在选择表格单元格“didSelect”时如何将图像解析到另一个视图？

Posted 2023-02-23

【中文标题】在选择表格单元格“didSelect”时如何将图像解析到另一个视图？

【英文标题】：On selecting the table cell "didSelect" how to parse images to another View?

【发布时间】：2014-09-18 10:05:03

【问题描述】：

我正在从 Web 服务获得伙伴响应并在我的应用程序中使用 AFNetworking

"CityMap_Image":
 "
 ImagePath1":"alm.demo11.com\/admin\/AlMithaqImages\/24378070-98a4-4d05-9306-d17b0c6c58c9.jpg",
"ImagePath2":"alm.demo11.com\/admin\/AlMithaqImages\/ad9f24f9-ca58-4c73-8289-161b5d5bd16d.jpg"

主视图中的表格配置

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

CityDetailViewController * cityMap = [[CityDetailViewController alloc]initWithNibName:@"CityDetailViewController" bundle:nil];

if (tableView == stage3menuTableView) 

    if (indexPath.row == 0) 


        [self.navigationController pushViewController:cityMap animated:NO];
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
            [manager GET:@"http://alm.demo11.com/API.svc/get_CityMap" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) 

                self.nDic = (NSDictionary *)responseObject;
                NSMutableDictionary *nDic1 = [[NSMutableDictionary alloc]initWithDictionary:[self.nDic objectForKey:@"CityMap_Image"]];
                NSString *img = [NSString stringWithFormat:@"http://%@",[nDic1 objectForKey:@"ImagePath1"]];
                NSURL *url = [NSURL URLWithString:img];
                NSData *data = [NSData dataWithContentsOfURL:url];

                cityMap.passedImage = [UIImage imageWithData:data];
                NSLog(@"response dateJSON: %@", cityMap.passedImage);


             failure:^(AFHTTPRequestOperation *operation, NSError *error) 
                UIAlertView *erroralert = [[UIAlertView alloc] initWithTitle:@"Message" message:@"Sorry, Server is not responding. Please try later" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                [erroralert show];

            ];



    


    else if (indexPath.row == 1)
    

        [self.navigationController pushViewController:cityMap animated:NO];
        cityMap.passedImage = [UIImage imageNamed:@"morebg.png"];


    else
    

        [self.navigationController pushViewController:cityMap animated:NO];
        cityMap.passedImage = [UIImage imageNamed:@"morebg.png"];

    
    [tableView deselectRowAtIndexPath:indexPath animated:YES];

第二视图

.h

@interface DetailViewController : UIViewController<UIScrollViewDelegate>

IBOutlet UIImageView *bandImage;


@property (strong, nonatomic) UIImageView *bandImage;
@property (strong, nonatomic) IBOutlet UIScrollView *scrollView;
 @property (nonatomic, strong) UIImage *passedImage;

 @end

.m

-(Void)ViewDidLoad

     bandImage.image = self.passedImage;

     

对于静态图像，它工作正常，但对于网络服务，它不工作.. 谁能说出我到底哪里出错了？

【问题讨论】：

只是一个建议，在第二个控件中发出请求，而不是使用加载活动

【参考方案1】：

将您的方法更新为：

 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

    CityDetailViewController * cityMap = [[CityDetailViewController alloc]initWithNibName:@"CityDetailViewController" bundle:nil];

if (tableView == stage3menuTableView) 

       if (indexPath.row == 0) 



    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
        [manager GET:@"http://alm.demo11.com/API.svc/get_CityMap" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) 

            self.nDic = (NSDictionary *)responseObject;
            NSMutableDictionary *nDic1 = [[NSMutableDictionary alloc]initWithDictionary:[self.nDic objectForKey:@"CityMap_Image"]];
            NSString *img = [NSString stringWithFormat:@"http://%@",[nDic1 objectForKey:@"ImagePath1"]];
            NSURL *url = [NSURL URLWithString:img];
            NSData *data = [NSData dataWithContentsOfURL:url];

            cityMap.passedImage = [UIImage imageWithData:data];
            [self.navigationController pushViewController:cityMap animated:NO];
            NSLog(@"response dateJSON: %@", cityMap.passedImage);


         failure:^(AFHTTPRequestOperation *operation, NSError *error) 
            UIAlertView *erroralert = [[UIAlertView alloc] initWithTitle:@"Message" message:@"Sorry, Server is not responding. Please try later" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [erroralert show];

        ];






else if (indexPath.row == 1)



    cityMap.passedImage = [UIImage imageNamed:@"morebg.png"];
    [self.navigationController pushViewController:cityMap animated:NO];


else



    cityMap.passedImage = [UIImage imageNamed:@"morebg.png"];
    [self.navigationController pushViewController:cityMap animated:NO];


[tableView deselectRowAtIndexPath:indexPath animated:YES];

【讨论】：

感谢您的快速响应 :-) 它工作正常 .. 万岁 ..！

在 secondview.m 中应用断点并查看是否能够在第二个视图中获取该图像。检查passedImage 不应该为nil。