PFImageView url 显示解析

Question

已经 1 周了，我仍然卡在 PFImageView 上。我重做了一切。从 UITableView 更改为 PFQueryTableView，然后尝试使用 UITableViewCell 显示图像，然后使用 PFTableViewCell 和在每种方法中只有可以显示的东西是标签。每次运行我的应用程序时，我都会因为这条线而崩溃（SIGABRT）：`

崩溃线

 cell.imagevieww.file= [object objectForKey:@"ImageURL"];
        [cell.imagevieww loadInBackground];

谁能帮我解决这个问题？非常感谢

TableViewController.h

#import <Parse/Parse.h>
#import "Customcell.h"
#import "DetailViewController.h"

@interface TableeViewController : PFQueryTableViewController {

    NSArray *colorsArray;

}
@property (strong, nonatomic) IBOutlet UITableView *colorsTable;




@end

TableViewController.m

    #import "TableeViewController.h"
    #import "TableViewCell.h"
    #import "DetailViewController.h"

    @interface TableeViewController ()

    @end

    @implementation TableeViewController
    @synthesize colorsTable;

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

    - (id)initWithCoder:(NSCoder *)aCoder
    {
        self = [super initWithCoder:aCoder];
        if (self) {
            // The className to query on
            self.parseClassName = @"Hracky1";

            // Whether the built-in pull-to-refresh is enabled
            self.pullToRefreshEnabled = YES;

            // Whether the built-in pagination is enabled
            self.paginationEnabled = NO;
        }
        return self;
    }


    - (void)viewDidLoad
    {
        [super viewDidLoad];

    }

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

    }


    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject
*)object {

        static NSString *CellIdentifier = @"colorsCell";
        CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

        if (cell == nil) {
            cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

        }
        cell.imagevieww.file= [object objectForKey:@"ImageURL"];
        [cell.imagevieww loadInBackground];

        cell.cellTitle.text = [object objectForKey:@"cellTitle"];
        cell.cellDescript.text = [object objectForKey:@"cellDescript"];



        return cell;
    }

    @end

Customcell.h

#import <Parse/Parse.h>

@interface TableViewCell : PFTableViewCell
@property (strong, nonatomic) IBOutlet UILabel *cellTitle;
@property (strong, nonatomic) IBOutlet UILabel *cellDescript;
@property (strong, nonatomic) IBOutlet UILabel *price;
@property (strong, nonatomic) IBOutlet PFImageView *imagevieww;
@end

Answer 1

PFImageView 仅链接到存储在 Parse.com 上并由 PFFile 对象表示的文件。您不能将cell.imagevieww.file 设置为字符串并让它工作。

如果您使用普通 URL 指向网络上的任意图像，那么您应该使用 SDWebImage（或类似的通用解决方案）作为单元格上的图像视图。

---

使用SDWebImage，您将替换：

    cell.imagevieww.file= [object objectForKey:@"ImageURL"];
    [cell.imagevieww loadInBackground];

与：

    [cell.imagevieww setImageWithURL:[NSURL URLWithString:[object objectForKey:@"ImageURL"]]
                    placeholderImage:[UIImage imageNamed:@"placeholder.png"]];