Object-c 问题，tableViewController问题

Question

navigationController+tableview时，tableView的textlabel不能自动延长,而且tableview进入编辑状态后，不显示“+”号圆圈或减号圆圈

代码如下：
这个是UITableViewController的代码：
#import "CZShowNumberTableViewController.h"
#import "CZContact.h"
#import "CZContactCell.h"
//#import "CZAddPeopleViewController.h"
//#import "CZFoundPeopleViewController.h"
#define CZContactPath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingString:@"contact.data"]
@interface CZShowNumberTableViewController ()//
@property(nonatomic,strong)NSMutableArray *contacts;

• (IBAction)cencelClick:(UIBarButtonItem *)sender; @end

@implementation CZShowNumberTableViewController

//懒加载
-(NSMutableArray *)contacts{
if (_contacts==nil) {
_contacts=[NSKeyedUnarchiver unarchiveObjectWithFile:CZContactPath] ;
if (_contacts==nil) {
_contacts=[NSMutableArray array];
}
}
return _contacts;
}
//编辑按钮

• (void)editClick:(UIBarButtonItem *)editItem{ [self.tableView setEditing:!self.tableView.editing animated:YES]; //[self.tableView]; // [self.tableView layoutIfNeeded]; editItem.title=self.tableView.isEditing?@"完成":@"编辑"; } //注销按钮

• (IBAction)cencelClick:(UIBarButtonItem *)sender {
  UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"亲，确定要注销吗？" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
  [self presentViewController:alert animated:YES completion:^{

  }];
  UIAlertAction *sure=[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
  [self.navigationController popViewControllerAnimated:YES];
  }];
  UIAlertAction *cencle=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

  }];
  [alert addAction:sure];
  [alert addAction:cencle];
  }

• (void)viewDidLoad {
  [super viewDidLoad];
  self.tableView.separatorStyle=UITableViewCellSeparatorStyleNone;
  UIBarButtonItem *rightItem=self.navigationItem.rightBarButtonItem;
  UIBarButtonItem *editItem=[[UIBarButtonItem alloc]initWithTitle:@"编辑" style:UIBarButtonItemStyleDone target:self action:@selector(editClick:)];
  self.navigationItem.rightBarButtonItems=@[rightItem,editItem];
  }

#pragma mark - TableView DataSource

• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
  return 1;//self.contacts.count;
  }

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"contacts"];
  // CZContactCell *cell=[CZContactCell contactCell:tableView];
  // cell.contact=self.contacts[indexPath.row];
  cell.textLabel.text=@"234567890-=";
  cell.detailTextLabel.text=@"34567890-=";
  return cell;
  }

#pragma mark - TableView Delegate
//设置编辑模式
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
if (self.tableView.isEditing) {
return UITableViewCellEditingStyleInsert;
}else{
return UITableViewCellEditingStyleDelete;
}
}
//2、设置编辑执行的操作

• (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
  if (editingStyle == UITableViewCellEditingStyleDelete) {
  [self.contacts removeObjectAtIndex:indexPath.row];
  [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationTop];
  [NSKeyedArchiver archiveRootObject:self.contacts toFile:CZContactPath];
  }else if (editingStyle == UITableViewCellEditingStyleInsert) {
  CZContact *newContact=[[CZContact alloc]init];
  newContact.name=@"rose";
  newContact.phoneNum=@"12345678910";

  [self.contacts insertObject:newContact atIndex:indexPath.row+1];
  
  [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:indexPath.row+1 inSection:0]] withRowAnimation:UITableViewRowAnimationBottom];
  
  NSIndexPath *path = [NSIndexPath indexPathForRow:indexPath.row + 1 inSection:0];
  [self.tableView insertRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationBottom];
  
  [NSKeyedArchiver archiveRootObject:self.contacts toFile:CZContactPath];
  

  }
  }
  ps：tableviewCell是rightDetil模式