文本框缩进

 -(void)textViewDidChange:(UITextView *)textView{
    
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.lineSpacing = 5;  //行间距
    paragraphStyle.firstLineHeadIndent = 5*kRating;  /**首行缩进宽度*/
    paragraphStyle.alignment = NSTextAlignmentLeft;
    NSDictionary *attributes = @{
                                 NSFontAttributeName:[UIFont systemFontOfSize:14*kRating],
                                 NSParagraphStyleAttributeName:paragraphStyle
                                 };
    textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];
}
／／注意方法名