#import
NS_ASSUME_NONNULL_BEGIN
/*
特殊字符串model
*/
@interface LYAttributeModel : NSObject
//带点击事件的字符串
@property(nonatomic, copy)NSString *string;
//带点击事件字符串的range
@property(nonatomic, assign)NSRange range;
@end
@interface UILabel (LYTouchAction)
//点击效果，默认是打开
@property(nonatomic)BOOL enabledTapEffect;
//特殊字符串字体颜色
@property(nonatomic, strong)UIColor *attributeColor;
//特殊字符串下划线
@property(nonatomic)BOOL underLine;
//特殊字符串删除线
@property(nonatomic)BOOL throughLine;
/**
* 给文本添加点击事件Block回调
*
* @param strings 需要添加的字符串数组
* @param tapClick 点击事件回调
*/
-(void)addAttributeTapActionWithStrings:(NSArray *)strings
tapClicked:(void (^) (NSString *string , NSRange range , NSInteger index))tapClick;
@end
NS_ASSUME_NONNULL_END
#import "UILabel+LYTouchAction.h"
#import
#import
#import
/*
特殊字符串model
*/
@implementation LYAttributeModel
@end
@implementation UILabel (LYTouchAction)
#pragma mark - AssociatedObjects ** <
-(NSMutableArray *)attributeStrings{
return objc_getAssociatedObject(self, _cmd);
}
-(void)setAttributeStrings:(NSMutableArray *)attributeStrings{
objc_setAssociatedObject(self, @selector(attributeStrings), attributeStrings, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
-(NSMutableDictionary *)effectDic{
return objc_getAssociatedObject(self, _cmd);
}
-(void)setEffectDic:(NSMutableDictionary *)effectDic{
objc_setAssociatedObject(self, @selector(effectDic), effectDic, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
//点击手势
-(BOOL)isTapAction{
return [objc_getAssociatedObject(self, _cmd) boolValue];
}
-(void)setIsTapAction:(BOOL)isTapAction{
objc_setAssociatedObject(self, @selector(isTapAction), @(isTapAction), OBJC_ASSOCIATION_ASSIGN);
}
//回调
-(void (^)(NSString *, NSRange, NSInteger))tapBlock{
return objc_getAssociatedObject(self, _cmd);
}
-(void)setTapBlock:(void (^)(NSString *, NSRange, NSInteger))tapBlock{
objc_setAssociatedObject(self, @selector(tapBlock), tapBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
//点击效果
-(BOOL)enabledTapEffect{
return [objc_getAssociatedObject(self, _cmd) boolValue];
}
-(void)setEnabledTapEffect:(BOOL)enabledTapEffect{
objc_setAssociatedObject(self, @selector(enabledTapEffect), @(enabledTapEffect), OBJC_ASSOCIATION_ASSIGN);
self.isTapEffect = enabledTapEffect;
}
-(BOOL)isTapEffect{
return [objc_getAssociatedObject(self, _cmd) boolValue];
}
-(void)setIsTapEffect:(BOOL)isTapEffect{
objc_setAssociatedObject(self, @selector(isTapEffect), @(isTapEffect), OBJC_ASSOCIATION_ASSIGN);
}
//特殊字符串字体颜色
-(UIColor *)attributeColor{
return objc_getAssociatedObject(self, _cmd);
}
-(void)setAttributeColor:(UIColor *)attributeColor{
objc_setAssociatedObject(self, @selector(attributeColor), attributeColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
//下划线
-(BOOL)underLine{
return [objc_getAssociatedObject(self, _cmd) boolValue];
}
-(void)setUnderLine:(BOOL)underLine{
objc_setAssociatedObject(self, @selector(underLine), @(underLine), OBJC_ASSOCIATION_ASSIGN);
}
//删除线
-(BOOL)throughLine{
return [objc_getAssociatedObject(self, _cmd) boolValue];
}
-(void)setThroughLine:(BOOL)throughLine{
objc_setAssociatedObject(self, @selector(throughLine), @(throughLine), OBJC_ASSOCIATION_ASSIGN);
}
#pragma mark - AssociatedObjects ** >
#pragma mark - 设置特殊字符串并获取回调结果
-(void)addAttributeTapActionWithStrings:(NSArray *)strings tapClicked:(void (^) (NSString *string , NSRange range , NSInteger index))tapClick{
//获取特殊字符串的Range
[self getRangesWithArrayStrings:strings];
//设置block回调
if (self.tapBlock != tapClick) {
self.tapBlock = tapClick;
}
}
#pragma mark - 为Label添加点击手势
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
//如果没有设置关键，则直接跳出，不添加手势
if (!self.isTapAction) {
return;
}
//获取点击效果是否开启
