Creating a UITableView Programmatically

Question

I have an application in Xcode 4 6 which uses storyboards  I added a UITableView to a view controller class  which worked as expected  However  when I tried deleting the UITableView in the storyboard and adding it back into the same class programmatically  I ran into two specific problems   1  Although I set the UITableViewCell type to be of type subtitle  the detail label no longer appears   2  The segue that should occur when I select a cell does not occur  and prepare segue is not even being called  indicating that no message is being sent to the table view when a cell is selected    Here is the relevant code    interface StatsTableViewController     lt UITableViewDataSource  UITableViewDelegate gt   property  strong  nonatomic  UITableView  tableView    end   implementation StatsTableViewController  - UITableView   makeTableView       CGFloat x   0      CGFloat y   50      CGFloat width   self view frame size width      CGFloat height   self view frame size height - 50      CGRect tableFrame   CGRectMake x  y  width  height        UITableView  tableView     UITableView alloc initWithFrame tableFrame style UITableViewStylePlain        tableView rowHeight   45      tableView sectionFooterHeight   22      tableView sectionHeaderHeight   22      tableView scrollEnabled   YES      tableView showsVerticalScrollIndicator   YES      tableView userInteractionEnabled   YES      tableView bounces   YES       tableView delegate   self      tableView dataSource   self       return tableView     -  void viewDidLoad        super viewDidLoad       self tableView    self makeTableView        self tableView registerClass  UITableViewCell class  forCellReuseIdentifier   newFriendCell         self view addSubview self tableView      -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  CellIdentifier     newFriendCell       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier CellIdentifier forIndexPath indexPath        if  cell    nil                 cell     UITableViewCell alloc initWithStyle UITableViewCellStyleSubtitle reuseIdentifier CellIdentifier              Friend  friend    self fetchedResultsController objectAtIndexPath indexPath             THIS DATA APPEARS       cell textLabel text   friend name      cell textLabel font    cell textLabel font fontWithSize 20       cell imageView image    UIImage imageNamed   icon57x57             THIS DATA DOES NOT APPEAR       cell detailTextLabel text    NSString stringWithFormat    i Games   friend gameCount       cell detailTextLabel textColor    UIColor lightGrayColor        return cell      - void tableView  UITableView   tableView didDeselectRowAtIndexPath  NSIndexPath   indexPath        self performSegueWithIdentifier   detailsView  sender self      -  void prepareForSegue  UIStoryboardSegue   segue sender  id sender           I set the segue identifier in the interface builder      if   segue identifier isEqualToString   detailsView                     NSLog   segue      check to see if method is called  it is NOT called upon cell touch           NSIndexPath  indexPath    self tableView indexPathForCell sender               more code to prepare next view controller                I am not sure what I am forgetting to do so that I can solve these two issues  Any help is appreciated

User · Answer

You might be do that  its  works 100     -  void viewDidLoad        super viewDidLoad          init table view     tableView     UITableView alloc  initWithFrame self view bounds style UITableViewStylePlain           must set delegate  amp  dataSource  otherwise the the table will be empty and not responsive     tableView delegate   self      tableView dataSource   self       tableView backgroundColor    UIColor cyanColor           add to canvas      self view addSubview tableView       pragma mark - UITableViewDataSource    number of section s   now I assume there is only 1 section -  NSInteger numberOfSectionsInTableView  UITableView   theTableView       return 1        number of row in the section  I assume there is only 1 row -  NSInteger tableView  UITableView   theTableView numberOfRowsInSection  NSInteger section       return 1        the cell will be returned to the tableView -  UITableViewCell   tableView  UITableView   theTableView cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  cellIdentifier     HistoryCell           Similar to UITableViewCell  but      JSCustomCell  cell    JSCustomCell    theTableView dequeueReusableCellWithIdentifier cellIdentifier       if  cell    nil            cell     JSCustomCell alloc  initWithStyle UITableViewCellStyleDefault reuseIdentifier cellIdentifier                Just want to test  so I hardcode the data     cell descriptionLabel text     Testing        return cell      pragma mark - UITableViewDelegate    when user tap the row  what action you want to perform -  void tableView  UITableView   theTableView didSelectRowAtIndexPath  NSIndexPath   indexPath       NSLog   selected  d row   indexPath row       end

