placeholder
我的textField建在cell上, 暂时发现只能在取出cell的协议方法写以下代码, 不能在cell初始化里写

NSString *holderText = _mArrOfPlaceholder[indexPath.row];

NSMutableAttributedString *attriOfPlaceholder = [[NSMutableAttributedString alloc] initWithString:holderText];

//placeholder字体颜色
[attriOfPlaceholder addAttribute:NSForegroundColorAttributeName
                   value:[UIColor grayColor]
                   range:NSMakeRange(0, holderText.length)];

 //placeholder字体大小
[attriOfPlaceholder addAttribute:NSFontAttributeName
                   value:[UIFont systemFontOfSize:13]
                   range:NSMakeRange(0, holderText.length)];

cell.textFieldOfInfo.attributedPlaceholder = attriOfPlaceholder;

加粗

[UIFont boldSystemFontOfSize:15];