iOS 应用程序 - 在 GridView 中显示来自 JSON URL 列表的图像。

Question

我将 URL 列表存储在 MYSQL 数据库表中，并且我已经能够通过 JSON 成功检索 URL。

但是，既然我有了 JSON，我不确定如何在我的 iPhone 应用程序的图库类型 View 中显示图像。

我计划拥有一个巨大的 URL 列表，用于在数据库中显示图像，我想一次显示 x 个数量，然后一旦用户滚动到末尾，我想再显示 x 个数量。像品脱店一样。

有什么提示吗？

#import "mySQLAppViewController.h"


@interface mySQLAppViewController (){

}

- (IBAction)loadJSON:(id)sender;

@end


@implementation mySQLAppViewController

- (IBAction)loadJSON:(id)sender {

    NSString *dataUrl = [NSString stringWithFormat:@"http://MYDOMAIN.com/results.php"];
    NSURL *url = [NSURL URLWithString:dataUrl];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    AFJSONRequestOperation *operation =
    [AFJSONRequestOperation JSONRequestOperationWithRequest:request
            success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

               for (int i =0 ; i < [JSON count]; i++) {

                   //NSString *image_url = JSON[i][@"image_url"];
                   //NSLog(@"%@", image_url);
                   //^^THIS SUCESSFULLY LOGS THE URL LINKS (I.E. HTTP://MYDOMAIN.COM/CAR.JPG)

                   NSURL *imageURL = [NSURL URLWithString:JSON[i][@"image_url"]];
                   NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
                   UIImage *image = [UIImage imageWithData:imageData];
                   UIImageView *imageView = [[UIImageView alloc] initWithImage:image];


               }

            }

            failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
                UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Error Retrieving Weather"
                                                             message:[NSString stringWithFormat:@"%@",error]
                                                            delegate:nil
                                                   cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [av show];
            }];

    [operation start];

}

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

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

@end

Answer 1

听起来你想看看 UICollectionView。这是一个帮助您入门的教程: Beginning UICollectionView In iOS 6 .