If I want to create some strings having format as these:
the string is the text property of a label.
some characters in this string have color different from other characters.
some characters are underlined and have a link, and when I hit the characters, and other views pop up.
Could somebody tell me how can I realize this effect?
If you support iOS < 6, better use 3rd party component e.g. TTTAttributedLabel. Else use attributedText property of UILabel.
NSDictionary *colors = [[NSDictionary alloc] initWithObjectsAndKeys: [UIColor blueColor], #"Hyd", [UIColor brownColor], #"Bang", [UIColor orangeColor], #"Delhi", [UIColor yellowColor], #"Gujarat", nil];
NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:#""];
for (NSString *word in colors) {
UIColor *color = [colors objectForKey:word];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:color forKey:NSForegroundColorAttributeName];
NSAttributedString *substring = [[NSAttributedString alloc] initWithString:word attributes:attributes];
[attributeString appendAttributedString:substring];
}
Related
I have a UILabel which is displayed as a question. Its successfully displaying the question text which has been assigned to it programmatically. But later according to one if else condition, I have to change text in the label.Specifically I want to display an asterik(*) mark at the end of the string if that is a mandatory question.The * should be in red color and rest of the text should be in black.But it displays only the question not the * mark.If I try to print the questLabel.text it is giving the question with * mark at the end.Here is the code that I am trying
questText = questLabel.text;
questText = [questText stringByAppendingString:#"✶"];
NSMutableAttributedString * str = [[NSMutableAttributedString alloc] initWithString:questText];
NSMutableAttributedString *text =
[[NSMutableAttributedString alloc]
initWithAttributedString: str];
int length = (int)text.length;
[text addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(length-1, 1)];
[questLabel setAttributedText: text];
If I try to print the value of questLabel.attributedText :
Question{
}✶{
NSColor = "UIDeviceRGBColorSpace 1 0 0 1";
}
And the value for questLabel.text is :Question✶
Please help me out with this..Thanks in advance..
You should change your code to this.
NSString *questText = questLabel.text;
questText = [questText stringByAppendingString:#"✶"];
NSMutableAttributedString *text =
[[NSMutableAttributedString alloc] initWithString:questText];
int length = (int)text.length;
[text addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:NSMakeRange(0, length-1)];
[text addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(length-1, 1)];
[questLabel setAttributedText: text];
You can also try this
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:self.questLabel.text attributes:#{NSForegroundColorAttributeName:[UIColor blackColor]}];
NSMutableAttributedString *starString = [[NSMutableAttributedString alloc] initWithString:#"✶" attributes:#{NSForegroundColorAttributeName:[UIColor redColor]}];
[string appendAttributedString:starString];
[self.questLabel setAttributedText:string];
i have a program in which i get a tweets from twitter and show them in UITableviewcell. now problem is that i have to make a all twitter names bold and bule and show them in the orginal tweet with bule and bold names.
For Example i have tweet like this
MT #OraTV: SNEAK PEEK: #tomgreenlive #TheoVon & #DavidBegnaud talk Miley's #twerking #Batfleck &more on
so all the names starting with # should be bold and bule.
i use this code to extract All names starting with # but not know how to bold them and show
them in single uitableviewcell
NSString * aString =twitterMessage
NSMutableArray *substrings = [NSMutableArray new];
NSScanner *scanner = [NSScanner scannerWithString:aString];
[scanner scanUpToString:#"#" intoString:nil];
while(![scanner isAtEnd]) {
NSString *substring = nil;
[scanner scanString:#"#" intoString:nil];
if([scanner scanUpToString:#" " intoString:&substring]) {
[substrings addObject:substring];
}
[scanner scanUpToString:#"#" intoString:nil];
}
you have to build an NSAttributedString by swiping between 2 fonts and colors.
If you're able to detect them, you should probably replace your names by surrounding them with a known markup (eg: #aName). Then, parse the string to build a NSAttributedString.
You can use this code (not tested, you'll probably have to tweak):
// String to parse
NSString *markup = #"MT <color>#OraTV</color>: SNEAK PEEK: <color>#tomgreenlive</color>...";
// Names font and color
UIFont *boldFont = [UIFont boldSystemFontOfSize:15.0f];
UIColor *boldColor = [UIColor blueColor];
// Other text font and color
UIFont *stdFont = [UIFont systemFontOfSize:15.0f];
UIColor *stdColor = [UIColor blackColor];
// Current font and color
UIFont *currentFont = stdFont;
UIColor *currentColor = stdColor;
// Parse HTML string
NSMutableAttributedString *aString = [[NSMutableAttributedString alloc] initWithString:#""];
NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:#"(.*?)(<[^>]+>|\\Z)"
options:NSRegularExpressionCaseInsensitive|NSRegularExpressionDotMatchesLineSeparators
error:nil];
NSArray *chunks = [regex matchesInString:markup options:0 range:NSMakeRange(0, [markup length])];
for (NSTextCheckingResult* b in chunks)
{
NSArray *parts = [[markup substringWithRange:b.range] componentsSeparatedByString:#"<"];
NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:currentFont,NSFontAttributeName,currentColor,NSForegroundColorAttributeName,nil];
[aString appendAttributedString:[[NSAttributedString alloc] initWithString:[parts objectAtIndex:0] attributes:attrs]];
if([parts count] > 1)
{
NSString *tag = (NSString *)[parts objectAtIndex:1];
if([tag hasPrefix:#"color"])
{
currentFont = boldFont;
currentColor = boldColor;
}
else if([tag hasPrefix:#"/color"])
{
currentFont = stdFont;
currentColor = stdColor;
}
}
}
Hope that helps.
