源代码：https://github.com/lyb5834/YBAttributeTextTapAction地址
如果想用富文本文件，可以参考的另外一篇博客;
https://www.cnblogs.com/hualuoshuijia/p/5732619.html
如果只需要做点击，只需要使用一个类别文件就可以
#import <UIKit/UIKit.h> @protocol RichTextDelegate <NSObject>
@optional
/**
* RichTextDelegate
*
* @param string 点击的字符串
* @param range 点击的字符串range
* @param index 点击的字符在数组中的index
*/
- (void)didClickRichText:(NSString *)string
range:(NSRange)range
index:(NSInteger)index;
@end @interface UILabel (RichText) /**
* 是否打开点击效果，默认是打开
*/
@property (nonatomic, assign) BOOL enabledClickEffect; /**
* 点击效果颜色 默认lightGrayColor
*/
@property (nonatomic, strong) UIColor *clickEffectColor; /**
* 给文本添加Block点击事件回调
*
* @param strings 需要添加的字符串数组
* @param clickAction 点击事件回调
*/
- (void)clickRichTextWithStrings:(NSArray <NSString *> *)strings
clickAction:(void (^) (NSString *string, NSRange range, NSInteger index))clickAction; /**
* 给文本添加点击事件delegate回调
*
* @param strings 需要添加的字符串数组
* @param delegate 富文本代理
*/
- (void)clickRichTextWithStrings:(NSArray <NSString *> *)strings
delegate:(id <RichTextDelegate> )delegate;
#import "UILabel+RichText.h"
#import <objc/runtime.h>
#import <CoreText/CoreText.h>
#import <Foundation/Foundation.h> #define weakSelf(type) __weak typeof(type) weak##type = type; @interface RichTextModel : NSObject @property (nonatomic, copy) NSString *str; @property (nonatomic, assign) NSRange range; @end @implementation RichTextModel @end @implementation UILabel (RichText) #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);
} - (BOOL)isClickAction { return [objc_getAssociatedObject(self, _cmd) boolValue];
} - (void)setIsClickAction:(BOOL)isClickAction { objc_setAssociatedObject(self, @selector(isClickAction), @(isClickAction), OBJC_ASSOCIATION_ASSIGN);
} - (void (^)(NSString *, NSRange, NSInteger))clickBlock { return objc_getAssociatedObject(self, _cmd);
} - (void)setClickBlock:(void (^)(NSString *, NSRange, NSInteger))clickBlock { objc_setAssociatedObject(self, @selector(clickBlock), clickBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
} - (id<RichTextDelegate>)delegate { return objc_getAssociatedObject(self, _cmd);
} - (BOOL)enabledClickEffect { return [objc_getAssociatedObject(self, _cmd) boolValue];
} - (void)setEnabledClickEffect:(BOOL)enabledClickEffect { objc_setAssociatedObject(self, @selector(enabledClickEffect), @(enabledClickEffect), OBJC_ASSOCIATION_ASSIGN);
// self.isClickEffect = enabledClickEffect;
} - (UIColor *)clickEffectColor { UIColor *obj = objc_getAssociatedObject(self, _cmd);
if(obj == nil) {obj = [UIColor lightGrayColor];}
return obj;
} - (void)setClickEffectColor:(UIColor *)clickEffectColor { objc_setAssociatedObject(self, @selector(clickEffectColor), clickEffectColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
} - (BOOL)isClickEffect { return [objc_getAssociatedObject(self, _cmd) boolValue];
} - (void)setIsClickEffect:(BOOL)isClickEffect { objc_setAssociatedObject(self, @selector(isClickEffect), @(isClickEffect), OBJC_ASSOCIATION_ASSIGN);
} - (void)setDelegate:(id<RichTextDelegate>)delegate { objc_setAssociatedObject(self, @selector(delegate), delegate, OBJC_ASSOCIATION_ASSIGN);
} #pragma mark - mainFunction
- (void)clickRichTextWithStrings:(NSArray<NSString *> *)strings clickAction:(void (^)(NSString *, NSRange, NSInteger))clickAction { [self richTextRangesWithStrings:strings]; if (self.clickBlock != clickAction) {
self.clickBlock = clickAction;
}
} - (void)clickRichTextWithStrings:(NSArray<NSString *> *)strings delegate:(id<RichTextDelegate>)delegate { [self richTextRangesWithStrings:strings]; if ([self delegate] != delegate) { [self setDelegate:delegate];
}
} #pragma mark - touchAction
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (!self.isClickAction) {
return;
} if (objc_getAssociatedObject(self, @selector(enabledClickEffect))) {
