textview 弹出键盘上面添加完成按钮，并设置输入内容的格式。

- (void)setContentView{

       self.contentTextView = [[UITextView alloc]initWithFrame:CGRectMake(11, 70, ScreenWidth-22, ScreenHeight-70)];

    self.contentTextView.backgroundColor = [UIColor whiteColor];

    self.contentTextView.delegate = self;

    self.contentTextView.font = FONT_LB(15.0);

    //    self.contentTextView.text = self.item.content;

     [self.view addSubview:self.contentTextView];

     NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    paragraphStyle.lineSpacing = 6;// 字体的行间距

    paragraphStyle.alignment = NSTextAlignmentJustified;// 左右对齐

    paragraphStyle.firstLineHeadIndent = 15.0f;//首行缩进

    paragraphStyle.paragraphSpacingBefore = 1.0f;//段首行空白空间/

    paragraphStyle.alignment = NSTextAlignmentJustified;//（两端对齐的）文本对齐方式：（左，中，右，两端对齐，自然）

    paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")

    paragraphStyle.headIndent = 20;//整体缩进(首行除外)

    paragraphStyle.tailIndent = 20;//

    paragraphStyle.minimumLineHeight = 10;//最低行高

    paragraphStyle.maximumLineHeight = 20;//最大行高

    paragraphStyle.paragraphSpacing = 15;//段与段之间的间距

    paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向（一共➡️三种）

    paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */

    paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS，唯一支持的值分别为0和1

    NSDictionary *attributes = @{

                                 

                                 NSFontAttributeName:[UIFont systemFontOfSize:15],

                                 

                                 NSForegroundColorAttributeName:LableTextColor333,

                                 

                                 NSParagraphStyleAttributeName:paragraphStyle

                                 

                                 };

    

    self.contentTextView.attributedText = [[NSAttributedString alloc] initWithString:self.item.content attributes:attributes];

     //定义一个toolBar

     UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, 35)];

    topView.backgroundColor = [UIColor whiteColor];

    //设置style

    [topView setBarStyle:UIBarStyleDefault];

     //定义两个flexibleSpace的button，放在toolBar上，这样完成按钮就会在最右边

    UIBarButtonItem * button1 =[[UIBarButtonItem  alloc]initWithBarButtonSystemItem:                                        UIBarButtonSystemItemFlexibleSpace target:self action:nil];

    UIBarButtonItem * button2 = [[UIBarButtonItem  alloc]initWithBarButtonSystemItem:                                        UIBarButtonSystemItemFlexibleSpace target:self action:nil];

    //定义完成按钮    

    UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStyleDone  target:self action:@selector(resignKeyboard)];

    //在toolBar上加上这些按钮

    NSArray * buttonsArray = [NSArray arrayWithObjects:button1,button2,doneButton,nil];

    [topView setItems:buttonsArray];

    [self.contentTextView setInputAccessoryView:topView];

}