Question

我正在尝试导航到UITableView中的详细视图，并且在执行它时似乎遇到了一些问题。

我的代码：

ViewController.h

#import <UIKit/UIKit.h>
#import "SecondViewController.h"

@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>{
    NSArray *tableItems;
    NSArray *images;

}

@property (nonatomic,retain) NSArray *tableItems;
@property (nonatomic,retain) NSArray *images;

@end

ViewController.m

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>
#import "SecondViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize tableItems,images;
- (void)viewDidLoad
{
    [super viewDidLoad];
    tableItems = [[NSArray alloc] initWithObjects:@"Item1",@"Item2",@"Item3",nil];
    images = [[NSArray alloc] initWithObjects:[UIImage imageNamed:@"clock.png"],[UIImage imageNamed:@"eye.png"],[UIImage imageNamed:@"target.png"],nil];
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return tableItems.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    //Step 1:Check whether if we can reuse a cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

    //If there are no new cells to reuse,create a new one
    if(cell ==  nil)
    { 
        cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:@"cell"];
        UIView *v = [[UIView alloc] init];
        v.backgroundColor = [UIColor redColor];
        cell.selectedBackgroundView = v;
        //changing the radius of the corners
        //cell.layer.cornerRadius = 10;

    }

    //Set the image in the row
    cell.imageView.image = [images objectAtIndex:indexPath.row];

    //Step 3: Set the cell text content
    cell.textLabel.text = [tableItems objectAtIndex:indexPath.row];

    //Step 4: Return the row
    return cell;

}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
    cell.backgroundColor = [ UIColor greenColor];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    SecondViewController *detailViewController = [[SecondViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];

    [detailViewController printRowNumber:indexPath.row+1];

    //NSArray *dataItem = [self.tableItems objectAtIndex:[indexPath row]];

    //detailViewController.dataSource = dataItem;

    [self.navigationController pushViewController:detailViewController animated:YES];
    //[self presentViewController:detailViewController animated:YES completion:NULL];
}
@end

SecondViewController.h

#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController{
    IBOutlet UILabel *lbl;
}

-(void) printRowNumber:(int)num;

@end

SecondViewController.m

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

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

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

-(void) printRowNumber:(int)num{
    lbl.text = @"Hello";
    NSLog(@"%d",num);
}
@end

我能够在输出中打印出indexPath.row的值，但是无法显示SecondViewController的detailview。不确定是什么问题。需要一些指导...谢谢..

Answer 1

看看这个：

embed navigation controller

如果您想使用mainViewController方法，则需要将NavigationController嵌入pushViewController:。

如果您不想使用NavigationController，则可以使用presentViewController:方法加载detailViewController和dismissViewController:方法以返回mainViewController

无法导航到UITableView中的详细视图

1 个答案: