Question

我遇到了在目标C中推送到新的TableView的问题。现在我把它带到第一个表中它出现动物列表的位置，你按动物，例如“狗”，它然后推送到新视图并显示阵列中的狗列表。我想能够选择一只特定的狗，它会说出关于那只特定狗的“规格”......我试图对我到目前为止所做的工作进行一些逆向工程，但我没有成功。

现在我有Main.storyboard，RootTableViewController和SecondTableViewController ......

我觉得我需要添加一个ThirdTableViewController来添加我的下一个TableView，它将列出所选狗的规格，但这是我需要添加的唯一类吗？

RootTableViewController.m

#import "RootTableViewController.h"
#import "SecondTableViewController.h"

@interface RootTableViewController ()

@end

@implementation RootTableViewController
{
NSArray *animals;

}

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

animals = [NSArray arrayWithObjects:@"Dogs", @"Cats", @"Frogs", @"Gnats", nil];

// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;

// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [animals count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//makes table indentifier
static NSString *simpleTableIdentifier = @"AnimalCell";

//creates the cell
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier  forIndexPath:indexPath];

if(cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:simpleTableIdentifier];
}

cell.textLabel.text = [animals objectAtIndex:indexPath.row];
return cell;
}

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before  navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:@"showArrayDetail"])
{
    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
    SecondTableViewController *destViewController = segue.destinationViewController;
    destViewController.animalName = [animals objectAtIndex:indexPath.row];
    destViewController.title = destViewController.animalName;

}
}

@end

RootTableViewController.h

#import <UIKit/UIKit.h>

@interface RootTableViewController : UITableViewController

@end

SecondTableViewController.m

#import "RootTableViewController.h"
#import "SecondTableViewController.h"

@interface RootTableViewController ()

@end

@implementation RootTableViewController
{
NSArray *animals;

}

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

animals = [NSArray arrayWithObjects:@"Dogs", @"Cats", @"Frogs", @"Gnats", nil];

// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;

// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [animals count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//makes table indentifier
static NSString *simpleTableIdentifier = @"AnimalCell";

//creates the cell
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier  forIndexPath:indexPath];

if(cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:simpleTableIdentifier];
}

cell.textLabel.text = [animals objectAtIndex:indexPath.row];
return cell;
}

SecondTableViewController.h

#import <UIKit/UIKit.h>

@interface SecondTableViewController : UITableViewController

@property(nonatomic, strong) NSString *animalName;
@property (nonatomic) NSInteger *selectedIndex;

-(void)SelectedMasterItem:(NSInteger *)selected;

@end

ThirdTableViewController.m

#import "ThirdTableViewController.h"

@interface ThirdTableViewController ()

@end

@implementation ThirdTableViewController
{
NSArray *dogSpecs;
NSArray *catSpecs;
NSArray *frogSpecs;
NSArray *gnatSpecs;
}

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

dogSpecs = [NSArray arrayWithObjects:@"Yellow", @"Black", @"Mean", @"Fast", @"Ugly", nil];
catSpecs = [NSArray arrayWithObjects:@"Smells", @"Hairy", @"Biter", @"Long", nil];
frogSpecs = [NSArray arrayWithObjects:@"Green", @"Yellow", @"Red", nil];
gnatSpecs = [NSArray arrayWithObjects:@"Crash", @"Annoying", @"Sad", nil];

// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;

// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if([_animalSpec isEqualToString:@"Dogs"])
{
    return [dogSpecs count];
}

else if([_animalSpec isEqualToString:@"Cats"])
{
    return [catSpecs count];
}

else if([_animalSpec isEqualToString:@"Frogs"])
{
    return [frogSpecs count];
}

else if([_animalSpec isEqualToString:@"Gnats"])
{
    return [gnatSpecs count];
}

return 0;

}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//makes table indentifier
static NSString *simpleTableIdentifier = @"Animal3Cell";

//creates the cell
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

if(cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:simpleTableIdentifier];
}

if([_animalSpec isEqualToString:@"Dogs"])
{
    cell.textLabel.text = [dogSpecs objectAtIndex:indexPath.row];
}

else if([_animalSpec isEqualToString:@"Cats"])
{
    cell.textLabel.text = [catSpecs objectAtIndex:indexPath.row];
}

else if([_animalSpec isEqualToString:@"Frogs"])
{
    cell.textLabel.text = [frogSpecs objectAtIndex:indexPath.row];
}

else if([_animalSpec isEqualToString:@"Gnats"])
{
    cell.textLabel.text = [gnatSpecs objectAtIndex:indexPath.row];
}

return cell;
}
@end

ThirdTableViewController.h

#import <UIKit/UIKit.h>

@interface ThirdTableViewController : UITableViewController

@property(nonatomic, strong) NSString *animalSpec;

@end

我很抱歉所有的代码，我只是想发布所有代码，所以也许有人能理解我在说什么。我确信这是一个初学者的事情，我只是不理解，如果是这样，抱歉我的无知。

由于

Answer 1

> In first ViewController

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    SecondTableViewController *secondViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"SecondStoryBoardIdentifier"];
     secondViewController.selectedIndex =indexPath.row;
    [self.navigationController pushViewController:secondViewController animated:YES];
}


> In Second ViewController

in .h file

@interface SecondTableViewController : UITableViewController

@property (nonatomic) NSInteger *selectedIndex;
-(void)SelectedMasterItem:(NSInteger *)selected;
@end

In .m file

@implementation SecondTableViewController
{
NSArray *dogs;
NSArray *cats;
NSArray *frogs;
NSArray *gnats;
NSMutableArray *arrayItems;
}


- (void)viewDidLoad
{
    [super viewDidLoad];
arrayItems = [[NSMutableArray alloc]init];

dogSpecs = [NSArray arrayWithObjects:@"Yellow", @"Black", @"Mean", @"Fast", @"Ugly", nil];
catSpecs = [NSArray arrayWithObjects:@"Smells", @"Hairy", @"Biter", @"Long", nil];
frogSpecs = [NSArray arrayWithObjects:@"Green", @"Yellow", @"Red", nil];
gnatSpecs = [NSArray arrayWithObjects:@"Crash", @"Annoying", @"Sad", nil];

[self SelectedMasterItem:self.selectedIndex];

}

-(void)SelectedMasterItem:(NSInteger *)selected
{
    [arrayItems removeAllObjects];
    switch (selected) {

        case 0:
            arrayItems = [dogSpecs mutableCopy];
            break;

        case 1:
            arrayItems = [catSpecs mutableCopy];
            break;
        case 2:
            arrayItems = [frogSpecs mutableCopy];
            break;
         case 3:
            arrayItems = [gnatSpecs mutableCopy];
            break;
        default:
            break;
    }
    [self.tableView reloadData];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return arrayItems.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//makes table indentifier
static NSString *simpleTableIdentifier = @"Animal3Cell";

//creates the cell
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

   if(!cell)
  {
     cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault)reuseIdentifier:simpleTableIdentifier];
  }
cell.textLabel.text =arrayItems[indexPath.row];
return cell;
}

推向新的TableView

1 个答案: