IOS5基础十七------可编辑的详细单元格

详细的单元格包含很多控件，并且数据更加复杂，需要一个自定义Object-c 数据对象存放将在列表中显示的各个实例。

一个自定义Object-c 数据对象一个是父视图和子视图

#import <Foundation/Foundation.h>

#define kPresidentNumberKey  @"President"

#define kPresidentNameKey    @"Name"

#define kPresidentFromKey    @"FromYear"

#define kPresidentToKey      @"ToYear"

#define kPresidentPartyKey   @"Party"

@interface BIDPresident :NSObject<NSCoding>

@property int number;

@property (nonatomic,copy)NSString *name;

@property (nonatomic,copy)NSString *fromYear;

@property (nonatomic,copy)NSString *toYear;

@property (nonatomic,copy)NSString *party;

@end

#import "BIDPresident.h"

@implementation BIDPresident

@synthesize number;

@synthesize name;

@synthesize fromYear;

@synthesize toYear;

@synthesize party;

#pragma mark -

#pragma mark NSCoding

-(void)encodeWithCoder:(NSCoder *)Coder

{

    [Coder encodeInt:self.numberforKey:kPresidentNumberKey];

    [Coder encodeObject:self.nameforKey:kPresidentNameKey];

    [Coder encodeObject:self.fromYearforKey:kPresidentFromKey];

    [Coder encodeObject:self.toYearforKey:kPresidentToKey];

    [Coder encodeObject:self.partyforKey:kPresidentPartyKey];

}

-(id)initWithCoder:(NSCoder *)coder

{

   if (self=[superinit]) {

        number=[coderdecodeIntForKey:kPresidentNumberKey];

        name=[coderdecodeObjectForKey:kPresidentNameKey];

        fromYear =[coderdecodeObjectForKey:kPresidentFromKey];

        toYear =[coderdecodeObjectForKey:kPresidentToKey];

        party =[coderdecodeObjectForKey:kPresidentPartyKey];

    }

    return self;

}

@end

父视图

#import "BIDSecondLevelViewController.h"

@interface BIDPresidentsViewController :BIDSecondLevelViewController

@property (strong,nonatomic)NSMutableArray *list;

@end

#import "BIDPresidentsViewController.h"

#import "BIDPresidentDetailController.h"

#import "BIDPresident.h"

@implementation BIDPresidentsViewController

@synthesize list;

-(void)viewDidLoad

{

    [superviewDidLoad];

    NSString *path=[[NSBundlemainBundle]pathForResource:@"Presidents"ofType:@"plist"];

    NSData *data;

    NSKeyedUnarchiver *unarchiver;

    //对象存放临时编码初始化后并存放到数组中

    data =[[NSDataalloc]initWithContentsOfFile:path];

    unarchiver= [[NSKeyedUnarchiveralloc]initForReadingWithData:data];

   NSMutableArray *array = [unarchiverdecodeObjectForKey:@"Presidents"];

   self.list =array;

    [unarchiverfinishDecoding];

}

-(void)viewWillAppear:(BOOL)animated

{

    //当用户更改了详细信息视图中的内容，为了确保父视图重新加载这些新数据。只是做了强制重新加载。

    [superviewWillAppear:animated];

    [self.tableViewreloadData];

}

#pragma mark -

#pragma mark Table Data Source Methods

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

   return [listcount];

}

-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

   staticNSString *PresidentListCellIdentifier=@"PresidentListCellIdentifier";

   UITableViewCell *cell=[tableViewdequeueReusableCellWithIdentifier:PresidentListCellIdentifier];

   if (cell==nil) {

        cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleSubtitlereuseIdentifier:PresidentListCellIdentifier];

    }

   NSInteger row =[indexPathrow];

   BIDPresident *thePres=[self.listobjectAtIndex:row];

    cell.textLabel.text=thePres.name;

    cell.detailTextLabel.text=[NSStringstringWithFormat:@"%@-%@",thePres.fromYear,thePres.toYear];

   return cell;   

