Question

嗨，我正在开发一个具有图像更新功能的iOS。要使用NSURLConnectionDelegate和setDatasource在tableview和php的帮助下将图片带到json，我正在尝试为此提供详细视图选项我的表视图在这方面很艰难，请帮助我。

setdatasource编码 imagecell.m

-(void)setDataSource:(image *)inImageObj
{
     self.decriptionLabel.text = inImageObj.desp;
     NSURL *url = [NSURL URLWithString:inImageObj.img];
     NSURLRequest *request = [NSURLRequest requestWithURL:url];
     connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
     self.responseData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
{
    [self.responseData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection;
{
    UIImage *image = [UIImage imageWithData:self.responseData];
    self.thumbImageView.image = image;
}

这是我用来查看表格 view.m

中的图片的代码

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath
{
    static NSString *cellIdentifier =@"Cell";

   imgpoliticalCell *cell =(imgpoliticalCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
   if (cell== nil) {

    cell = [[imgpoliticalCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
   }
   [cell setDataSource:[imgevery objectAtIndex:indexPath.row]];
   return cell;
}

现在我想查看detailviewcontroller中的图片和说明。我尝试使用segue我无法正常使用

detailviewcontroller.h 文件

@interface DetailpoliticalViewController : UIViewController

    @property (strong,nonatomic) UIImage * image;
    @property (strong,nonatomic) NSString * data;

    @property (strong, nonatomic) IBOutlet UIImageView *imageview;

    @property (strong, nonatomic) IBOutlet UILabel *view;

这是我在 detailviewcontroller.m 文件中使用的代码

@implementation DetailpoliticalViewController
@synthesize imageview,view;
@synthesize image,data;

 - (void)viewDidLoad
 {
     [super viewDidLoad];

     self.imageview.image = self.image;
     self.view.text= self.data;
 // Do any additional setup after loading the view.
 }

这是我在表视图控制器中使用的push segue代码

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
     if ([segue.identifier isEqualToString:@"Detailsegue"]) {

    DetailpoliticalViewController *detailvc =(DetailpoliticalViewController *)segue.destinationViewController;
    NSIndexPath *indexPath =[self.mytableview indexPathForCell:(UITableViewCell *) sender];
    image * eve = [imgevery objectAtIndex:indexPath.row];
    [detailvc setDataSource:[imgevery objectAtIndex:indexPath.row]];
}

现在我无法在详细视图控制器中查看图像和描述我收到了nil异常错误

请任何人建议某种方式查看详细信息

提前致谢

Answer 1

使用

 NSIndexPath *indexPath =[self.mytableview indexPathForSelectedRow];

而不是

 NSIndexPath *indexPath =[self.mytableview indexPathForCell:(UITableViewCell *) sender];

Answer 2

您可以通过实施以下两种方法来实现这一目标：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [self performSegueWithIdentifier:@"Detailsegue" sender:indexPath];
}

及以下方法

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"Detailsegue"]) {
        DetailpoliticalViewController *detailvc =(DetailpoliticalViewController *)segue.destinationViewController;
        NSIndexPath *indexPath = (NSIndexPath *)sender;
        image * eve = [imgevery objectAtIndex:indexPath.row];
        [detailvc setDataSource:[imgevery objectAtIndex:indexPath.row]];
    }
}

Answer 3

检查一下：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{    
    [self performSegueWithIdentifier: @"DetailSegue" sender: self];        

}

 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"DetailSegue"]) {
    DetailpoliticalViewController *detailvc =(DetailpoliticalViewController *)segue.destinationViewController;


    indexPath = [self.tableView indexPathForSelectedRow];
    image * eve = [imgevery objectAtIndex:indexPath.row];
    [detailvc setDataSource:[imgevery objectAtIndex:indexPath.row]];

    }
}

查看本教程LINK 1

如何在tableview中查看detailview控制器中的图像？

3 个答案: