iOS设计之 表格UITableView 的参数与视图页面之间的相互传递

设计思路:创建一个表格 ，在表格中用集合创建数据源 ，点击表格中的参数，并将之传递给一个视图页面，在视图页面中创建一个文本框用于接收传递的结果，之后对就到的参数进行修改，并将之传回表格中，同上步骤可以继续操作；

 

代码实现如下；

1、 AppDelegate.h

#import <UIKit/UIKit.h>
#import "ViewController.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

 

AppDelegate.m

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        ViewController *VC=[[ViewController alloc]init];

        //设置导航栏

    UINavigationController *navigatonC=[[UINavigationController alloc]initWithRootViewController:VC];

 

    self.window.rootViewController=navigatonC;
    return YES;

}

 

2、创建表格的视图页面

ViewController.h

#import <UIKit/UIKit.h>
#import "FirstViewController.h"
//遵循协议

@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource,posValueDlegate>

@property(strong,nonatomic)UITableView *tableV;//表格

@property(strong,nonatomic)NSMutableArray *Array;//存数据源的集合

@property(strong,nonatomic)NSString *string;

@property(assign,nonatomic)int  num;

@end

 

 ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
//    self.view.backgroundColor=[UIColor greenColor];
    self.title=@"通信录";
  
    //数据源
    self.Array=[NSMutableArray arrayWithCapacity:20];
    [self.Array  addObject:@"AAAAAA"];
     [self.Array  addObject:@"BBBBBB"];
     [self.Array  addObject:@"CCCC"];
     [self.Array  addObject:@"DDDDDD"];
     [self.Array  addObject:@"EEEEEE"];
   

    //初始化表格
    self.tableV=[[UITableView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) style:UITableViewStylePlain];
    self.tableV.backgroundColor=[UIColor whiteColor];
    //代理
    self.tableV.delegate=self;
    self.tableV.dataSource=self;

    //添加
    [self.view addSubview:self.tableV];
    //重用单元标识
    [self.tableV registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];
    self.tableV.separatorColor=[UIColor blueColor];
   
   
    //按钮项
    UIBarButtonItem *barButtontiem=[[UIBarButtonItem alloc]initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(nextPage)];
   
    self.navigationItem.rightBarButtonItem=barButtontiem;
   
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.Array.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellidentifier=@"cell";
   UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellidentifier forIndexPath:indexPath];
    cell.textLabel.text=self.Array[indexPath.row];
 
  
    return cell;
}
//选中行的内容
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
  NSLog(@"%@",self.Array[indexPath.row]);
     //把集合里的元素提取出来赋值给 string
    self.string=self.Array[indexPath.row];
}


-(void)nextPage
{
    FirstViewController *firstVC=[[FirstViewController alloc]init];
    firstVC.str=self.string;
    //代理
    firstVC.delegate=self;
   //切换到下一页面
    [self.navigationController pushViewController:firstVC animated:YES];
   
}
//实现协议方法
-(void)posValueDlegate:(NSString *)str
{
    //把firstViewController传过来的值添加到集合 array 中
    [self.Array replaceObjectAtIndex:self.num withObject:str];
    [self.tableV reloadData];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be
   
}

@end

 

3、接收表格参数的视图

FirstViewController.h

#import <UIKit/UIKit.h>

//声明协议

@protocol posValueDlegate<NSObject>
-(void)posValueDlegate:(NSString *)str;

@end

 

@interface FirstViewController : UIViewController<UITextFieldDelegate>
@property(strong,nonatomic)NSString *str;
@property(strong,nonatomic)id<posValueDlegate>delegate;
@property(strong,nonatomic)UITextField *textName;

@end

FirstViewController.m

#import "FirstViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   self.view.backgroundColor=[UIColor yellowColor];
    self.title=@"通信录";
    //按钮项
    UIBarButtonItem *barButtonTtem=[[UIBarButtonItem alloc]initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(BackPage)];
    self.navigationItem.leftBarButtonItem=barButtonTtem;
   
    //创建文本框
    self.textName=[[UITextField alloc]initWithFrame:CGRectMake(100, 100, 200, 50)];
    self.textName.borderStyle=1;
    //代理
    self.textName.delegate=self;
    self.textName.text=self.str;
    [self.view addSubview:self.textName];
}
-(void)BackPage

{

    //切换页面

    [self.navigationController popToRootViewControllerAnimated:YES];

}

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    //调用代理
    if (self.delegate) {
        [self.delegate posValueDlegate:self.textName.text];
    }
    //隐藏键盘
    if ([textField isFirstResponder]) {
        [textField resignFirstResponder];
    }
    return YES;
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];

    

}

 

@end

 

4、效果

点中表格中的内容——》接收到内容

修改之后的内容—————》表格中接收到的内容