使用NSAttributedString在Objective-C中进行字符串munging

NSString *originalString = @"This is a test string.";
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:originalString];

// Set the first word to bold
[attributedString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:14] range:NSMakeRange(0, 4)];

// Set the last word to red
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(19, 4)];

// Replace the word "test" with "munging"
[attributedString replaceCharactersInRange:NSMakeRange(10, 4) withString:@"munging"];

// Set the new string to a label
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 50)];
label.attributedText = attributedString;
[self.view addSubview:label];