Cyril
So you have all the names properly extracted already? If so, it seems like NSAttributedString is what you want. More information here.
Something like this: [str setTextColor:[UIColor blueColor] range:NSMakeRange(0,5)];
For bold text, use [UIFont boldSystemFontOfSize:fontSize]. See example in the second link above.
As an example, say I had an array of 10 NSAttributedStrings, what is the best method for combining them all into one string? I know of the appendAttributedString method, but this only allows for one to be combined at a time, meaning a loop is needed.
Or is there any need to combine them if theyre just going into a textview - just have a loop to add them to that view? Im just trying to get my head around how a lot of text in different formats is added to a textview!
Please, try:
NSRange range = NSMakeRange(0, 1);
NSString *space = #" ";
NSMutableAttributedString *attSpace = [[NSMutableAttributedString alloc] initWithString:space];
[attSpace addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:range];
[attSpace addAttribute:NSFontAttributeName value:[UIFont fontWithName:#"HelveticaNeue-Light"
size:11.f] range:range];
range = NSMakeRange(0, [string1 length]);
NSMutableAttributedString *att1 = [[NSMutableAttributedString alloc] initWithString:string1];
[att1 addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:range];
[att1 addAttribute:NSFontAttributeName value:[UIFont fontWithName:#"HelveticaNeue-Light"
size:11.f] range:range];
range = NSMakeRange(0, [string2 length]);
NSMutableAttributedString *att2 = [[NSMutableAttributedString alloc] initWithString:string2];
[att2 addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:range];
[att2 addAttribute:NSFontAttributeName value:[UIFont fontWithName:#"HelveticaNeue-Light"
size:11.f] range:range];
[att1 appendAttributedString:attSpace];
[att1 appendAttributedString:att2];
I'll share a kind of complex combination I've made mixing plain, striked and bold text in a resultant attributed string over the title of UIButton.
// Monthly button
NSMutableAttributedString *strikedOutPrice = [[NSMutableAttributedString alloc] initWithString:#"6,99"];
[strikedOutPrice setAttributes:#{ NSForegroundColorAttributeName : [UIColor whiteColor], NSStrikethroughStyleAttributeName: #2 } range:NSMakeRange(0, [strikedOutPrice length])];
NSMutableAttributedString *boldPrice = [[NSMutableAttributedString alloc] initWithString:#"4,99"];
[boldPrice setAttributes:#{ NSFontAttributeName:[UIFont boldSystemFontOfSize:16.0f], NSForegroundColorAttributeName : [UIColor whiteColor] } range:NSMakeRange(0, [boldPrice length])];
NSMutableAttributedString* titleStringMonthly = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:#"%# %# %#" , [[LocalizationSystem sharedLocalSystem] localizedStringForKey:#"1 Month for" value:#"1 Mes por"], #"6,99", #"4,99"]];
[titleStringMonthly setAttributes:#{ NSForegroundColorAttributeName : [UIColor whiteColor] } range:NSMakeRange(0, [titleStringMonthly length])];
NSString *language = [Utils getAppLanguage];
if([language isEqualToString:#"es"])
{
[titleStringMonthly replaceCharactersInRange:NSMakeRange(10, 4) withAttributedString:strikedOutPrice];
[titleStringMonthly replaceCharactersInRange:NSMakeRange(15, 4) withAttributedString:boldPrice];
}
else
{
[titleStringMonthly replaceCharactersInRange:NSMakeRange(12, 4) withAttributedString:strikedOutPrice];
[titleStringMonthly replaceCharactersInRange:NSMakeRange(17, 4) withAttributedString:boldPrice];
}
[_oneMonthButton setAttributedTitle:titleStringMonthly forState:UIControlStateNormal];
I imagine that for this case you could have a couple of dynamic counters that keeps track of the index and length of the next range and make the replacements over a NSMutableAttributedString (like I do with my titleStringMonthly on the example)
Hope It helps someone.
