字體大小一樣

NSString *heightlightString = @"叫我第一名";
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:heightlightString];
[str addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(2, 3)];

label.attributedText = str;

字體大小不一樣

NSString *string = [NSString stringWithFormat:@"聯(lián)系電話：12345678899"];
NSMutableAttributedString *myString = [[NSMutableAttributedString alloc] initWithString:string];
[myString addAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:20], NSForegroundColorAttributeName:[UIColor redColor]} range:NSMakeRange(5, 11)]; 
    clockLabel.attributedText = stra;

label.attributedText = myString;

range需要location和length兩個(gè)參數(shù)，設(shè)置想要改動的字體顏色和范圍.