}

#pragma mark -

#pragma mark Table Delegate Methods

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

   NSInteger row =[indexPathrow];

   BIDPresident *prez =[self.listobjectAtIndex:row];

    BIDPresidentDetailController *childController =[[BIDPresidentDetailControlleralloc]initWithStyle:UITableViewStyleGrouped];

    childController.title=prez.name;

    childController.president =prez;//这里必须时detail表h文件声明后才会出现

    [self.navigationControllerpushViewController:childControlleranimated:YES];

}

@end

子视图

#import <UIKit/UIKit.h>

@class BIDPresident;

#define kNumberOfEditableRows    4

#define kNameRowIndex            0

#define kFromYearRowIndex        1

#define kToYearRowIndex          2

#define kPartyIndex              3

#define kLabelTag                4096

@interface BIDPresidentDetailController :UITableViewController

<UITextFieldDelegate>

@property (strong,nonatomic)BIDPresident *president;

@property (strong,nonatomic)NSArray *filedLabels;

@property(strong,nonatomic)NSMutableDictionary *tempValues;

@property (strong,nonatomic)UITextField *currentTextFiled;

-(IBAction)cancel:(id)sender;

-(IBAction)save:(id)sender;

-(IBAction)textFieldDone:(id)sender;

@end

#import "BIDPresidentDetailController.h"

#import "BIDPresident.h"

@implementation BIDPresidentDetailController

@synthesize president;

@synthesize filedLabels;

@synthesize tempValues;

@synthesize currentTextFiled;

-(IBAction)cancel:(id)sender

{

    [self.navigationControllerpopViewControllerAnimated:YES];//单击按钮Cancel当前视图出栈，下个视图升到栈的顶部

}

-(IBAction)save:(id)sender

{

    //检查是否当前有正被编辑的文本字段，有的话将值存放到tempvalues中

    if (currentTextFiled !=nil) {

        NSNumber* tagAsNum=[NSNumbernumberWithInt:currentTextFiled.tag];

        [tempValuessetObject:currentTextFiled.textforKey:tagAsNum];

    }

    //遍历字段中的键值对，将tempvalues数组的适当值分配给president指定字段

  for(NSNumber *keyin [tempValuesallKeys])

  {

     switch ([keyintValue]) {

          casekNameRowIndex:

              president.name=[tempValuesobjectForKey:key];

             break;

          casekFromYearRowIndex:

              president.fromYear=[tempValuesobjectForKey:key];

             break;

          casekToYearRowIndex:

              president.toYear=[tempValuesobjectForKey:key];

             break;

         casekPartyIndex:

              president.party=[tempValuesobjectForKey:key];

             break;

         default:

             break;

      }

  }

    //返回列表

    [self.navigationControllerpopViewControllerAnimated:YES];

    //重新加载数据

    NSArray *allController=self.navigationController.viewControllers;

   UITableViewController *parent =[allControllerlastObject];

    [parent.tableViewreloadData];

}

-(IBAction)textFieldDone:(id)sender

{

    //当用户单击Done后关闭键盘

    [sender resignFirstResponder];

}

#pragma mark -

-(void) viewDidLoad

{

    [superviewDidLoad];

    NSArray *array=[[NSArrayalloc]initWithObjects:@"Name",@"From",@"To",@"Party",nil];

   self.filedLabels=array;

    UIBarButtonItem *cancelButton=[[UIBarButtonItemalloc]initWithTitle:@"Cancel"style:UIBarButtonItemStylePlaintarget:selfaction:@selector(cancel:)];

    self.navigationItem.leftBarButtonItem =cancelButton;

    

    UIBarButtonItem *saveButton=[[UIBarButtonItemalloc]initWithTitle:@"Save"style:UIBarButtonItemStyleDonetarget:selfaction:@selector(save:)];

    self.navigationItem.rightBarButtonItem=saveButton;

    

    NSMutableDictionary *dict =[[NSMutableDictionaryalloc]init];

   self.tempValues=dict;

}

#pragma mark -

#pragma mark Table Data Source Methods

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    returnkNumberOfEditableRows;

