How to ADD HasTag in TextView
UITextView * myTextView = [[UITextView alloc] init];
[myTextView setAttributedText:[self attributedMessageFromMessage: myTextView.text]];
NSArray * hashTagsArray = [NSArray arrayWithObjects:@"Apple", @"Google", @"Microsoft",@"Yahoo", @"Microsoft Google", @"Google Apple", nil];
//Add Tap Gesture in TextView for gives action to HashTags
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:selfaction:@selector(messageTapped:)];
tap.numberOfTapsRequired = 1;
[myTextView addGestureRecognizer:tap];
//This method is used for showing color in HashTags according to its Array. Its only show on color on tags which is in array.
- (NSAttributedString *)attributedMessageFromMessage:(NSString *)message
{
NSArray* messageWords = [message componentsSeparatedByString: @" "];
NSMutableAttributedString *attributedMessage = [[NSMutableAttributedString alloc]initWithString:@""];
for (NSString *word in messageWords)
{
NSDictionary * attributes;
if (word.length>0) {
if([word characterAtIndex:0] == '@')
{
if ([hashTagsArray containsObject:[word substringFromIndex:1]])
{
attributes = @{NSForegroundColorAttributeName:[UIColor blueColor],
wordType: userNameKey,
userNameKey:[word substringFromIndex:1]};
}
else
{
attributes = @{NSForegroundColorAttributeName:[UIColor blackColor],wordType: normalKey};
}
}
else if([word characterAtIndex:0] == '*')
{
if ([hashTagsArray containsObject:[word substringFromIndex:1]])
{
attributes = @{NSForegroundColorAttributeName:[UIColor blueColor],
wordType: hashTagKey,
hashTagKey:[word substringFromIndex:1]};
}
else
{
attributes = @{NSForegroundColorAttributeName:[UIColor blackColor],wordType: normalKey};
}
}
else
{
attributes = @{NSForegroundColorAttributeName:[UIColor blackColor], wordType:normalKey};
}
NSAttributedString * subString = [[NSAttributedString alloc]
initWithString:[NSString stringWithFormat:@"%@ ",word]
attributes:attributes];
[attributedMessage appendAttributedString:subString];
}
}
return attributedMessage;
}
//This method is used to find which HashTag is tapped
- (IBAction)messageTapped:(UITapGestureRecognizer *)recognizer
{
UITextView *textView = (UITextView *)recognizer.view;
textView.selectable = YES;
NSLayoutManager *layoutManager = textView.layoutManager;
CGPoint location = [recognizer locationInView:textView];
location.x -= textView.textContainerInset.left;
location.y -= textView.textContainerInset.top;
NSUInteger characterIndex;
characterIndex = [layoutManager characterIndexForPoint:location
inTextContainer:textView.textContainer
fractionOfDistanceBetweenInsertionPoints:NULL];
textView.selectable = NO;
if (characterIndex < textView.textStorage.length)
{
NSRange range;
id type = [textView.attributedText attribute:wordType
atIndex:characterIndex
effectiveRange:&range];
if([type isEqualToString:userNameKey])
{
NSString *userName = [textView.attributedText attribute:userNameKey
atIndex:characterIndex
effectiveRange:&range];
[self hashTagBtnAction:userName];
}
else if([type isEqualToString:hashTagKey])
{
NSString *userName = [textView.attributedText attribute:hashTagKey
atIndex:characterIndex
effectiveRange:&range];
[self hashTagBtnAction:userName];
}
}
}
//This method is used for gives action on HashTags.
-(void)hashTagBtnAction:(NSString *)str
{
NSLog(@"You tap on %@ Tag", str);
//code here......
}
