NIAttributedLabel Example 2

NIAttributedLabelExample2.m

NSString* string =
@"For 20 years she has ventured into the dark horizon. "
@"At long last, a planet grows in the distance. "
@"\"Hello world!\" she exclaims.";

// We're going to customize the words "hello" and "world" in the string above to make them stand
// out in our text.
NSRange rangeOfHello = [string rangeOfString:@"Hello"];
NSRange rangeOfWorld = [string rangeOfString:@"world!"];

// We must create a mutable attributed string in order to set the CoreText properties.
NSMutableAttributedString* text = [[NSMutableAttributedString alloc] initWithString:string];

// See http://iosfonts.com/ for a list of all fonts supported out of the box on iOS.
UIFont* font = [UIFont fontWithName:@"Futura-MediumItalic" size:30];

// The following set of methods are all category methods added by the [attributedlabel] feature.
// Each method has a final argument for specifying a range. If you don't specify a range then the
// modification will be applied to the entire string.
[text setFont:font range:rangeOfHello];
[text setFont:font range:rangeOfWorld];
[text setUnderlineStyle:kCTUnderlineStyleSingle
               modifier:kCTUnderlinePatternSolid
                  range:rangeOfHello];
[text setTextColor:[UIColor redColor] range:rangeOfHello];

NIAttributedLabel* label = [[NIAttributedLabel alloc] initWithFrame:CGRectZero];

// We want this label to wrap over multiple lines. With CoreText we have to use either word or
// character wrapping in order to have a paragraph wrap over multiple lines. Truncation modes
// will only work for single lines of text and would require us to explicitly break the lines up
// with newline (\n) characters.
label.numberOfLines = 0;
label.lineBreakMode = UILineBreakModeWordWrap;

label.autoresizingMask = UIViewAutoresizingFlexibleDimensions;
label.frame = CGRectInset(self.view.bounds, 20, 20);

// When we assign the attributed text to the label it copies the attributed text object into the
// label. If we want to make any further stylistic changes then we must either use the label's
// methods or assign a modified attributed string object again.
label.attributedString = text;

[self.view addSubview:label];