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for used in touchable view #14

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225 changes: 114 additions & 111 deletions FRHyperLabel/FRHyperLabel.m
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Original file line number Diff line number Diff line change
Expand Up @@ -24,163 +24,166 @@ @implementation FRHyperLabel
static UIColor *FRHyperLabelLinkColorHighlight;

+ (void)initialize {
if (self == [FRHyperLabel class]) {
FRHyperLabelLinkColorDefault = [UIColor colorWithRed:28/255.0 green:135/255.0 blue:199/255.0 alpha:1];
FRHyperLabelLinkColorHighlight = [UIColor colorWithRed:242/255.0 green:183/255.0 blue:73/255.0 alpha:1];
}
if (self == [FRHyperLabel class]) {
FRHyperLabelLinkColorDefault = [UIColor colorWithRed:28/255.0 green:135/255.0 blue:199/255.0 alpha:1];
FRHyperLabelLinkColorHighlight = [UIColor colorWithRed:242/255.0 green:183/255.0 blue:73/255.0 alpha:1];
}
}

- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self checkInitialization];
}
return self;
self = [super initWithFrame:frame];
if (self) {
[self checkInitialization];
}
return self;
}

- (instancetype)initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (self) {
[self checkInitialization];
}
return self;
self = [super initWithCoder:coder];
if (self) {
[self checkInitialization];
}
return self;
}

- (void)checkInitialization {
if (!self.handlerDictionary) {
self.handlerDictionary = [NSMutableDictionary new];
}
if (!self.userInteractionEnabled) {
self.userInteractionEnabled = YES;
}
if (!self.linkAttributeDefault) {
self.linkAttributeDefault = @{NSForegroundColorAttributeName: FRHyperLabelLinkColorDefault,
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
}
if (!self.linkAttributeHighlight) {
self.linkAttributeHighlight = @{NSForegroundColorAttributeName: FRHyperLabelLinkColorHighlight,
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
}
if (!self.handlerDictionary) {
self.handlerDictionary = [NSMutableDictionary new];
}

if (!self.userInteractionEnabled) {
self.userInteractionEnabled = YES;
}

if (!self.linkAttributeDefault) {
self.linkAttributeDefault = @{NSForegroundColorAttributeName: FRHyperLabelLinkColorDefault,
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
}

if (!self.linkAttributeHighlight) {
self.linkAttributeHighlight = @{NSForegroundColorAttributeName: FRHyperLabelLinkColorHighlight,
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
}
}

#pragma mark - APIs

- (void)clearActionDictionary {
[self.handlerDictionary removeAllObjects];
[self.handlerDictionary removeAllObjects];
}

//designated setter
- (void)setLinkForRange:(NSRange)range withAttributes:(NSDictionary *)attributes andLinkHandler:(void (^)(FRHyperLabel *label, NSRange selectedRange))handler {
NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc]initWithAttributedString:self.attributedText];
if (attributes) {
[mutableAttributedString addAttributes:attributes range:range];
}
if (handler) {
[self.handlerDictionary setObject:handler forKey:[NSValue valueWithRange:range]];
}
self.attributedText = mutableAttributedString;
NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc]initWithAttributedString:self.attributedText];

if (attributes) {
[mutableAttributedString addAttributes:attributes range:range];
}

if (handler) {
[self.handlerDictionary setObject:handler forKey:[NSValue valueWithRange:range]];
}

self.attributedText = mutableAttributedString;
}

- (void)setLinkForRange:(NSRange)range withLinkHandler:(void(^)(FRHyperLabel *label, NSRange selectedRange))handler {
[self setLinkForRange:range withAttributes:self.linkAttributeDefault andLinkHandler:handler];
[self setLinkForRange:range withAttributes:self.linkAttributeDefault andLinkHandler:handler];
}

- (void)setLinkForSubstring:(NSString *)substring withAttribute:(NSDictionary *)attribute andLinkHandler:(void(^)(FRHyperLabel *label, NSString *substring))handler {
NSRange range = [self.attributedText.string rangeOfString:substring];
if (range.length) {
[self setLinkForRange:range withAttributes:attribute andLinkHandler:^(FRHyperLabel *label, NSRange range){
handler(label, [label.attributedText.string substringWithRange:range]);
}];
}
NSRange range = [self.attributedText.string rangeOfString:substring];
if (range.length) {
[self setLinkForRange:range withAttributes:attribute andLinkHandler:^(FRHyperLabel *label, NSRange range){
handler(label, [label.attributedText.string substringWithRange:range]);
}];
}
}

- (void)setLinkForSubstring:(NSString *)substring withLinkHandler:(void(^)(FRHyperLabel *label, NSString *substring))handler {
[self setLinkForSubstring:substring withAttribute:self.linkAttributeDefault andLinkHandler:handler];
[self setLinkForSubstring:substring withAttribute:self.linkAttributeDefault andLinkHandler:handler];
}

- (void)setLinksForSubstrings:(NSArray *)linkStrings withLinkHandler:(void(^)(FRHyperLabel *label, NSString *substring))handler {
for (NSString *linkString in linkStrings) {
[self setLinkForSubstring:linkString withLinkHandler:handler];
}
for (NSString *linkString in linkStrings) {
[self setLinkForSubstring:linkString withLinkHandler:handler];
}
}

#pragma mark - Event Handler

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
self.backupAttributedText = self.attributedText;
for (UITouch *touch in touches) {
CGPoint touchPoint = [touch locationInView:self];
NSValue *rangeValue = [self attributedTextRangeForPoint:touchPoint];
if (rangeValue) {
NSRange range = [rangeValue rangeValue];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithAttributedString:self.attributedText];
[attributedString addAttributes:self.linkAttributeHighlight range:range];

[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = attributedString;
} completion:nil];
}
}
self.backupAttributedText = self.attributedText;
for (UITouch *touch in touches) {
CGPoint touchPoint = [touch locationInView:self];
NSValue *rangeValue = [self attributedTextRangeForPoint:touchPoint];
if (rangeValue) {
NSRange range = [rangeValue rangeValue];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithAttributedString:self.attributedText];
[attributedString addAttributes:self.linkAttributeHighlight range:range];

[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = attributedString;
} completion:nil];
}
}
[super touchesBegan:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = self.backupAttributedText;
} completion:nil];
[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = self.backupAttributedText;
} completion:nil];
[super touchesCancelled:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = self.backupAttributedText;
} completion:nil];

for (UITouch *touch in touches) {
NSValue *rangeValue = [self attributedTextRangeForPoint:[touch locationInView:self]];
if (rangeValue) {
void(^handler)(FRHyperLabel *label, NSRange selectedRange) = self.handlerDictionary[rangeValue];
handler(self, [rangeValue rangeValue]);
}
}
[UIView transitionWithView:self duration:highLightAnimationTime options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
self.attributedText = self.backupAttributedText;
} completion:nil];

for (UITouch *touch in touches) {
NSValue *rangeValue = [self attributedTextRangeForPoint:[touch locationInView:self]];
if (rangeValue) {
void(^handler)(FRHyperLabel *label, NSRange selectedRange) = self.handlerDictionary[rangeValue];
handler(self, [rangeValue rangeValue]);
}
}
[super touchesEnded:touches withEvent:event];
}

#pragma mark - Substring Locator

- (NSValue *)attributedTextRangeForPoint:(CGPoint)point {
NSLayoutManager *layoutManager = [NSLayoutManager new];
NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:CGSizeZero];
textContainer.lineFragmentPadding = 0.0;
textContainer.lineBreakMode = self.lineBreakMode;
textContainer.maximumNumberOfLines = self.numberOfLines;
textContainer.size = self.bounds.size;
[layoutManager addTextContainer:textContainer];
//textStorage to calculate the position
NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:self.attributedText];
[textStorage addLayoutManager:layoutManager];
// find the tapped character location and compare it to the specified range
CGPoint locationOfTouchInLabel = point;
CGRect textBoundingBox = [layoutManager usedRectForTextContainer:textContainer];
CGPoint textContainerOffset = CGPointMake((CGRectGetWidth(self.bounds) - CGRectGetWidth(textBoundingBox)) * 0.5 - CGRectGetMinX(textBoundingBox),
(CGRectGetHeight(self.bounds) - CGRectGetHeight(textBoundingBox)) * 0.5 - CGRectGetMinY(textBoundingBox));
CGPoint locationOfTouchInTextContainer = CGPointMake(locationOfTouchInLabel.x - textContainerOffset.x, locationOfTouchInLabel.y - textContainerOffset.y);
NSInteger indexOfCharacter = [layoutManager characterIndexForPoint:locationOfTouchInTextContainer inTextContainer:textContainer fractionOfDistanceBetweenInsertionPoints:nil];
for (NSValue *rangeValue in self.handlerDictionary) {
NSRange range = [rangeValue rangeValue];
if (NSLocationInRange(indexOfCharacter, range)) {
return rangeValue;
}
}
return nil;
NSLayoutManager *layoutManager = [NSLayoutManager new];
NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:CGSizeZero];

textContainer.lineFragmentPadding = 0.0;
textContainer.lineBreakMode = self.lineBreakMode;
textContainer.maximumNumberOfLines = self.numberOfLines;
textContainer.size = self.bounds.size;
[layoutManager addTextContainer:textContainer];

//textStorage to calculate the position
NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:self.attributedText];
[textStorage addLayoutManager:layoutManager];

// find the tapped character location and compare it to the specified range
CGPoint locationOfTouchInLabel = point;
CGRect textBoundingBox = [layoutManager usedRectForTextContainer:textContainer];
CGPoint textContainerOffset = CGPointMake((CGRectGetWidth(self.bounds) - CGRectGetWidth(textBoundingBox)) * 0.5 - CGRectGetMinX(textBoundingBox),
(CGRectGetHeight(self.bounds) - CGRectGetHeight(textBoundingBox)) * 0.5 - CGRectGetMinY(textBoundingBox));
CGPoint locationOfTouchInTextContainer = CGPointMake(locationOfTouchInLabel.x - textContainerOffset.x, locationOfTouchInLabel.y - textContainerOffset.y);
NSInteger indexOfCharacter = [layoutManager characterIndexForPoint:locationOfTouchInTextContainer inTextContainer:textContainer fractionOfDistanceBetweenInsertionPoints:nil];

for (NSValue *rangeValue in self.handlerDictionary) {
NSRange range = [rangeValue rangeValue];
if (NSLocationInRange(indexOfCharacter, range)) {
return rangeValue;
}
}

return nil;
}


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