[iOS基础控件 - 6.5] UITableView的数据刷新

A.需求

1.以LOL英雄列表为蓝本，给其加上实时修改英雄名称的功能

2.使用UIAlertView

3.全局刷新reloadData

4.局部刷新

B.实现

1.使用UIAlertView

    // 弹窗

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"修改英雄名称" message:nil delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

2.全局刷新reloadData

    // 刷新数据
    // 1.全局刷新

   [self.tableView reloadData];

3.局部刷新

    // 2.局部刷新
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:alertView.tag inSection:0];

    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

C.主要代码

 //
 //  Hero.h
 //  LOLHero
 //
 //  Created by hellovoidworld on 14/12/1.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import <Foundation/Foundation.h>

 @interface Hero : NSObject

 @property(nonatomic, copy) NSString *icon;
 @property(nonatomic, copy) NSString *intro;
 @property(nonatomic, copy) NSString *name;

 - (instancetype) initWithDictionary:(NSDictionary *) dictionary;
 + (instancetype) heroWithDictionary:(NSDictionary *) dictionary;
 + (instancetype) hero;

 @end

 //
 //  Hero.m
 //  LOLHero
 //
 //  Created by hellovoidworld on 14/12/1.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import "Hero.h"

 @implementation Hero

 - (instancetype) initWithDictionary:(NSDictionary *) dictionary {
     if (self = [super init]) {
 //        self.icon = dictionary[@"icon"];
 //        self.intro = dictionary[@"intro"];
 //        self.name = dictionary[@"name"];
         // 代替上方代码, 使用KVC
         [self setValuesForKeysWithDictionary:dictionary];
     }

     return self;
 }

 + (instancetype) heroWithDictionary:(NSDictionary *) dictionary {
     return [[self alloc] initWithDictionary:dictionary];
 }

 + (instancetype) hero {
     return [self heroWithDictionary:nil];
 }

 @end

 //
 //  ViewController.m
 //  LOLHero
 //
 //  Created by hellovoidworld on 14/12/1.
 //  Copyright (c) 2014年 hellovoidworld. All rights reserved.
 //

 #import "ViewController.h"
 #import "Hero.h"

 // 遵守了UITableViewDelegate才能响应行点击事件, 遵守UIAlertViewDelegate处理弹窗的事件
 @interface ViewController () <UITableViewDataSource, UITableViewDelegate, UIAlertViewDelegate>

 // UITableView
 @property (weak, nonatomic) IBOutlet UITableView *tableView;

 // 所有hero资料
 @property(nonatomic, strong) NSArray *heros;

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.

     // 设置dataSource
     self.tableView.dataSource = self;

     // 设置行高
     self.tableView.rowHeight = ;

     // 设置delegate
     self.tableView.delegate = self;
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 /** 隐藏状态栏 */
 - (BOOL)prefersStatusBarHidden {
     return YES;
 }

 /** 延迟加载hero数据 */
 - (NSArray *) heros {
     if (nil == _heros) {
         NSArray *dictArray = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"heros.plist" ofType:nil]];

         NSMutableArray *herosArray = [NSMutableArray array];
         for (NSDictionary *dict in dictArray) {
             Hero *hero = [Hero heroWithDictionary:dict];
             [herosArray addObject:hero];
         }

         _heros = herosArray;
     }

     return _heros;
 }

 #pragma mark - 列表方法

 // section数, 默认是1
 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
     return ;
 }

 // 特定section的行数
 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
     return self.heros.count;
 }

 // 特定行的内容
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
     Hero *hero = self.heros[indexPath.row];

     // 使用static修饰局部变量，能保证只分配一次存储空间
     static NSString *hereCellId = @"hero";

     // 使用特定标识符, 从缓存池查看时候有适合的cell存在
     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:hereCellId];

     if (nil == cell) {
         // 创建的时候指定标识符
         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:hereCellId];
     }

     // 标题
     cell.textLabel.text = hero.name;

     // 副标题
     cell.detailTextLabel.text = hero.intro;

     // 图标
     cell.imageView.image = [UIImage imageNamed:hero.icon];

     return cell;
 }

 #pragma mark - 响应事件

 /** 点击选中某行 */
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
     // 取得model
     Hero *hero = self.heros[indexPath.row];

     // 弹窗
     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"修改英雄名称" message:nil delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

     // 设置delegate，也可以在init方法中指定
     alertView.delegate = self;

     // 设置弹窗样式
     alertView.alertViewStyle = UIAlertViewStylePlainTextInput;

     // 设置弹窗输入框内容
     [alertView textFieldAtIndex:].text = hero.name;

     // 保存index
     alertView.tag = indexPath.row;

     // 显示弹窗
     [alertView show];
 }

 /** 处理弹窗点击“确定”按钮事件 */
 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
     // 取消
     if ( == buttonIndex) return;

     // 确定
     // 保存新的名字到model
     Hero *hero = self.heros[alertView.tag];
     hero.name = [alertView textFieldAtIndex:].text;

     // 刷新数据
     // 1.全局刷新
 //    [self.tableView reloadData];

     // 2.局部刷新
     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:alertView.tag inSection:];
     [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

 }

 @end