Add, delete, and modify simple cells

Add, delete, and modify simple cells

 

 

 

 

 

 

 

 

 

 

 

 

 

 

#import <UIKit/UIKit.h>#import "RootTableViewController.h"@interface AppDelegate : UIResponder <UIApplicationDelegate>@property (strong, nonatomic) UIWindow *window;@end

 

 

#import "AppDelegate.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window.rootViewController=[[UINavigationController alloc]initWithRootViewController:[[RootTableViewController alloc]initWithStyle:UITableViewStylePlain]];    return YES;}

 

 

#import <UIKit/UIKit.h>@interface RootTableViewController : UITableViewController@property(strong,nonatomic)  NSMutableArray * array;@end

 

 

# Import "RootTableViewController. h "# import" ViewController. h "@ interface RootTableViewController () <postValuedelegate> {// record the index value of the selected row NSIndexPath * currentInfrxPath;} @ end @ implementation RootTableViewController-(void) viewDidLoad {[super viewDidLoad]; // Add liftbarabutton self. navigationItem. leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAdd target: self action: @ Selector (addItem)]; self. navigationItem. rightBarButtonItem = self. editButtonItem; self. array = [NSMutableArray array]; [self. array addObject: @ "zhangsan"]; [self. array addObject: @ "lisi"]; [self. array addObject: @ "wangwu"]; [self. tableView registerClass: [UITableViewCell class] forCellReuseIdentifier: @ "reuseIdentifier"]; // Uncomment the following line to preserve selection between presentations. // s Elf. clearsSelectionOnViewWillAppear = NO; // Uncomment the following line to display an Edit button in the navigation bar for this view controller .} -(void) addItem {UIAlertController * alertcontroller = [UIAlertController alertControllerWithTitle: @ "are you sure you want to add" message: @ "input name? "PreferredStyle :( partial)]; UIAlertAction * OK = [UIAlertAction actionWithTitle: @" added "style: Adjust handler: ^ (UIAlertAction * _ Nonnull action) {UITextField * textName = alertcontroller. textFields [0]; [self. array addObject: textName. text]; [self. tableView reloadData]; // NSLog (@ "Real Operation") ;}]; [alertcontroller addTextFieldWithConfigurationHandler: ^ (UITextField * _ Nonnull textField) {textField. placeholder = @ "Add name";}]; [alertcontroller addAction: OK]; [self presentViewController: alertcontroller animated: YES completion: nil];}-(void) postvalue :( NSString *) username {// assign self to the element at the specified index position of the set. array [currentInfrxPath. row] = username; NSLog (@ "% @", username); // refresh data [self. tableView reloadData];}-(void) didReceiveMemoryWarning {[super didreceivemorywarning]; // Dispose of any resources that can be recreated .} # pragma mark-Table view data source-(NSInteger) numberOfSectionsInTableView :( UITableView *) tableView {return 1;}-(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) section {return self. array. count;}-(UITableViewCell *) tableView :( UITableView *) tableView cellForRowAtIndexPath :( NSIndexPath *) indexPath {UITableViewCell * cell = [tableView metadata: @ "reuseIdentifier" forIndexPath: indexPath]; cell. textLabel. text = self. array [indexPath. row]; return cell;}-(void) tableView :( UITableView *) tableView didSelectRowAtIndexPath :( NSIndexPath *) indexPath {currentInfrxPath = indexPath; ViewController * vc = [ViewController alloc] init]; vc. name = self. array [indexPath. row]; vc. delegate = self; [self. navigationController pushViewController: vc animated: YES];} // Override to support conditional editing of the table view. -(BOOL) tableView :( UITableView *) tableView canEditRowAtIndexPath :( NSIndexPath *) indexPath {// Return NO if you do not want the specified item to be editable. return YES;} // Override to support editing the table view. -(void) tableView :( UITableView *) tableView commitEditingStyle :( UITableViewCellEditingStyle) editingStyle forRowAtIndexPath :( NSIndexPath *) indexPath {if (editingStyle = UITableViewCellEditingStyleDelete) {// Delete the row from the data source [self. array removeObjectAtIndex: currentInfrxPath. row]; [tableView deleteRowsAtIndexPaths: @ [indexPath] withRowAnimation: UITableViewRowAnimationFade];} else if (editingStyle = inline) {// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view} // Override to support rearranging the table view. -(void) tableView :( UITableView *) tableView moveRowAtIndexPath :( NSIndexPath *) fromIndexPath toIndexPath :( NSIndexPath *) toIndexPath {// 1. locate the NSString * name = self. array [fromIndexPath. row]; // 2. delete the set element [self. array removeObject: name]; // 3 insert a collection [self. array insertObject: name atIndex: toIndexPath. row]; NSLog (@ "% @", self. array);} // Override to support conditional rearranging of the table view. -(BOOL) tableView :( UITableView *) tableView canMoveRowAtIndexPath :( NSIndexPath *) indexPath {// Return NO if you do not want the item to be re-orderable. return YES;}/* # pragma mark-Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation-(void) prepareForSegue :( UIStoryboardSegue *) segue sender :( id) sender {// Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller .} * // @ end

 

 

#import <UIKit/UIKit.h>@protocol postValuedelegate <NSObject>-(void)postvalue:(NSString *) username;@end@interface ViewController : UIViewController<UITextFieldDelegate>@property(strong,nonatomic) NSString *name;@property(strong,nonatomic) UITextField * textNmae;@property(strong,nonatomic) id<postValuedelegate> delegate;@end

 

 

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        self.view.backgroundColor=[UIColor greenColor];    self.textNmae=[[UITextField alloc]initWithFrame:CGRectMake(100, 100, 150, 44)];        self.textNmae.delegate=self;        self.textNmae.borderStyle=1;        self.textNmae.text=self.name;        [self.view addSubview:self.textNmae];}-(BOOL)textFieldShouldReturn:(UITextField *)textField{        if (self.delegate) {        [self.delegate postvalue:textField.text];    }    if ([textField isFirstResponder]) {        [textField resignFirstResponder];    }        [self.navigationController popViewControllerAnimated:YES];        return YES;}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end