I have been working on this for a few days with help from this great community.
I have a NSArray that I need to edit NSStrings within. I have managed to detect a marker in the string and make it bold. However now I am trying to display the strings in the order that they are within the NSArray whilst maintaining the Bold that was added to the specific strings.
I can display the individual Bold String 'string' but I need it to be in order that it is within the array. I know of stringByAppendingString but this would put it at the end.
Any directions would be brilliant.
for (NSString *testWord in legislationArray) {
if ([testWord rangeOfString:#"BOLDME"].location != NSNotFound) {
//Remove Marker
NSString *stripped = [testWord stringByReplacingOccurrencesOfString:#"BOLDME" withString:#""];
//Get string and add bold
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:stripped];
NSRange selectedRange = [stripped rangeOfString:(stripped)];
[string beginEditing];
[string addAttribute:NSFontAttributeName
value:[UIFont fontWithName:#"Helvetica-Bold" size:18.0]
range:selectedRange];
[string endEditing];
//Where to go now with string?
}
}
cell.dynamicLabel.text = [legislationArray componentsJoinedByString:#"\n"];
EDIT
Based on the answers below I got it working however the bold method invokes this error:
componentsJoinedByString return a NSString, when you want a NSAttributedString.
Plus, you're setting your text to a receiver that awaits a NSString (cell.dynamicLabel.text), where what you want should be cell.dynamicLabel.attributedText.
Since there is no equivalent to componentsJoinedByString for a NSAttributedString return, you have to do it the oldway, with a for loop, starting with initializing a NSMutableAttributedString, and adding to it each components (that you may "transform") to it.
Here is a example and related question.
Just use additional array. Change your code to
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] init];
for (NSString *testWord in legislationArray) {
if ([testWord rangeOfString:#"BOLDME"].location != NSNotFound) {
//Remove Marker
NSString *stripped = [testWord stringByReplacingOccurrencesOfString:#"BOLDME" withString:#""];
//Get string and add bold
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:stripped];
NSRange selectedRange = [stripped rangeOfString:(stripped)];
[string beginEditing];
[string addAttribute:NSFontAttributeName
value:[UIFont fontWithName:#"Helvetica-Bold" size:18.0]
range:selectedRange];
[string endEditing];
//Where to go now with string?
[attrString appendAttributedString:string];
}
else
{
[attrString appendAttributedString:[[NSAttributedString alloc] initWithString:testWord]];
}
// NEW LINE
[attrString appendAttributedString:[[NSAttributedString alloc] initWithString:#"\n"]];
}
cell.dynamicLabel.attributedText = attrString;
UPDATE:
Your additional issue is not a error - this is a way how XCode shows attributed strings in debug window:
Related
Ive been messing around with this without proper results. My code is as follows
NSMutableAttributedString *nameString = [[NSMutableAttributedString alloc]initWithString:((User *)appDelegate.users[self.currentUserIndex]).name];
[nameString addAttribute:NSFontAttributeName value:[UIFont fontWithName:#"Helvetica-Bold" size:12.0] range:NSMakeRange(0, nameString.length)];
NSString *adviceString = [[NSString alloc] initWithFormat:#"%#, remember be extra aware of the \n cat today. The dog index is 4, dogcatcher \n suggests you should at minimum wear \n a dog and apply cat...", [nameString string]];
So, it doesn't bold the username as desired. I tried using NSAttributedString for adviceString but then I can't use the initWithFormat: method and list the variables after the string, and I don't see any NSAttributedString equivalent. I wanted to you NSAttributedString instead of NSMutableAttributedString, but it doesn't seem to recognise the addAttribute:value:fontWithName:range method. Can anybody help me out? Any help much appreciated.
That's for sure, you need to use NSAttributedString also for adviceString to get attributed.
The code goes like this, if you need to use stringWithFormat:
NSString *fullName = #"Anoop Kumar Vaidya";
NSMutableAttributedString *attributedName = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:#"Hello %#", fullName]
attributes:#{NSFontAttributeName : [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]}];
In the attributes you can add few more desired/required attributes.
EDIT 2:
You may like to use some methods as :
-(NSMutableAttributedString *)normalString:(NSString *)string{
return [[NSMutableAttributedString alloc] initWithString:string
attributes:#{}];
}
-(NSMutableAttributedString *)boldString:(NSString *)string{
return [[NSMutableAttributedString alloc] initWithString:string
attributes:#{NSFontAttributeName : [UIFont boldSystemFontOfSize:[UIFont systemFontSize]]
}];
}
And then use them as per your requirement:
NSMutableAttributedString *attributedName = [self boldString:fullName];
[attributedName appendAttributedString:[self normalString:#" is creating one"]];
[attributedName appendAttributedString:[self boldString:#" bold"]];
[attributedName appendAttributedString:[self normalString:#" string."]];
I'm off to a good start. But I would like to make this code more dynamic.
NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:string];
UIFont *font = [UIFont systemFontOfSize:10.0f];
UIFont *smallFont = [UIFont systemFontOfSize:9.0f];
[attString beginEditing];
[attString addAttribute:NSFontAttributeName value:(font) range:NSMakeRange(0, string.length - 2)];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:NSMakeRange(string.length - 1, 1)];
Say I have the following String:
#"C3OC2OH4"
I would like to adjust the font size of the numbers only to fulfill a chemistry application. How can I scan the above string, and create a series of custom ranges to plug into my function above, which adjusts the font size?
You can enumerate the characters and apply the attributes like this.
NSString * string = #"C3OC2OH4";
NSMutableAttributedString * attributedString = [NSMutableAttributedString new];
NSDictionary * subscriptAttributes = #{NSFontAttributeName : [UIFont systemFontOfSize:10.0],
NSBaselineOffsetAttributeName : #(-5.0)};
[string enumerateSubstringsInRange:NSMakeRange(0, [string length])
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
NSCharacterSet * letterCharacterSet = [NSCharacterSet letterCharacterSet];
if ([substring rangeOfCharacterFromSet:letterCharacterSet].location != NSNotFound)
[attributedString appendAttributedString:[[NSAttributedString alloc] initWithString:substring]];
else
[attributedString appendAttributedString:[[NSAttributedString alloc] initWithString:substring attributes:subscriptAttributes]];
}];
In this case substring is each character and is appended without any change if it is a letter. If it is a number we change the font size and shift the baseline. Change them according to your need.
Good luck.
I have the following code :
NSMutableAttributedString *attrS = [[NSMutableAttributedString alloc] initWithString:#"• Get Tested Son"];
NSMutableAttributedString *boldS = [[NSMutableAttributedString alloc] initWithString:#"Son"];
[boldS addAttribute:NSFontAttributeName value:SOMEBOLDFONT range:NSMakeRange(0, boldS.length)];
[attrS replaceCharactersInRange:[attrS.string rangeOfString:boldS.string]
withAttributedString:boldS];
As you can see, I want to bold the Son part. This does not work if I do the above statements but only works if I do :
[[attrS mutableCopy] replaceCharactersInRange:[attrS.string rangeOfString:boldS.string]
withAttributedString:boldS];
What might be the reason for that?
addAttribute works regardless of whether you take a mutableCopy. Your question is based on a false assumption. It therefore has no answer.
Run this:
NSMutableAttributedString *attrS = [[NSMutableAttributedString alloc] initWithString:#"• Get Tested Son"];
NSMutableAttributedString *boldS = [[NSMutableAttributedString alloc] initWithString:#"Son"];
UIFont *someBoldFont = [UIFont fontWithName:#"Arial" size:23.0f];
[boldS addAttribute:NSFontAttributeName value:someBoldFont range:NSMakeRange(0, boldS.length)];
NSMutableAttributedString *attrSCopy = [attrS mutableCopy];
[attrS replaceCharactersInRange:[attrS.string rangeOfString:boldS.string]
withAttributedString:boldS];
[attrSCopy replaceCharactersInRange:[attrS.string rangeOfString:boldS.string]
withAttributedString:boldS];
NSLog(#"%#", [attrS isEqual:attrSCopy] ? #"equal" : #"different");
It will output equal. Comment out the replaceCharactersInRange: for either attrS or attrSCopy and it will output different.
I have to show a text paragraph that contains few words in bold font. ex.
If I use different labels then on changing the orientation it does not resize properly.
Can anyone tell me what can the best way to do it.
You can use an UITextView using NSAttributedString (have a look to the apple doc)
And you have an explanation of how to use it here.
You can find the range of your word and change the font or the color or whatever using :
- (IBAction)colorWord:(id)sender {
NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:self.text.text];
NSArray *words = [self.text.text componentsSeparatedByString:#" "];
for (NSString *word in words)
{
if ([word hasPrefix:#"#"])
{
NSRange range=[self.text.text rangeOfString:word];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:range];
}
}
[self.text setAttributedText:string];
}
You have to use a NSAttributedString and assign it to the UITextField, this is an example:
UIFont *boldFont = [UIFont boldSystemFontOfSize:fontSize];
UIFont *regularFont = [UIFont systemFontOfSize:fontSize];
NSMutableAttributedString *myAttributedString = [[NSMutableAttributedString alloc] initWithString:yourString];
[myAttributedString addAttribute:NSFontAttributeName
value:boldFont
range:NSMakeRange(0, 2)];
[myAttributedString addAttribute:NSFontAttributeName
value:regularFont
range:NSMakeRange(3, 5)];
[self.description setAttributedText:myAttributedString];
Find all the doc here:
NSAttributedString
For your case, you can use a webView and load it with your string:
[webView loadHTMLString:[NSString stringWithFormat:#"<html><body style=\"background-color: transparent;\">This is <b><i>Test</b></i> dummy text ..</body></html>"] baseURL:nil];
This question may be a duplicate of this one. But the answers don't work for me and I want to be more specific.
I have a NSString, but I need a NS(Mutable)AttributedString and some of the words in this string should be given a different color. I tried this:
NSString *text = #"This is the text and i want to replace something";
NSDictionary *attributes = # {NSForegroundColorAttributeName : [UIColor redColor]};
NSMutableAttributedString *subString = [[NSMutableAttributedString alloc] initWithString:#"AND" attributes:attributes];
NSMutableAttributedString *newText = [[NSMutableAttributedString alloc] initWithString:text];
newText = [[newText mutableString] stringByReplacingOccurrencesOfString:#"and" withString:[subString mutableString]];
The "and" should be uppercase an red.
The documentation says that mutableString keeps the attribute mappings. But with my replacing-thing, I have no more attributedString on the right side of the assignment (in the last line of my code-snippet).
How can I get what I want? ;)
#Hyperlord's answer will work, but only if there is one occurence of the word "and" in the input string. Anyway, what I would do is use NSString's stringByReplacingOccurrencesOfString: initially to change every "and" to an "AND", then use a little regex to detect matches in attributed string, and apply NSForegroundColorAttributeName at that range. Here's an example:
NSString *initial = #"This is the text and i want to replace something and stuff and stuff";
NSString *text = [initial stringByReplacingOccurrencesOfString:#"and" withString:#"AND"];
NSMutableAttributedString *mutableAttributedString = [[NSMutableAttributedString alloc] initWithString:text];
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"(AND)" options:kNilOptions error:nil];
NSRange range = NSMakeRange(0,text.length);
[regex enumerateMatchesInString:text options:kNilOptions range:range usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
NSRange subStringRange = [result rangeAtIndex:1];
[mutableAttributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:subStringRange];
}];
And finally, just apply the attributed string to your label.
[myLabel setAttributedText:mutableAttributedString];
I think you should create a NSMutableAttributedString using the existing NSString and then add the style attributes with the appropriate NSRange in order to colorize the parts you want to emphasize for example:
NSString *text = #"This is the text and i want to replace something";
NSMutableAttributedString *mutable = [[NSMutableAttributedString alloc] initWithString:text];
[mutable addAttribute: NSForegroundColorAttributeName value:[UIColor redColor] range:[text rangeOfString:#"and"]];
Be aware: this is just from my head and not tested at all ;-)
Please try this code in Swift 2
var someStr = "This is the text and i want to replace something"
someStr.replaceRange(someStr.rangeOfString("and")!, with: "AND")
let attributeStr = NSMutableAttributedString(string: someStr)
attributeStr.setAttributes([NSForegroundColorAttributeName: UIColor.yellowColor()], range: NSMakeRange(17, 3) )
testLbl.attributedText = attributeStr
Here's another implementation (in Swift) that's helpful if you're doing some more complex manipulations (such as adding/deleting characters) with your attributed string:
let text = "This is the text and i want to replace something"
let mutAttrStr = NSMutableAttributedString(string: text)
let pattern = "\\band\\b"
let regex = NSRegularExpression(pattern: pattern, options: .allZeros, error: nil)
while let result = regex!.firstMatchInString(mutAttrStr.string, options: .allZeros, range:NSMakeRange(0, count(mutAttrStr.string)) {
let substring = NSMutableAttributedString(attributedString: mutAttrStr.attributedSubstringFromRange(result.range))
// manipulate substring attributes here
substring.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range NSMakeRange(0, count(substring.string))
mutAttrStr.replaceCharactersInRange(result.range, withAttributedString: substring)
}
Your final attributed string should be:
let finalAttrStr = mutAttrStr.copy() as! NSAttributedString