Simple usage of UITableView

#import "AppDelegate.h"

@interface Appdelegate ()

@end

@implementation Appdelegate

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {

Initializes an object of a Viewcontroller

Viewcontroller *view = [[Viewcontroller alloc] init];

Add the navigation bar to the top

Uinavigationcontroller *NAVC = [[Uinavigationcontroller alloc] initwithrootviewcontroller:view];

Self.window.rootViewController = NAVC;

Initialize a second page

Secondviewcontroller *SECONDVC = [[Secondviewcontroller alloc] init];

//

SecondVc.tabBarItem.title = @ "Second";

SecondVc.tabBarItem.badgeValue = @ "2";

Uitabbarcontroller *tabbarcon = [[Uitabbarcontroller alloc] init];

Tabbarcon.tabBar.tintColor = [Uicolor Greencolor];

[Tabbarcon SETVIEWCONTROLLERS:@[NAVC,SECONDVC]];

Self.window.rootViewController =tabbarcon;

return YES;

}

#import <UIKit/UIKit.h>

#import "SecondViewController.h"

@interface viewcontroller:uiviewcontroller<uitableviewdatasource,uitableviewdelegate>

@property (nonatomic, strong) UITableView *tablev;

@property (nonatomic, strong) Nsmutablearray *arry;

@end

#import "ViewController.h"

@interface Viewcontroller ()

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Set the biaot of the navigation bar

Self.title = @ "First";

Set a button that triggers a jump to the next page

Self.navigationItem.rightBarButtonItem = [[Uibarbuttonitem alloc] initwithimage:[uiimage imagenamed:@ "Arrow_normal" ] Style:uibarbuttonitemstyleplain target:self Action: @selector (Tableview:didselectrowatindexpath:)];

Initializing a variable group

Self.arry = [Nsmutablearray array];

Loop to assign values to an array

for (int i = 0; i<; i++) {

[Self.arry addobject:[nsstring stringwithformat:@ "%i%i", I,i]];

}

Initialize the size and style of the Tablev

Self.tablev = [[UITableView alloc] InitWithFrame:self.view.frame Style:uitableviewstyleplain];

Specifies that the Self.tableV.delegate proxy is self

Self.tableV.delegate = self;

Set the color for the separator bar

Self.tableV.separatorColor = [Uicolor Bluecolor];

Specifies that the Self.tableV.dataSource proxy is self

Self.tableV.dataSource = self;

Load the Tablev on the view

[Self.view AddSubview:self.tableV];

Specifies the unique identity of the cell

[Self.tablev Registerclass:[uitableviewcell class] forcellreuseidentifier:@ "cell"];

}

Define a global variable to receive the index Indexpath.row

int num;

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

Set the number of rows to display per partition

-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (Nsinteger) section{

return self.arry.count;

}

What each cell displays

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

static NSString *cellidentity = @ "Cell";

Cell reuse mechanism

UITableViewCell *cell = [TableView dequeuereusablecellwithidentifier:cellidentity Forindexpath:indexpath];

Cell.textLabel.text = Self.arry[indexpath.row];

Cell.textLabel.textAlignment = Nstextalignmentcenter;

Add a background color to the cell

Cell.backgroundcolor = [Uicolor Yellowcolor];

return cell;

}

Proxy method, which displays information for the selected cell

-(void) TableView: (UITableView *) TableView Didselectrowatindexpath: (Nsindexpath *) indexpath{

Initializes an Secondviewcontroller object

Secondviewcontroller *second = [[Secondviewcontroller alloc] init];

Assign the value of Self.arry[indexpath.row] to Second.str

Second.str = Self.arry[indexpath.row];

Receive the appropriate index with NUM

num = (int) Indexpath.row;

Defines the value of a string str receives Self.arry[indexpath.row]

NSString *str =self.arry[indexpath.row];

Initialize a cue bar Uialertcontroller object and assign him the value

Uialertcontroller *alertc= [Uialertcontroller alertcontrollerwithtitle:@ "You are sure to click on it" Message:str PreferredStyle: Uialertcontrollerstylealert];

Define two uialertaction, *action2 cancel

Uialertaction *action2 = [uialertaction actionwithtitle:@ "Cancel" Style:uialertactionstyledefault Handler:nil];

*action1 OK

Uialertaction *action1 = [uialertaction actionwithtitle:@ "OK" Style:uialertactionstyledefault handler:^ ( Uialertaction * _nonnull action) {

Click OK to go to the next page

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

}];

Add the Action1,action2 to the ALERTC

[ALERTC Addaction:action1];

[ALERTC Addaction:action2];

Show ALERTC

[Self PRESENTVIEWCONTROLLER:ALERTC animated:yes completion:nil];

}

Add a listener before the form is loaded

-(void) Viewwillappear: (BOOL) animated{

[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (mypostvalue:) name:@ "Lamco" object:nil];

}

Add Observer

-(void) Mypostvalue: (nsnotification *) noti{

[Self.arry Replaceobjectatindex:num WithObject:noti.object];

[Self.tablev Reloaddata];

}

Removing observers

-(void) dealloc{

[[Nsnotificationcenter Defaultcenter] removeobserver:self name:@ "Lamco" object:nil];

NSLog (@ "destroy notice, remove observer");

}

@end

#import <UIKit/UIKit.h>

@protocol postvaluedelegate <NSObject>

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

@end

@interface secondviewcontroller:uiviewcontroller<uitextfielddelegate>

@property (nonatomic, strong) NSString *str;

@property (nonatomic, strong) Uitextfield *textfld;

@property (nonatomic, assign) id<postvaluedelegate> delegate;

@end

#import "SecondViewController.h"

@interface Secondviewcontroller ()

@end

@implementation Secondviewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Add a background picture

Uiimageview *imagev= [[Uiimageview alloc] initWithFrame:self.view.frame];

Imagev.image = [UIImage imagenamed:@ "82r58picyem_1024.jpg"];

Self.view.backgroundColor = [Uicolor colorWithPatternImage:imageV.image];

Initial text Box textfld

SELF.TEXTFLD = [[Uitextfield alloc] Initwithframe:cgrectmake (100, 200, 200, 100)];

Set a background picture for a text box

Uiimageview *IMAGEV1 = [[Uiimageview alloc] initWithFrame:self.textfld.frame];

Imagev1.image = [UIImage imagenamed:@ "27u58picvxi_1024.jpg"];

Self.textfld.backgroundColor = [Uicolor colorWithPatternImage:imageV1.image];

Specify Proxy

Self.textfld.delegate = self;

Passing value to text box by property str

Self.textfld.text = Self.str;

Center the text

Self.textfld.textAlignment = Nstextalignmentcenter;

Show Textfld on view

[Self.view ADDSUBVIEW:SELF.TEXTFLD];

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

Hide keyboard

-(BOOL) Textfieldshouldreturn: (Uitextfield *) textfield{

1. Notice

Nsnotification *noti = [[Nsnotification alloc] initwithname:@ "Lamco" Object:textField.text Userinfo:nil];

Uniseriate

[[Nsnotificationcenter Defaultcenter] postnotification:noti];

if ([TextField Isfirstresponder]) {

[TextField Resignfirstresponder];

}

[Self.navigationcontroller Poptorootviewcontrolleranimated:yes];

return YES;

}

@end

Simple usage of UITableView