Ios 以编程方式创建UITableView

Ios 以编程方式创建UITableView,ios,objective-c,xcode,uitableview,Ios,Objective C,Xcode,Uitableview,我在Xcode 4.6中有一个使用故事板的应用程序。我向视图控制器类添加了一个UITableView,该类按预期工作。但是,当我尝试删除情节提要中的UITableView并以编程方式将其添加回同一个类时,我遇到了两个特定的问题: 1)虽然我将UITableViewCell类型设置为subtitle类型,但细节标签不再显示。 2)当我选择一个单元格时应该出现的segue没有出现,而且prepare segue甚至没有被调用,这表明在选择一个单元格时没有消息发送到表视图。 以下是相关代码: @int

我在Xcode 4.6中有一个使用故事板的应用程序。我向视图控制器类添加了一个UITableView,该类按预期工作。但是,当我尝试删除情节提要中的UITableView并以编程方式将其添加回同一个类时,我遇到了两个特定的问题:

1)虽然我将UITableViewCell类型设置为subtitle类型,但细节标签不再显示。

2)当我选择一个单元格时应该出现的segue没有出现,而且prepare segue甚至没有被调用,这表明在选择一个单元格时没有消息发送到表视图。

以下是相关代码:

@interface StatsTableViewController () <UITableViewDataSource, UITableViewDelegate>
@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....
     }
}
@接口StatsTableViewController()
@属性(强,非原子)UITableView*tableView;
@结束
@StatsTableViewController的实现
-(UITableView*)makeTableView
{
cgx=0;
cGy=50;
CGFloat宽度=self.view.frame.size.width;
CGFloat高度=self.view.frame.size.height-50;
CGRect tableFrame=CGRectMake(x,y,宽度,高度);
UITableView*tableView=[[UITableView alloc]initWithFrame:tableFrame样式:UITableViewStylePlain];
tableView.rowHeight=45;
tableView.sectionFooterHeight=22;
tableView.sectionHeaderHeight=22;
tableView.scrollEnabled=是;
tableView.showsVerticalScrollIndicator=是;
tableView.userInteractionEnabled=是;
tableView.bounces=是;
tableView.delegate=self;
tableView.dataSource=self;
返回表视图;
}
-(无效)viewDidLoad
{
[超级视图下载];
self.tableView=[self-makeTableView];
[self.tableView注册表类:[UITableViewCell类]强制重用标识符:@“newFriendCell”];
[self.view addSubview:self.tableView];
}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
静态NSString*CellIdentifier=@“newFriendCell”;
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
如果(单元格==nil)
{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle重用标识符:CellIdentifier];
}
Friend*Friend=[self.fetchedResultsController对象索引路径:indexPath];
**//显示此数据**
cell.textlab.text=friend.name;
cell.textLabel.font=[cell.textLabel.fontWithSize:20];
cell.imageView.image=[UIImage ImageName:@“icon57x57”];
**//此数据不显示**
cell.detailTextLabel.text=[NSString stringWithFormat:@“%i Games”,friend.gameCount];
cell.detailTextLabel.textColor=[UIColor lightGrayColor];
返回单元;
}
-(void)tableView:(UITableView*)tableView未取消行索引路径:(NSIndexPath*)索引路径
{
[self-PerformsgueWithIdentifier:@“detailsView”发件人:self];
}
-(void)prepareForSegue:(UIStoryboardSegue*)segue发送方:(id)发送方
{
//我在界面生成器中设置了segue标识符
if([segue.identifier IsequalString:@“detailsView”])
{
NSLog(@“segue”);//检查是否调用了方法,在单元触摸时不会调用该方法
nsindepath*indepath=[self.tableView indexPathForCell:sender];
///准备下一个视图控制器的更多代码。。。。
}
}

为了解决这两个问题,我不确定我忘记了做什么。非常感谢您的帮助。

当您注册一个类并使用dequeueReusableCellWithIdentifier:forIndexPath:,dequeue方法保证返回一个单元格,因此永远不会输入if(cell==nil)子句。因此,只需按旧方法执行,不注册类,并使用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;
}
至于segue,它不能被调用,因为您不能对您在代码中而不是在IB中创建的表进行segue。同样,请回到旧方法,使用tableView:DidSelectRowatineXpath:选择单元格时将调用它。在那里实例化您的细节控制器,并在代码中进行转换

编辑后:


我没有看到你添加的代码。您已经实现了DidDeceloseRowatineXpath,而不是DidSelectRowatineXpath。如果你改变这一点,你的segue应该可以工作。

你可能会这样做,它的工作100%

- (void)viewDidLoad
{
    [super viewDidLoad];
    // init table view
    tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];

    // must set delegate & 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

这些是UITableView委托方法。

使用tableViewController创建tableview

#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;
}
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) -> Int
    {
        return product.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> 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).")
    }
}
样本表

 #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标记-UiTableview数据源 h

#导入
@接口StartRetServeViewController:
UIViewController
@属性(强,非原子)IBUITableView*StartServeTable;
@结束
vc.m

导入“secondViewController.h” vc.m


尝试定义单元格的高度。行高不是单元格的高度吗?我把它设置为45,这应该是足够的空间了…哦,是的,那会有用的,我认为你定义了一个错误的方法,应该是didSelect,而不是didSelect。我认为你可以使用segue,如果它存在于你的故事板中,但你仍然需要实现
tableView:didSelectRowAtIndexPath:
,并以编程方式执行segue,这与目的背道而驰。@tapi,是的,我知道,我没有看到她的一些代码,我还以为OP试图直接从一个单元格生成序列。我只是尝试添加tableView:didSelectRowAtIndexPath:并在主体performsguewithidentifier中。。。但这是行不通的。我想我会试着在code@user1697845,它应该可以工作——你确定你在IB和代码中的segue名称相同吗?@user1697845,为什么当你在IB中有表视图时,你要删除它并在代码中重做它?只是好奇。最好每次都记得这和这里已经给出的7个答案有什么不同?当给出答案时,最好给出正确答案。
#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;
}
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) -> Int
    {
        return product.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> 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).")
    }
}
 #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.
}
 -(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
#import <UIKit/UIKit.h>

@interface StartreserveViewController :      
UIViewController<UITableViewDelegate,UITableViewDataSource>    
@property (strong, nonatomic) IBOutlet UITableView *startReservetable;

 @end
#import "ViewController.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
 #import <UIKit/UIKit.h>

 @interface ViewController : UIViewController<UITableViewDataSource
  , UITableViewDelegate>
 @property (strong, nonatomic) IBOutlet UITableView *cityLabelList;

@end
 #import <UIKit/UIKit.h>

@interface secondViewController : UIViewController
@property(strong, nonatomic) NSString *cityName;
 @property(strong,nonatomic)NSString *cityImage;
@end
#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.
}