if (objc_getAssociatedObject(self, @selector(enabledTapEffect))) {
self.isTapEffect = self.enabledTapEffect;
}
//获取手势
UITouch *touch = [touches anyObject];
//在当前View获取点击位置
CGPoint point = [touch locationInView:self];
__weak typeof(self) weakSelf = self;
//
[self getTapFrameWithTouchPoint:point result:^(NSString *string, NSRange range, NSInteger index) {
if (weakSelf.tapBlock) {
weakSelf.tapBlock (string , range , index);
}
if (self.isTapEffect) {
[self saveEffectDicWithRange:range];
[self tapEffectWithStatus:YES];
}
}];
}
-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
if (self.isTapAction) {
if ([self getTapFrameWithTouchPoint:point result:nil]) {
return self;
}
}
return [super hitTest:point withEvent:event];
}
#pragma mark - getTapFrame
-(BOOL)getTapFrameWithTouchPoint:(CGPoint)point result:(void (^) (NSString *string , NSRange range , NSInteger index))resultBlock{
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)self.attributedText);
CGMutablePathRef Path = CGPathCreateMutable();
CGPathAddRect(Path, NULL, CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height));
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
CFRange range = CTFrameGetVisibleStringRange(frame);
if (self.attributedText.length > range.length) {
UIFont *font;
//获取字体大小
if ([self.attributedText attribute:NSFontAttributeName atIndex:0 effectiveRange:nil]) {
font = [self.attributedText attribute:NSFontAttributeName atIndex:0 effectiveRange:nil];
}else if (self.font){
font = self.font;
}else {
font = [UIFont systemFontOfSize:17];
}
CGPathRelease(Path);
Path = CGPathCreateMutable();
CGPathAddRect(Path, NULL, CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height + font.lineHeight));
frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
}
CFArrayRef lines = CTFrameGetLines(frame);
if (!lines) {
CFRelease(frame);
CFRelease(framesetter);
CGPathRelease(Path);
return NO;
}
CFIndex count = CFArrayGetCount(lines);
CGPoint origins[count];
CTFrameGetLineOrigins(frame, CFRangeMake(0, 0), origins);
CGAffineTransform transform = [self transformForCoreText];
CGFloat verticalOffset = 0;
for (CFIndex i = 0; i < count; i++) {
CGPoint linePoint = origins[i];
CTLineRef line = CFArrayGetValueAtIndex(lines, i);
CGRect flippedRect = [self getLineBounds:line point:linePoint];
CGRect rect = CGRectApplyAffineTransform(flippedRect, transform);
rect = CGRectInset(rect, 0, 0);
rect = CGRectOffset(rect, 0, verticalOffset);
NSParagraphStyle *style = [self.attributedText attribute:NSParagraphStyleAttributeName atIndex:0 effectiveRange:nil];
CGFloat lineSpace;
if (style) {
lineSpace = style.lineSpacing;
}else {
lineSpace = 0;
}
CGFloat lineOutSpace = (self.bounds.size.height - lineSpace * (count - 1) -rect.size.height * count) / 2;
rect.origin.y = lineOutSpace + rect.size.height * i + lineSpace * i;
if (CGRectContainsPoint(rect, point)) {
CGPoint relativePoint = CGPointMake(point.x - CGRectGetMinX(rect), point.y - CGRectGetMinY(rect));
CFIndex index = CTLineGetStringIndexForPosition(line, relativePoint);
CGFloat offset;
CTLineGetOffsetForStringIndex(line, index, &offset);
if (offset > relativePoint.x) {
index = index - 1;
}
NSInteger link_count = self.attributeStrings.count;
for (int j = 0; j < link_count; j++) {
LYAttributeModel *model = self.attributeStrings[j];
NSRange link_range = model.range;
if (NSLocationInRange(index, link_range)) {
if (resultBlock) {
resultBlock (model.string , model.range , (NSInteger)j);
}
CFRelease(frame);
CFRelease(framesetter);
CGPathRelease(Path);
return YES;
}
}
}
}
CFRelease(frame);
CFRelease(framesetter);
CGPathRelease(Path);
return NO;
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
