iOS development UI Chapter-Implementing UITableView Control Data Refresh

iOS development UI Chapter-Implementing UITableView Control Data Refresh

I. Project document structure and plist file

Second, the realization effect

1. Description: This is a hero display interface, click on the selected line, you can modify the name of the row hero (the operation to complete the data refresh).

Operating interface:

Click on the selected line:

Automatic refresh after modifying data:

Third, code example

Data Model section:

YYheros.h file

1//2//  YYheros.h 3//  10-Hero display (data refresh) 4//5//  Created by Apple on 14-5-29.6//  Copyright (c) 2014 ITC Ase. All rights reserved. 7//8  9 #import <foundation/foundation.h>10 #import "Global.h" @interface yyheros:nsobject13 @property (n onatomic,copy) nsstring *name;14 @property (nonatomic,copy) nsstring *icon;15 @property (nonatomic,copy) NSString *intro ;//-(Instancetype) initwithdict: (nsdictionary *) dict;18//+ (instancetype) heroswithdict: (Nsdictionary *) dict;19 Yyinith (Hero) @end

YYHEROS.M file

1//2//  YYHEROS.M 3//  10-Hero display (data refresh) 4//5//  Created by Apple on 14-5-29.6//  Copyright (c) 2014 ITC Ase. All rights reserved. 7//8  9 #import "YYheros.h" @implementation YYheros12//-(instancetype) initwithdict: (nsdictionary *) dict13//{ +/    if (self=[super init]) {////        self.name=dict[@ "name"];16////self.icon=dict[@        "icon"];17////        self.intro=dict[@ "Intro"];18//+////        use KVC20//        [self setvaluesforkeyswithdictionary:dict]; +//    }22//    return self;23//}24//25//+ (instancetype) heroswithdict: (nsdictionary *) dict26//{27//    return [self alloc]initwithdict:dict];28//}29 yyinitm (Hero) @end

Host controller YYVIEWCONTROLLER.M file

  1//2//YYVIEWCONTROLLER.M 3//10-Hero Display (data refresh) 4//5//Created by Apple on 14-5-29. 6//Copyright (c) 2014 itcase.  All rights reserved. 7//8 9 #import "YYViewController.h" #import "YYheros.h" @interface Yyviewcontroller () <uitableviewdataso Urce,uialertviewdelegate,uitableviewdelegate> @property (Strong, nonatomic) Iboutlet UITableView *tableview; @property (Nonatomic,strong) Nsarray *heros;  @end @implementation Yyviewcontroller-(void) viewdidload {[Super viewdidload]; 22//Set Data source self.tableview.datasource=self; self.tableview.delegate=self; SELF.TABLEVIEW.ROWHEIGHT=60.F; NSLog (@ "%d", self.heros.count); #pragma mark-Lazy load-(Nsarray *) heros {+ if (_heros==nil) {NSString *fullpat H=[[nsbundle mainbundle]pathforresource:@ "Heros.plist" oftype:nil]; Nsarray *temparray=[nsarray Arraywithcontentsoffile:fullpath]; Approx. NSMutablearray *arraym=[nsmutablearray Array];             Nsdictionary *dict in Temparray) {Yyheros *hero=[yyheros heroswithdict:dict]; 40 [Arraym Addobject:hero]; _heros=[arraym Mutablecopy]; The _heros return; The processing of the #pragma mark-tableview 48//How many groups (Nsinteger) Numberofsectionsintableview: (UITableView *) TableView 50 {5 1 return 1; 52} 53//How many lines-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (nsinteger) section, retur n Self.heros.count; 57} 58/per set of data per row, set cell-(UITableViewCell *) TableView: (UITableView *) TableView Cellforrowatindexpath: (Nsindexpath * ) Indexpath {//nslog (@ "Cellforrowatindexpath modified%d", indexpath.row); 62//1. Go to the cache and take the static NSString * [email protected] "hero"; UITableViewCell *cell=[tableview Dequeuereusablecellwithidentifier:identifier]; 65//2. If not, create your own if (Cell==nil) {NSLog (@ "Chuangjiancell"); Cell=[[uitableviewcell Alloc]initwithstyle:uitableviewcellstyledefault Reuseidentifier:identifier]; 69} 70//3. Set Data 71 72//3.1 Get the line model Yyheros *hero=self.heros[indexpath.row]; Cell.textlabel.text=hero.name; Cell.imageview.image=[uiimage ImageNamed:hero.icon]; Cell.detailtextlabel.text=hero.intro; 77//4. Return cell with return cell; The #pragma mark-data refresh 82//1. Pop-up window, get data 83//Call this method when a row is selected (void) TableView: (UITableView *) TableView Didselect Rowatindexpath: (Nsindexpath *) Indexpath 85 {86//Get the data model of the diverted Yyheros *hero=self.heros[indexpath.row]; UIA Lertview *alert=[[uialertview alloc]initwithtitle:@ "Modify data" Message:nil delegate:self cancelbuttontitle:@ "Cancel" otherbuttontitles:@ "OK", nil]; 89 90//Password box in the form of the//alert.alertviewstyle=uialertviewstylesecuretextinput; Alert.alertviewstyle=uialertviewstyleplaintextinput; Uitextfield *text=[alert textfieldatindex:0]; 94//Show the hero data of the current line to the textIn this box, Text.text=hero.name; Alert.tag=indexpath.row; [Alert show]; 98} 99//2. Modify the data to complete the refresh operation (void) Alertview: (Uialertview *) Alertview Clickedbuttonatindex: (Nsinteger) buttonIndex101 { 102//1. Modify Model 103//If Cancel is selected, then return, do nothing 104 if (0==buttonindex) return;105//Otherwise modify the model, refresh the data 106 Yyheros *h ERO=SELF.HEROS[ALERTVIEW.TAG];107 108//Get the text data (modified data) in the current pop-up window 109 Uitextfield *text=[alertview Textfieldatinde X:0];110//Use modified data to modify the Model 111 hero.name=text.text;112 113//2. Refresh Data 114//The method that calls TableView will automatically recall all methods of the data source     115//will automatically call numberOfSectionsInTableView116//will automatically call numberOfRowsInSection117//will automatically call cellForRowAtIndexPath118 [Self.tableview reloaddata];119 120//Refresh specified line 121 nsindexpath *path = [Nsindexpath indexpathforrow:a Lertview.tag insection:0];122 [Self.tableview Reloadrowsatindexpaths:@[path] Withrowanimation:uitableviewrowanimat ionright];123//What happens if I don't refresh? (It will not be refreshed immediately after the change, it will not be brushed until the cell is re-populated.)New) 124}125//Hide Status bar 126-(BOOL) prefersStatusBarHidden127 {yes;129}130 @end 

Iv. encapsulating common code into a macro with parameters

Encapsulation Methods and code:

1//2//  Global.h 3//  10-Hero display (data refresh) 4//5//  Created by Apple on 14-5-29.6//  Copyright (c) 2014 ITCA Se. All rights reserved. 7//8  9 #ifndef _0____________global_h10 #define _0____________GLOBAL_H11/**13  *  custom macros with parameters  #define     Yyinith (name)   -(Instancetype) Initwithdict: (Nsdictionary *) dict;16 + (instancetype) Heroswithdict: (nsdictionary *) dict;17 #define     yyinitm (name)  -(Instancetype) Initwithdict: ( Nsdictionary *) dict20 {     if (self=[super init]) {[Self         setvaluesforkeyswithdictionary:dict];23     }     return self;25}26 + (instancetype) heroswithdict: (Nsdictionary *) dict28 {     return [[Self alloc] Initwithdict:dict];30}31 #endif

In the future, when you need to use it, you only need to use a macro.

If you use YYINITM (Hero) in a yyheros.m file, this code can replace the following code snippet:

-(Instancetype) Initwithdict: (nsdictionary *) dict{    if (self=[super init]) {//        self.name=dict[@ "name"];//        self.icon=dict[@ "icon"];//        self.intro=dict[@ "Intro"];                Use KVC        [self setvaluesforkeyswithdictionary:dict];    }    return self;} + (Instancetype) heroswithdict: (nsdictionary *) dict{    return [[Self alloc]initwithdict:dict];}

Five, the attention point

1. Two steps to refresh data:

1) Modify the model

2) Refresh the table data (you can refresh all or refresh the specified row)

2. In the master controller file, three protocols are adhered to

respectively:

Uitableviewdatasource,

Uialertviewdelegate,

Uitableviewdelegate

iOS Development UI chapter-Implementing UITableView Control Data Refresh