User · Answer

vc m   import  ViewController h    import  secondViewController h     interface ViewController        NSArray  cityArray  NSArray  citySubTitleArray  NSArray  cityImage  NSInteger selectindexpath      end    implementation ViewController   -  void viewDidLoad    super viewDidLoad      Do any additional setup after loading the view  typically from a nib   cityArray     NSArray  alloc initWithObjects   Coimbatore    Salem    Chennai  nil    citySubTitleArray     NSArray alloc initWithObjects   1    2    3   nil   cityImage     NSArray alloc initWithObjects   12-300x272 png       380267 70d232fc33b44d4ebe7b42bbe63ee9be png    apple-logo 318  -40184 png   nil           pragma mark - UITableView Data Source   -  NSInteger numberOfSectionsInTableView  UITableView   tableView    return 1        -  NSInteger  tableView  UITableView   tableView numberOfRowsInSection     NSInteger section     return cityImage count      -  UITableViewCell   tableView  UITableView   tableView  cellForRowAtIndexPath  NSIndexPath   indexPath   static NSString  cellId     city    UITableViewCell  cell     tableView dequeueReusableCellWithIdentifier cellId    if  cell    nil        cell     UITableViewCell    alloc initWithStyle UITableViewCellStyleSubtitle reuseIdentifier cellId      cell textLabel text    cityArray objectAtIndex indexPath row   cell detailTextLabel text    citySubTitleArray objectAtIndex indexPath row   cell imageView image    UIImage imageNamed    cityImage objectAtIndex indexPath row               NSData  data     NSData alloc initWithContentsOfURL    NSURL URLWithString                cell imageView image    UIImage imageWithData data    return cell     - void tableView  UITableView   tableView didSelectRowAtIndexPath     NSIndexPath   indexPath     NSLog   ----      cityArray objectAtIndex indexPath row     NSLog   -----      cityImage objectAtIndex indexPath row     selectindexpath indexPath row    self performSegueWithIdentifier   second  sender self           pragma mark - Navigation      In a storyboard-based application  you will often want to do a little p  -  void prepareForSegue  UIStoryboardSegue   segue sender  id sender           Get the new view controller using  segue destinationViewController       Pass the selected object to the new view controller   if   segue identifier isEqualToString   second           secondViewController  object segue destinationViewController      object cityName  cityArray objectAtIndex selectindexpath       object cityImage  cityImage objectAtIndex selectindexpath                 -  void didReceiveMemoryWarning    super didReceiveMemoryWarning      Dispose of any resources that can be recreated        end   vc m    import  lt UIKit UIKit h gt     interface ViewController   UIViewController lt UITableViewDataSource     UITableViewDelegate gt    property  strong  nonatomic  IBOutlet UITableView  cityLabelList    end   sv m    import  lt UIKit UIKit h gt    interface secondViewController   UIViewController  property strong  nonatomic  NSString  cityName    property strong nonatomic NSString  cityImage   end   sv h   import  secondViewController h     interface secondViewController       property  strong  nonatomic  IBOutlet UILabel  lbl desc    property  strong  nonatomic  IBOutlet UIImageView  img city       end    implementation secondViewController   -  void viewDidLoad     super viewDidLoad      Do any additional setup after loading the view  self title self cityName    if   self cityName isEqualToString   Coimbatore            self lbl desc text   Coimbatore city       self img city image  UIImage imageNamed       NSString stringWithFormat       self cityImage       else if   self cityName isEqualToString   Chennai            self lbl desc text    Chennai City Gangstar       self img city image  UIImage imageNamed      NSString stringWithFormat       self cityImage            else            self lbl desc text    selam City       self img city image  UIImage imageNamed      NSString stringWithFormat       self cityImage              -  void didReceiveMemoryWarning    super didReceiveMemoryWarning      Dispose of any resources that can be recreated

User · Answer

Creating a tableview using tableViewController    import UIKit  class TableViewController  UITableViewController       let tableViewModel   TableViewModel       var product   String           var price   String           override func viewDidLoad                 super viewDidLoad           self tableView contentInset   UIEdgeInsetsMake  20  20   0  0          let priceProductDetails   tableViewModel dataProvider            for  key  value  in priceProductDetails                       product append key              price append value                       override func tableView tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int               return product count            override func tableView tableView  UITableView  cellForRowAtIndexPath indexPath  NSIndexPath  - gt  UITableViewCell               let cell   UITableViewCell style   Value1  reuseIdentifier   UITableViewCell           cell textLabel  text   product indexPath row          cell detailTextLabel  text   price indexPath row          return cell            override func tableView tableView  UITableView  didSelectRowAtIndexPath indexPath  NSIndexPath                print  You tapped cell number   indexPath row

User · Answer

-  NSInteger tableView  UITableView   theTableView numberOfRowsInSection  NSInteger section       return 1     -  UITableViewCell   tableView  UITableView   theTableView  cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  cellIdentifier     HistoryCell        UITableViewCell  cell    UITableViewCell    theTableView dequeueReusableCellWithIdentifier cellIdentifier       if  cell    nil                cell     UITableViewCell alloc  initWithStyle UITableViewCellStyleDefault reuseIdentifier cellIdentifier             cell descriptionLabel text     Testing       return cell     -  void tableView  UITableView   tableView didSelectRowAtIndexPath  NSIndexPath   indexPath         Code for selection      these are UITableView delegate methods

User · Answer

import  ViewController h    interface ViewController            NSMutableArray  name       end   -  void viewDidLoad           super viewDidLoad       name   NSMutableArray alloc init        name addObject   ronak         name addObject   vibha         name addObject   shivani         name addObject   nidhi         name addObject   firdosh         name addObject   himani          tableview outlet delegate   self       tableview outlet dataSource   self       -  NSInteger tableView  UITableView   tableView numberOfRowsInSection  NSInteger section     return  name count        -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath         static NSString  simpleTableIdentifier     cell        UITableViewCell  cell    tableView       dequeueReusableCellWithIdentifier simpleTableIdentifier        if  cell    nil            cell     UITableViewCell alloc  initWithStyle UITableViewCellStyleDefault reuseIdentifier simpleTableIdentifier              cell textLabel text    name objectAtIndex indexPath row       return cell

