TTTAttributedLabel 介绍
TTTAttributedLabel 是 UILable 的改进，支持 NSAttributedStrings
示例代码：
TTTAttributedLabel *label = [[[TTTAttributedLabel alloc] initWithFrame:CGRectZero] autorelease];
label.font = [UIFont systemFontOfSize:14];
label.textColor = [UIColor darkGrayColor];
label.lineBreakMode = UILineBreakModeWordWrap;
label.numberOfLines = 0;
NSString *text = @"Lorem ipsum dolar sit amet";
[label setText:text afterInheritingLabelAttributesAndConfiguringWithBlock:^ NSAttributedString *(NSMutableAttributedString *mutableAttributedString) {
NSRange boldRange = [[mutableAttributedString string] rangeOfString:@"ipsum dolar" options:NSCaseInsensitiveSearch];
NSRange strikeRange = [[mutableAttributedString string] rangeOfString:@"sit amet" options:NSCaseInsensitiveSearch];
// Core Text APIs use C functions without a direct bridge to UIFont. See Apple's "Core Text Programming Guide" to learn how to configure string attributes.
UIFont *boldSystemFont = [UIFont boldSystemFontOfSize:14];
CTFontRef font = CTFontCreateWithName((CFStringRef)boldSystemFont.fontName, boldSystemFont.pointSize, NULL);
if (font) {
[mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName value:(id)font range:boldRange];
[mutableAttributedString addAttribute:@"TTTCustomStrikeOut" value:[NSNumber numberWithBool:YES] range:strikeRange];
CFRelease(font);
}
return mutableAttributedString;
}];