if (self.isTapEffect) {
[self performSelectorOnMainThread:@selector(tapEffectWithStatus:) withObject:nil waitUntilDone:NO];
}
}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
if (self.isTapEffect) {
[self performSelectorOnMainThread:@selector(tapEffectWithStatus:) withObject:nil waitUntilDone:NO];
}
}
-(CGAffineTransform)transformForCoreText{
return CGAffineTransformScale(CGAffineTransformMakeTranslation(0, self.bounds.size.height), 1.f, -1.f);
}
-(CGRect)getLineBounds:(CTLineRef)line point:(CGPoint)point{
CGFloat ascent = 0.0f;
CGFloat descent = 0.0f;
CGFloat leading = 0.0f;
CGFloat width = (CGFloat)CTLineGetTypographicBounds(line, &ascent, &descent, &leading);
CGFloat height = ascent + fabs(descent) + leading;
return CGRectMake(point.x, point.y , width, height);
}
#pragma mark - tapEffect
-(void)tapEffectWithStatus:(BOOL)status{
if (self.isTapEffect) {
NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
NSMutableAttributedString *subAtt = [[NSMutableAttributedString alloc] initWithAttributedString:[[self.effectDic allValues] firstObject]];
NSRange range = NSRangeFromString([[self.effectDic allKeys] firstObject]);
//点击效果的背景颜色
if (status) {
[subAtt addAttribute:NSBackgroundColorAttributeName value:[UIColor groupTableViewBackgroundColor] range:NSMakeRange(0, subAtt.string.length)];
[attStr replaceCharactersInRange:range withAttributedString:subAtt];
}else {
[attStr replaceCharactersInRange:range withAttributedString:subAtt];
}
self.attributedText = attStr;
}
}
-(void)saveEffectDicWithRange:(NSRange)range{
self.effectDic = [NSMutableDictionary dictionary];
NSAttributedString *subAttribute = [self.attributedText attributedSubstringFromRange:range];
[self.effectDic setObject:subAttribute forKey:NSStringFromRange(range)];
}
#pragma mark - 获取特殊字符串的Range
-(void)getRangesWithArrayStrings:(NSArray *)arrayStrings{
//容错处理
if (self.attributedText == nil) {
self.isTapAction = NO;
return;
}
//添加手势
self.isTapAction = YES;
//添加点击效果
self.isTapEffect = YES;
//设置弱引用接收字符串
__block NSString *totalStr = self.attributedText.string;
//初始化可变数组存储特殊字符串
self.attributeStrings = [NSMutableArray array];
__weak typeof(self) weakSelf = self;
//开始遍历整个字符串，获取到对应的特殊字符串和对应的range，并存到self.attributeStrings可变数组中
[arrayStrings enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
//获取到对应特殊字符串的range
NSRange range = [totalStr rangeOfString:obj];
//特殊字符串存在，则继续处理
if (range.length != 0) {
//特殊字符串用空格替换掉
totalStr = [totalStr stringByReplacingCharactersInRange:range withString:[weakSelf getStringWithRange:range]];
//获取特殊字符串的位置和内容，并存储到可变数组中
LYAttributeModel *model = [LYAttributeModel new];
model.range = range;
model.string = obj;
[weakSelf.attributeStrings addObject:model];
}
}];
// NSLog(@"throughLine = %@",self.throughLine ? @"yes" : @"no");
//修改特殊字符串字体颜色
if (self.attributeColor) {
for (int i = 0; i < self.attributeStrings.count; i ++) {
LYAttributeModel *model = self.attributeStrings[i];
NSMutableAttributedString *mutAttr = [[NSMutableAttributedString alloc]initWithAttributedString:self.attributedText];
[mutAttr addAttribute:NSForegroundColorAttributeName value:self.attributeColor range:model.range];
//特殊字符串添加下划线
if (self.underLine) {
[mutAttr addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:model.range];
}
//特殊字符串添加删除线
if (self.throughLine) {
[mutAttr addAttributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleSingle),
NSBaselineOffsetAttributeName:@(0)}
range:model.range];
}
self.attributedText = mutAttr;
}
}
}
-(NSString *)getStringWithRange:(NSRange)range{
NSMutableString *string = [NSMutableString string];
for (int i = 0; i < range.length ; i++) {
[string appendString:@" "];
}
return string;
}
@end
