改变label中的某字体颜色

NSString *allString=@"你家在哪里,需要我送你么";

NSString *subString=@"在哪里";

UILabel *stringLabel=[[UILabel alloc]init];

stringLabel.frame=CGRectMake(0, 100, 300, 30);

stringLabel.font=[UIFont systemFontOfSize:17];

stringLabel.backgroundColor=[UIColor blackColor];

stringLabel.text=allString;

stringLabel.textColor=[UIColor whiteColor];

[self.view addSubview:stringLabel];

NSString *allS=[allString lowercaseString];

NSString *subS=[subString lowercaseString];

NSRange range=[allS rangeOfString:subS];

if (range.location!=NSNotFound) {

NSMutableAttributedString  *string=[[NSMutableAttributedString alloc]initWithString:allString];

[string addAttribute:NSForegroundColorAttributeName value:[UIColor yellowColor] range:range];

stringLabel.attributedText=string;

}