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

   staticNSString *PresidentCellIdentifier=@"PresidentCellIdentifier";

   UITableViewCell *cell= [tableViewdequeueReusableCellWithIdentifier:PresidentCellIdentifier];

   if (cell ==nil) {

        cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:PresidentCellIdentifier];

        //创建一个单元的时候会创建一个标签，然后创建一个文本字段

       UILabel *label= [[UILabelalloc]initWithFrame:CGRectMake(10,10,75,25)];

        label.textAlignment=UITextAlignmentRight;

        label.tag=kLabelTag;

        label.font=[UIFontboldSystemFontOfSize:14];

        [cell.contentViewaddSubview:label];

       UITextField *textField=[[UITextFieldalloc]initWithFrame:CGRectMake(90,12,200,25)];

        textField.clearsOnBeginEditing=NO;

        [textFieldsetDelegate:self];

        textField.returnKeyType =UIReturnKeyDone;//键盘的返回键类型

        [textField addTarget:selfaction:@selector(textFieldDone:)forControlEvents:UIControlEventEditingDidEndOnExit];//调用Did End on Exit事件

        [cell.contentViewaddSubview:textField];

    }

    

   NSUInteger row =[indexPathrow];

   UILabel *label =(UILabel *) [cellviewWithTag:kLabelTag];

   UITextField *textField =nil;

   for(UIView *oneViewin cell.contentView.subviews)

    {

       if ([oneViewisMemberOfClass:[UITextFieldclass]]) {

            textField=(UITextField *)oneView;

        }

    }

    label.text=[filedLabelsobjectAtIndex:row];

   NSNumber *rowAsNum=[NSNumbernumberWithInt:row];

   switch (row) {

        casekNameRowIndex:

           if ([[tempValuesallKeys]containsObject:rowAsNum]) {

                textField.text=[tempValuesobjectForKey:rowAsNum];

            }

           else

                textField.text=president.name;

           break;

        casekFromYearRowIndex:

           if ([[tempValuesallKeys]containsObject:rowAsNum]) {

                textField.text=[tempValuesobjectForKey:rowAsNum];

            }

           else

                textField.text=president.fromYear;

           break;

        casekToYearRowIndex:

           if ([[tempValuesallKeys]containsObject:rowAsNum]) {

                textField.text=[tempValuesobjectForKey:rowAsNum];

            }

           else

                textField.text=president.toYear;

           break;

        casekPartyIndex:

           if ([[tempValuesallKeys]containsObject:rowAsNum]) {

                textField.text=[tempValuesobjectForKey:rowAsNum];

            }

           else

                textField.text=president.party;

           break;

            

       default:

           break;

    }

   if (currentTextFiled==textField) {

        currentTextFiled=nil;

    }

    textField.tag=row;

   return cell;

}

#pragma mark -

#pragma mark Table Delegate Methods

-(NSIndexPath *) tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    returnnil;//该方法将在行被选中时调用，并且允许禁止选中行。作用仅仅是不让行在选中之后呈突出显示

}

#pragma mark Text Filed Delegate Methods

-(void)textFieldDidBeginEditing:(UITextField *)textField

{

    self.currentTextFiled=textField;//当文本字段称为第一响应者时调用此方法。

}

-(void)textFieldDidEndEditing:(UITextField *)textField

{

    //当用户通过单击不同文本字段或者按下Done按钮来停止编辑当前文本字段时，调用该方法。将该字段的值保存在tempValues字段中。

   NSNumber *tagAsNum=[NSNumbernumberWithInt:textField.tag];

    [tempValuessetObject:textField.textforKey:tagAsNum];

}

@end

在FirstLevelController.m中条件

  //BIDPresident View/Edit

    BIDPresidentsViewController *presidentsViewController=[[BIDPresidentsViewControlleralloc]initWithStyle:UITableViewStylePlain];

    presidentsViewController.title=@"Detail Edit";

    presidentsViewController.rowImage=[UIImageimageNamed:@"detailEditIcon.png"];

    [arrayaddObject:presidentsViewController];