User · Answer

-  void viewDidLoad        super viewDidLoad       tableView     UITableView alloc  initWithFrame self view bounds style UITableViewStylePlain       tableView delegate   self      tableView dataSource   self       tableView backgroundColor    UIColor grayColor           add to superview      self view addSubview tableView       pragma mark - UITableViewDataSource -  NSInteger numberOfSectionsInTableView  UITableView   theTableView       return 1     -  NSInteger tableView  UITableView   theTableView numberOfRowsInSection      NSInteger section       return 1        the cell will be returned to the tableView -  UITableViewCell   tableView  UITableView   theTableView  cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  cellIdentifier     HistoryCell           Similar to UITableViewCell  but      UITableViewCell  cell    UITableViewCell    theTableView dequeueReusableCellWithIdentifier cellIdentifier       if  cell    nil                cell     UITableViewCell alloc  initWithStyle UITableViewCellStyleDefault reuseIdentifier cellIdentifier             cell descriptionLabel text     Testing       return cell

User · Answer

sample table    import  StartreserveViewController h    import  CollectionViewController h    import  TableViewCell1 h   interface StartreserveViewController        NSArray  name  NSArray  images  NSInteger selectindex       end   implementation StartreserveViewController  -  void viewDidLoad    super viewDidLoad      Do any additional setup after loading the view   self view backgroundColor    UIColor blueColor    startReservetable backgroundColor    UIColor blueColor     name     NSArray alloc initWithObjects   Mobiles    Costumes    Shoes    nil   images     NSArray   alloc initWithObjects   mobilestitle jpg    costumetitle jpeg       shoestitle png  nil            -  void didReceiveMemoryWarning    super didReceiveMemoryWarning      Dispose of any resources that can be recreated      pragma mark - UiTableview Datasource   - NSInteger numberOfSectionsInTableView  UITableView   tableView    return 1       - NSInteger tableView  UITableView   tableView numberOfRowsInSection    NSInteger section    return 3       -  UITableViewCell   tableView  UITableView   tableView    cellForRowAtIndexPath  NSIndexPath   indexPath      static NSString  cellId     tableview    TableViewCell1   cell   tableView dequeueReusableCellWithIdentifier cellId     cell cellTxt  text    name objectAtIndex indexPath row    cell cellImg image    UIImage imageNamed  images  objectAtIndex indexPath row     return cell          - void tableView  UITableView   tableView didSelectRowAtIndexPath   NSIndexPath   indexPath    selectindex   indexPath row   self performSegueWithIdentifier   second  sender self            pragma mark - Navigation      In a storyboard-based application  you will often want to do a little      -  void prepareForSegue  UIStoryboardSegue   segue sender  id sender    if   segue identifier isEqualToString   second             CollectionViewController  obj   segue destinationViewController             obj receivename    name objectAtIndex selectindex              Get the new view controller using  segue destinationViewController      Pass the selected object to the new view controller       end    h   import  lt UIKit UIKit h gt    interface StartreserveViewController         UIViewController lt UITableViewDelegate UITableViewDataSource gt       property  strong  nonatomic  IBOutlet UITableView  startReservetable     end

User · Answer

When you register a class  and use dequeueReusableCellWithIdentifier forIndexPath   the dequeue method is guaranteed to return a cell  so your if  cell    nil  clause is never entered  So  just do it the old way  don t register the class  and use dequeueReusableCellWithIdentifier   -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       static NSString  CellIdentifier     newFriendCell       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier CellIdentifier        if  cell    nil            cell     UITableViewCell alloc initWithStyle UITableViewCellStyleSubtitle reuseIdentifier CellIdentifier           etc  return cell      As for the segue  it can t be called because you can t make a segue to a table that you ve created in code  not in IB  Again  go back to the old way and use tableView didSelectRowAtIndexPath  which will be called when you select a cell  Instantiate your detail controller there and do the trasition in code   After edit   I didn t see your added code there  You ve implemented didDeselectRowAtIndexPath rather than didSelectRowAtIndexPath  If you change that  your segue should work

User · Answer

-  void viewDidLoad         super viewDidLoad        arr   NSArray alloc initWithObjects   ABC    XYZ   nil        tableview     UITableView alloc initWithFrame tableFrame style UITableViewStylePlain           tableview delegate   self       tableview dataSource   self        self view addSubview tableview      -  NSInteger tableView  UITableView   tableView numberOfRowsInSection  NSInteger section       return arr count     -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier   MyCell         if cell    nil                cell     UITableViewCell alloc initWithStyle UITableViewCellStyleDefault reuseIdentifier   MyCell               cell textLabel text  arr objectAtIndex indexPath row        return cell

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