iOS颜色不同的文本

NSString *beginTimeString = [NSString stringWithFormat:@"开始时间：%@",eventListModel.beginTime>1?[NSDate dateWithTimeForString:eventListModel.beginTime]:@"无"];
NSMutableAttributedString *beginTimeAttribute = [[NSMutableAttributedString alloc] initWithString:beginTimeString];
NSRange timeRange2 = [beginTimeString rangeOfString:@"开始时间："];
[beginTimeAttribute addAttributes:@{NSForegroundColorAttributeName:[UIColor lightGrayColor]} range:timeRange2];


self.time.attributedText =  beginTimeAttribute;