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];

}