UITableView of adding and deleting

APPDELEGATE.M file

#import "AppDelegate.h"

#import "RootTableViewController.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;

}

ViewController.h file

#import <UIKit/UIKit.h>

1. Create an agreement

@protocol postviewdelegate <NSObject>

-(void) Postvalue: (NSString *) userName;

@end

@interface viewcontroller:uiviewcontroller<uitextfielddelegate>

@property (strong,nonatomic) NSString *name;

@property (strong,nonatomic) Uitextfield *textname;

@property (strong,nonatomic) ID <PostViewDelegate> Delegatepp;

@end

VIEWCONTROLLER.M file

#import "ViewController.h"

@interface Viewcontroller ()

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Self.view.backgroundcolor=[uicolor Greencolor];

Self.textname=[[uitextfield alloc]initwithframe:cgrectmake (100, 100, 200, 44)];

self.textname.delegate=self;

Self.textname.backgroundcolor=[uicolor Lightgraycolor];

Text Assignment

Self.textname.text=self.name;

Set Border Style

self.textname.borderstyle=1;

[Self.view AddSubview:self.textName];

}

-(BOOL) Textfieldshouldreturn: (Uitextfield *) TextField

{

if (Self.delegatepp) {

[Self.delegatepp PostValue:textField.text];

}

Keyboard control

if ([TextField Isfirstresponder]) {

[TextField Resignfirstresponder];

}

Out of the stack, showing the previous page

[Self.navigationcontroller Popviewcontrolleranimated:yes];

return YES;

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

@end

RootTableViewController.h file

#import <UIKit/UIKit.h>

@interface Roottableviewcontroller:uitableviewcontroller

@property (strong,nonatomic) Nsmutablearray *students;

@end

ROOTTABLEVIEWCONTROLLER.M file

#import "RootTableViewController.h"

#import "ViewController.h"

@interface Roottableviewcontroller () <PostViewDelegate>

{

Member variables: Store index values for each click

Nsindexpath *currentindexpath;

}

@end

@implementation Roottableviewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Edit delete on the navigation bar

Self.navigationItem.rightBarButtonItem = Self.editbuttonitem;

Add Leftbarbuttonitem Increase

Self.navigationitem.leftbarbuttonitem=[[uibarbuttonitem Alloc]initwithbarbuttonsystemitem:4 target:self action:@ Selector (AddItem)];

Data source

Self.students=[nsmutablearray arraywithcapacity:0];

[Self.students addobject:@ "Lisi"];

[Self.students addobject:@ "Zhangsan"];

[Self.students addobject:@ "Zhaoliu"];

[Self.students addobject:@ "Wangwu"];

Specify the reusable cell unique identity

[Self.tableview Registerclass:[uitableviewcell class] forcellreuseidentifier:@ "MyCell"];

}

Increase

-(void) AddItem

{

Uialertcontroller *alertcontroller=[uialertcontroller alertcontrollerwithtitle:@ "Add student Information" message:@ "Enter Name" Preferredstyle:uialertcontrollerstylealert];

Uialertaction *actionadd=[uialertaction actionwithtitle:@ "Add" Style:uialertactionstyledefault handler:^ ( Uialertaction * _nonnull action) {

Uitextfield *textname = alertcontroller.textfields[0];

[Self.students AddObject:textName.text];

NSLog (@ "True hyper-object");

[Self.tableview Reloaddata];

}];

[Alertcontroller addtextfieldwithconfigurationhandler:^ (Uitextfield * _nonnull TextField) {

[Email protected] "Inpus name";

}];

[Alertcontroller Addaction:actionadd];

[Self Presentviewcontroller:alertcontroller animated:yes completion:^{

}];

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

#pragma mark-table View data source

Returns the number of partitions

-(Nsinteger) Numberofsectionsintableview: (UITableView *) TableView {

return 1;

}

Returns the number of rows per partition displayed

-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (nsinteger) Section

{

return self.students.count;

}

-(UITableViewCell *) TableView: (UITableView *) TableView Cellforrowatindexpath: (Nsindexpath *) Indexpath {

UITableViewCell *cell = [TableView dequeuereusablecellwithidentifier:@ "MyCell" Forindexpath:indexpath];

What the main title displays

Cell.textlabel.text=self.students[indexpath.row]

;

return cell;

}

-(void) TableView: (UITableView *) TableView Didselectrowatindexpath: (Nsindexpath *) Indexpath

{

Viewcontroller *view=[[viewcontroller Alloc]init];

Assign value

View.name=self.students[indexpath.row];

Specifying proxy objects

view.delegatepp=self;

Index value for each click

Currentindexpath=indexpath;

Next page

[Self.navigationcontroller Pushviewcontroller:view Animated:yes];

}

Implementation of Proxy Protocol method

-(void) Postvalue: (NSString *) userName

{

Self.students[currentindexpath.row]=username;

Refresh, Reload

[Self.tableview Reloaddata];

}

Override to support conditional editing of the table view.

-(BOOL) TableView: (UITableView *) TableView Caneditrowatindexpath: (Nsindexpath *) Indexpath {

Return NO If you don't want the specified item to be editable.

return YES;

}

Delete

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.students Removeobject:self.students[indexpath.row]];

Reload, equivalent to [Self.tableview Reloaddata], just delete which row, refresh which line, Withrowanimation:uitableviewrowanimationfade is add an animation effect

[TableView Deleterowsatindexpaths:@[indexpath] withrowanimation:uitableviewrowanimationfade];

}

else if (Editingstyle = = Uitableviewcelleditingstyleinsert) {

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 {

Finds the collection element at the specified location

NSString *name=self.students[fromindexpath.row];

Delete this collection element

[Self.students Removeobject:name];

Inserts this collection element to the specified position

[Self.students Insertobject:name AtIndex:toIndexPath.row];

NSLog (@ "%@", self.students);

}

Override to support conditional rearranging of the table view.

-(BOOL) TableView: (UITableView *) TableView Canmoverowatindexpath: (Nsindexpath *) Indexpath {

Return NO If you don't want the item to be re-orderable.

return YES;

}

@end

UITableView of adding and deleting