UILabel+attributeTextAction.h
#import <UIKit/UIKit.h>
@interface TextModel : NSObject
@property (nonatomic, copy) NSString *str;
@property (nonatomic, assign) NSRange range;
@end
@interface UILabel (attributeTextAction)
/**
给文本添加点击事件（使用字符串标记）
@param strings 需要添加点击事件的字符串数组
@param tapClick 点击的回调block
*/
- (void)addAttributeActionWithStrings:(NSArray *)strings
tapTargetAction:(void (^) (NSString *string , NSRange range ,
NSInteger index))tapClick;
/**
给文本添加点击事件（使用范围标记）
@param tapRange 需要添加点击事件的范围数组
@param tapClick 点击的回调block
*/
- (void)addAttributeActionWithRange:(NSArray*)tapRange
tapTargetAction:(void (^)
(NSString *string , NSRange range , NSInteger index))tapClick;
@end
#import "UILabel+attributeTextAction.h"
#import <objc/runtime.h>
#import <CoreText/CoreText.h>
#import <Foundation/Foundation.h>
@implementation TextModel
@end
@implementation UILabel (attributeTextAction)
#pragma mark - AssociatedObjects
- (NSMutableArray *)attributeStrings
{
return objc_getAssociatedObject(self, _cmd);
}
- (void)setAttributeStrings:(NSMutableArray *)attributeStrings
{
objc_setAssociatedObject(self, @selector(attributeStrings), attributeStrings, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (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);
}
#pragma mark - mainFunction
- (void)addAttributeActionWithStrings:(NSArray *)strings
tapTargetAction:(void (^) (NSString *string ,NSRange range ,NSInteger index))tapClick
{
[self getRangesWithStrings:strings];
if (self.tapBlock != tapClick) {
self.tapBlock = tapClick;
}
}
- (void)addAttributeActionWithRange:(NSArray*)tapRange
tapTargetAction:(void (^)(NSString *
string , NSRange range , NSInteger index))tapClick
{
__block NSString *totalStr = self.attributedText.string;
NSMutableArray *stringArray = [[NSMutableArray alloc] init];
for (NSValue *value in tapRange) {
NSRange range = [value rangeValue];
NSString *subString = [totalStr substringWithRange:range];
[stringArray addObject:subString];
}
[self getRangesWithStrings:stringArray];
if (self.tapBlock != tapClick) {
self.tapBlock = tapClick;
}
}
#pragma mark - getRange
- (void)getRangesWithStrings:(NSArray <NSString *> *)strings
{
__block NSString *totalStr = self.attributedText.string;
self.attributeStrings = [NSMutableArray array];
__weak typeof(self) 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]];
TextModel *model = [[TextModel 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;
}
#pragma mark - touchAction
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
__weak typeof(self) weakSelf = self;
[self yb_getTapFrameWithTouchPoint:point result:^(NSString *string, NSRange range, NSInteger index) {
if (weakSelf.tapBlock) {
weakSelf.tapBlock (string , range , index);
}
// if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(yb_attributeTapReturnString:range:index:)]) {
// [weakSelf.delegate yb_attributeTapReturnString:string range:range index:index];
// }
}];
}
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
// if (self.isTapAction) {
if ([self yb_getTapFrameWithTouchPoint:point result:nil]) {
return self;
}
// }
return [super hitTest:point withEvent:event];
}
#pragma mark - getTapFrame
- (BOOL)yb_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 ;
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 yb_transformForCoreText];
CGFloat verticalOffset = 0;
for (CFIndex i = 0; i < count; i++) {
CGPoint linePoint = origins[i];
CTLineRef line = CFArrayGetValueAtIndex(lines, i);
CGRect flippedRect = [self yb_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++) {
TextModel *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.isTapEffect) {
//
// [self performSelectorOnMainThread:@selector(yb_tapEffectWithStatus:) withObject:nil waitUntilDone:NO];
//
// }
//}
//
//- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
//{
// if (self.isTapEffect) {
//
// [self performSelectorOnMainThread:@selector(yb_tapEffectWithStatus:) withObject:nil waitUntilDone:NO];
//
// }
//}
- (CGAffineTransform)yb_transformForCoreText
{
return CGAffineTransformScale(CGAffineTransformMakeTranslation(0, self.bounds.size.height), 1.f, -1.f);
}
- (CGRect)yb_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);
}
@end
