSNull null], @"null" : [NSNull null], @"<null>" : [NSNull null]}; }); NSNumber *num = dic[str]; if (num) { if (num == (id)[NSNull null]) return nil; return num; } // hex number int sign = 0; if ([str hasPrefix:@"0x"]) sign = 1; else if ([str hasPrefix:@"-0x"]) sign = -1; if (sign != 0) { NSScanner *scan = [NSScanner scannerWithString:str]; unsigned num = -1; BOOL suc = [scan scanHexInt:&num]; if (suc) return [NSNumber numberWithLong:((long)num * sign)]; else return nil; } // normal number NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; [formatter setNumberStyle:NSNumberFormatterDecimalStyle]; return [formatter numberFromString:string]; }
3.NSArray+YYAdd
- (id)objectOrNilAtIndex:(NSUInteger)index { return index < self.count ? self[index] : nil; }
- (void)prependObjects:(NSArray *)objects { if (!objects) return; NSUInteger i = 0; for (id obj in objects) { [self insertObject:obj atIndex:i++]; } }
4.NSTimer+YYAdd
+ (void)_yy_ExecBlock:(NSTimer *)timer { if ([timer userInfo]) { void (^block)(NSTimer *timer) = (void (^)(NSTimer *timer))[timer userInfo]; block(timer); } } + (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds block:(void (^)(NSTimer *timer))block repeats:(BOOL)repeats { return [NSTimer scheduledTimerWithTimeInterval:seconds target:self selector:@selector(_yy_ExecBlock:) userInfo:[block copy] repeats:repeats]; } + (NSTimer *)timerWithTimeInterval:(NSTimeInterval)seconds block:(void (^)(NSTimer *timer))block repeats:(BOOL)repeats { return [NSTimer timerWithTimeInterval:seconds target:self selector:@selector(_yy_ExecBlock:) userInfo:[block copy] repeats:repeats]; }
5.NSNotificationCenter+YYAdd
- (void)postNotificationOnMainThreadWithName:(NSString *)name object:(id)object userInfo:(NSDictionary *)userInfo waitUntilDone:(BOOL)wait { if (pthread_main_np()) return [self postNotificationName:name object:object userInfo:userInfo]; NSMutableDictionary *info = [[NSMutableDictionary allocWithZone:nil] initWithCapacity:3]; if (name) [info setObject:name forKey:@"name"]; if (object) [info setObject:object forKey:@"object"]; if (userInfo) [info setObject:userInfo forKey:@"userInfo"]; [[self class] performSelectorOnMainThread:@selector(_yy_postNotificationName:) withObject:info waitUntilDone:wait]; }
6UIImage+YYAdd
+ (UIImage *)imageWithSize:(CGSize)size drawBlock:(void (^)(CGContextRef context))drawBlock { if (!drawBlock) return nil; UIGraphicsBeginImageContextWithOptions(size, NO, 0); CGContextRef context = UIGraphicsGetCurrentContext(); if (!context) return nil; drawBlock(context); UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; }
7.UIControl+YYAdd
- (NSMutableArray *)_yy_allUIControlBlockTargets { NSMutableArray *targets = objc_getAssociatedObject(self, &block_key); if (!targets) { targets = [NSMutableArray array]; objc_setAssociatedObject(self, &block_key, targets, OBJC_ASSOCIATION_RETAIN_NONATOMIC); } return targets; } - (void)removeAllTargets { [[self allTargets] enumerateObjectsUsingBlock: ^(id object, BOOL *stop) { [self removeTarget:object action:NULL forControlEvents:UIControlEventAllEvents]; }]; [[self _yy_allUIControlBlockTargets] removeAllObjects]; }
8.UIBarButtonItem+YYAdd
#import "UIBarButtonItem+YYAdd.h" #import "YYCategoriesMacro.h" #import <objc/runtime.h> YYSYNTH_DUMMY_CLASS(UIBarButtonItem_YYAdd) static const int block_key; @interface _YYUIBarButtonItemBlockTarget : NSObject @property (nonatomic, copy) void (^block)(id sender); - (id)initWithBlock:(void (^)(id sender))block; - (void)invoke:(id)sender; @end @implementation _YYUIBarButtonItemBlockTarget - (id)initWithBlock:(void (^)(id sender))block{ self = [super init]; if (self) { _block = [block copy]; } return self; } - (void)invoke:(id)sender { if (self.block) self.block(sender); }
@property (nullable, nonatomic, copy) void (^actionBlock)(id); - (void)setActionBlock:(void (^)(id sender))block { _YYUIBarButtonItemBlockTarget *target = [[_YYUIBarButtonItemBlockTarget alloc] initWithBlock:block]; objc_setAssociatedObject(self, &block_key, target, OBJC_ASSOCIATION_RETAIN_NONATOMIC); [self setTarget:target]; [self setAction:@selector(invoke:)]; } - (void (^)(id)) actionBlock { _YYUIBarButtonItemBlockTarget *target = objc_getAssociatedObject(self, &block_key); return target.block; }
9.UIView+YYAdd
- (void)removeAllSubviews { //[self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; while (self.subviews.count) { [self.subviews.lastObject removeFromSuperview]; } } - (UIViewController *)viewController { for (UIView *view = self; view; view = view.superview) { UIResponder *nextResponder = [view nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) { return (UIViewController *)nextResponder; } } return nil; }
10UITableView+YYAdd
- (void)clearSelectedRowsAnimated:(BOOL)animated { NSArray *indexs = [self indexPathsForSelectedRows]; [indexs enumerateObjectsUsingBlock:^(NSIndexPath* path, NSUInteger idx, BOOL *stop) { [self deselectRowAtIndexPath:path animated:animated]; }]; }
11UITextField+YYAdd
- (void)selectAllText { UITextRange *range = [self textRangeFromPosition:self.beginningOfDocument toPosition:self.endOfDocument]; [self setSelectedTextRange:range]; } - (void)setSelectedRange:(NSRange)range { UITextPosition *beginning = self.beginningOfDocument; UITextPosition *startPosition = [self positionFromPosition:beginning offset:range.location]; UITextPosition *endPosition = [self positionFromPosition:beginning offset:NSMaxRange(range)]; UITextRange *selectionRange = [self textRangeFromPosition:startPosition toPosition:endPosition]; [self setSelectedTextRange:selectionRange]; }
12
+ (CGFloat)screenScale { static CGFloat screenScale = 0.0; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ if ([NSThread isMainThread]) { screenScale = [[UIScreen mainScreen] scale]; } else { dispatch_sync(dispatch_get_main_queue(), ^{ screenScale = [[UIScreen mainScreen] scale]; }); } }); return screenScale; }