You could do something like this
NSString *attr = [NSString stringWithFormat:#"%#%#%#", attributedString1, string2, string3];
Doing so will result in one attr string variable with all 10 of the strings put together, and you could do [textView setText:attr]; :)
this is what I am trying to do. I have a UILabel, but one word in that UILabel should be in a red color. After some research I found the TTTAttributedLabel
But I can't get my head arround it. Because my label is multilanguage so it's quite difficult because they are all working with NSRange.
Here is my label.
In dutch:
Het 25m bad is vandaag **bezet** van 12:00 tot 15:00
In English
The 25m pool is today **occupied** from 12:00 till 15:00
I need the text in bold in the red color.
Can anybody help me?
Kind regards
For example, you could use this snippet to get the NSRange where "occupied" or "bezet" is:
NSRange occupiedRange = [str rangeOfString:NSLocalizedString(#"occupied", #"")];
if (occupiedRange.location == NSNotFound) {
NSLog(#"Not found");
} else {
...
}
Hope the below code snippet may work for you
-(NSAttributedString*)configureToAttributedwithString:(NSString*)str
{
NSRange occupiedRange = [str rangeOfString:NSLocalizedString(#"occupied", #"")];
if (occupiedRange.location == NSNotFound)
{
NSLog(#"Not found");
NSAttributedString *attRStr = [[[NSAttributedString alloc] initWithString:str] autorelease];
return (attRStr);
}
else
{
NSString *string = [str substringToIndex:occupiedRange.location];
str = [str substringFromIndex:occupiedRange.location];
NSString *tarGetString = [str substringToIndex:occupiedRange.length];
str = [str substringFromIndex:occupiedRange.length];
CGColorRef colorRed = [[UIColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0] CGColor];
NSNumber *underline = [NSNumber numberWithInt:kCTUnderlineStyleSingle];
CTFontRef sysUITargetFont = CTFontCreateUIFontForLanguage(kCTFontUIFontEmphasizedSystem,20.0, NULL);
NSDictionary *attributesDictTarget = [NSDictionary dictionaryWithObjectsAndKeys:
(id)underline, (id)kCTUnderlineStyleAttributeName,
colorRed, (id)kCTForegroundColorAttributeName,
colorRed, (id)kCTStrokeColorAttributeName,nil];
CGColorRef colorBlack = [[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:1.0] CGColor];
CTFontRef sysUIDefaultFont = CTFontCreateUIFontForLanguage(kCTFontUIFontMessage,20.0, NULL);
NSDictionary *attributesDictDefault = [NSDictionary dictionaryWithObjectsAndKeys:
colorBlack, (id)kCTStrokeColorAttributeName,nil];
NSMutableAttributedString *attMString = [[NSMutableAttributedString alloc] initWithString:string attributes:attributesDictDefault];
NSAttributedString *stringToDraw = [[NSAttributedString alloc] initWithString:tarGetString
attributes:attributesDictTarget];
[attMString appendAttributedString:stringToDraw];
NSAttributedString *stringRest = [[NSAttributedString alloc] initWithString:str
attributes:attributesDictDefault];
[attMString appendAttributedString:stringRest];
NSLog(#"check %#", [attMString string]);
return (attMString);
}
}
I know that in a CFAttributedString does not respond to any method like the stringByReplacingOccurrencesOfString:withString: method of NSString, and I cannot find a method that can do that using a CF(Mutable)AttributedString.
I want to replace some text in the string with the same text but another color, e. g., I have the string #"This is a text" and I want to change the color of the word "text".
I hope the question is clear enough, if it isn't, ask me.
Thanks.
I would add a category on NSMutableAttributedString:
#implementation NSMutableAttributedString (MySearchAndReplaceCategory)
- (void)setAttributes:(NSDictionary *)attributes forOccurencesOfString:(NSString *)target
{
NSRange searchRange = NSMakeRange(0, self.length);
while ( searchRange.length )
{
NSRange range = [self.string rangeOfString:target options:0 range:searchRange];
if ( ! range.length )
break;
[self setAttributes:attributes range:range];
searchRange.length = NSMaxRange(searchRange) - NSMaxRange(range);
searchRange.location = NSMaxRange(range);
}
}
#end
Then use something like that:
UIColor *color = [UIColor greenColor];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:(__bridge id) color.CGColor
forKey:(__bridge id) kCTForegroundColorAttributeName];
NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:#"This is a text"];
[text setAttributes:attributes forOccurencesOfString:#"text"];
re: Toll-Free Bridging
CFAtttributeString and NSAttributeString have different attributes keys.
Ex. Color Mac OS X:
NSForegroundColorAttributeName - NSColor - Default blackColor
kCTForegroundColorAttributeName - The value associated with this attribute must be a CGColor object. Default value is black.