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#import <UIKit/UIKit.h>
@interface RootViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>
@end
#import "RootViewController.h"
#import "SecondViewController.h"
@interface RootViewController () {
NSMutableArray *dataArr;
UITableView *myTableView;
}
@end
@implementation RootViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewWillAppear:(BOOL)animated
{
//从上一个界面返回的时候刷新tableView
[myTableView reloadData];
}
- (void)presentToSecondViewController
{
SecondViewController *svc = [[SecondViewController alloc]init];
svc.arr = dataArr;
[self presentViewController:svc animated:YES completion:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
if ([self respondsToSelector:@selector(setAutomaticallyAdjustsScrollViewInsets:)]) {
self.automaticallyAdjustsScrollViewInsets = NO;
}
//取得NSUserDefaults的单例对象
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
//通过key找存放的数组
dataArr = [ud objectForKey:@"vvvv"];
if (!dataArr.count) {
//如果没取到值，就重新开辟空间，并赋值
//没找到的话就是空指针，空指针的任何操作都石沉大海
dataArr = [[NSMutableArray alloc]init];
for (int i = 0; i < 9; i++) {
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"人物%d",i],@"personName",[NSString stringWithFormat:@"135000012%02d",i],@"phoneNumber", nil];
//数组中放的是字典，每个字典有2个键值对，分别代表名字和电话号码
[dataArr addObject:dic];
}
//通过key把数组放到ud里，并且同步
[ud setObject:dataArr forKey:@"vvvv"];
[ud synchronize];
}
myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 64, 320, 480-64) style:UITableViewStylePlain];
myTableView.delegate = self;
myTableView.dataSource = self;
[self.view addSubview:myTableView];
UIBarButtonItem *bbi = [[UIBarButtonItem alloc]initWithTitle:@"+" style:UIBarButtonItemStyleBordered target:self action:@selector(presentToSecondViewController)];
self.navigationItem.rightBarButtonItem = bbi;
}
#pragma mark - tableView
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 50;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return dataArr.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"qwq"];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"qwq"];
}
cell.textLabel.text = [[dataArr objectAtIndex:indexPath.row] objectForKey:@"personName"];
cell.detailTextLabel.text = [[dataArr objectAtIndex:indexPath.row] objectForKey:@"phoneNumber"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
SecondViewController *svc = [[SecondViewController alloc]init];
//数据源指针传过去
svc.arr = dataArr;
//点击的是第几个
svc.i = indexPath.row;
//用1代表push过去的，如果不传默认0的话就是弹过去的
svc.j = 1;
[self.navigationController pushViewController:svc animated:YES];
}
#import <UIKit/UIKit.h>
@interface SecondViewController : UIViewController
//接收上一个页面的数据源
@property (nonatomic,retain) NSMutableArray *arr;
//上一个页面点击的是第几个cell
@property (nonatomic,assign) int i;
//（如果是push过来的j就等于1，弹过来的就为0）
@property (nonatomic,assign) int j;
@end
#import "SecondViewController.h"
@interface SecondViewController () {
UITextField *tf1;
UITextField *tf2;
}
@end
@implementation SecondViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)okbClick
{
if (!tf1.text.length || !tf2.text.length) {
UIAlertView *av = [[UIAlertView alloc]initWithTitle:@"写字呀" message:nil delegate:nil cancelButtonTitle:@"好" otherButtonTitles: nil];
[av show];
return;
}
//点击保存时如果2个tf里都有值就创建一个字典来记录信息
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:tf1.text,@"personName",tf2.text,@"phoneNumber", nil];
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
if (self.j) {
//如果是push过来的就删除原来的，添加新的（修改）
[_arr removeObjectAtIndex:self.i];
[_arr insertObject:dic atIndex:self.i];
[ud setObject:_arr forKey:@"vvvv"];
[ud synchronize];
[self.navigationController popViewControllerAnimated:YES];
return;
}
//如果是弹过来的，直接把字典添加到数据源里（新增）
[_arr addObject:dic];
[ud setObject:_arr forKey:@"vvvv"];
[ud synchronize];
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor whiteColor];
tf1 = [[UITextField alloc]initWithFrame:CGRectMake(50, 80, 220, 30)];
tf1.backgroundColor = [UIColor grayColor];
[self.view addSubview:tf1];
tf2 = [[UITextField alloc]initWithFrame:CGRectMake(50, 120, 220, 30)];
tf2.backgroundColor = [UIColor grayColor];
[self.view addSubview:tf2];
//如果是push过来的话，就把传过来的名字和电话号码写上
if (self.j) {
tf1.text = [[self.arr objectAtIndex:_i] objectForKey:@"personName"];
tf2.text = [[self.arr objectAtIndex:_i] objectForKey:@"phoneNumber"];;
}
UIButton *okb = [UIButton buttonWithType:UIButtonTypeCustom];
okb.frame = CGRectMake(100, 170, 120, 40);
[okb setTitle:@"save" forState:UIControlStateNormal];
[okb setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[okb addTarget:self action:@selector(okbClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:okb];
}
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原文地址：http://www.cnblogs.com/-yun/p/4379164.html