self.isClickEffect = self.enabledClickEffect;
} UITouch *touch = [touches anyObject]; CGPoint point = [touch locationInView:self]; weakSelf(self);
[self richTextFrameWithTouchPoint:point result:^(NSString *string, NSRange range, NSInteger index) { if (weakself.clickBlock) {
weakself.clickBlock (string , range , index);
} if ([weakself delegate] && [[weakself delegate] respondsToSelector:@selector(didClickRichText:range:index:)]) {
[[weakself delegate] didClickRichText:string range:range index:index];
} if (weakself.isClickEffect) { [weakself saveEffectDicWithRange:range]; [weakself clickEffectWithStatus:YES];
}
}];
} - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { if((self.isClickAction) && ([self richTextFrameWithTouchPoint:point result:nil])) { return self;
}
return [super hitTest:point withEvent:event];
} #pragma mark - getClickFrame
- (BOOL)richTextFrameWithTouchPoint:(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 ; 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++) { RichTextModel *model = self.attributeStrings[j]; NSRange link_range = model.range;
if (NSLocationInRange(index, link_range)) {
if (resultBlock) {
resultBlock (model.str , model.range , (NSInteger)j);
}
CFRelease(frame);
CFRelease(framesetter);
CGPathRelease(Path);
return YES;
}
}
}
}
CFRelease(frame);
CFRelease(framesetter);
CGPathRelease(Path);
return NO;
} - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.isClickEffect) { [self performSelectorOnMainThread:@selector(clickEffectWithStatus:) withObject:nil waitUntilDone:NO];
}
} - (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.isClickEffect) { [self performSelectorOnMainThread:@selector(clickEffectWithStatus:) 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 - clickEffect
- (void)clickEffectWithStatus:(BOOL)status
{
if (self.isClickEffect) {
NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText]; NSMutableAttributedString *subAtt = [[NSMutableAttributedString alloc] initWithAttributedString:[[self.effectDic allValues] firstObject]]; NSRange range = NSRangeFromString([[self.effectDic allKeys] firstObject]); if (status) {
[subAtt addAttribute:NSBackgroundColorAttributeName value:self.clickEffectColor 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 - getRange
- (void)richTextRangesWithStrings:(NSArray <NSString *> *)strings
{
if (self.attributedText == nil) {
self.isClickAction = NO;
return;
} self.isClickAction = YES; self.isClickEffect = YES; __block NSString *totalStr = self.attributedText.string; self.attributeStrings = [NSMutableArray array]; weakSelf(self);
[strings enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { NSRange range = [totalStr rangeOfString:obj]; if (range.length != 0) { totalStr = [totalStr stringByReplacingCharactersInRange:range withString:[weakself getStringWithRange:range]]; RichTextModel *model = [[RichTextModel alloc]init]; model.range = range; model.str = obj; [weakself.attributeStrings addObject:model];
}
}];
} - (NSString *)getStringWithRange:(NSRange)range
{
NSMutableString *string = [NSMutableString string]; for (int i = 0; i < range.length ; i++) { [string appendString:@" "];
}
return string;
} @end
使用方法：
NSString *text = @"池塘大桥下，游过一群鸭池塘，快来快来数一数，二四六七八，嘎嘎嘎嘎，真呀真多呀，fly，数不清到底多少鸭";
NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:text];
[string addAttribute:action1 value:@"" range:NSMakeRange(2, 3)];
[string addAttributes:@{NSStrikethroughStyleAttributeName:@"",NSForegroundColorAttributeName:[UIColor redColor]} range:NSMakeRange(2, 3)];
self.label2.userInteractionEnabled = true;
self.label2.attributedText = string;
// self.label2.enabledClickEffect = false;
[self.label2 clickRichTextWithStrings:@[@"池塘"] clickAction:^(NSString *string, NSRange range, NSInteger index) {
NSLog(@"-------");
}];
如果想用富文本文件，可以参考的另外一篇博客;