Ios 我有一个自定义表，我想显示来自json的图像，但它在所有行中显示相同的图像

首先，在接口部分全局创建一个

NSMutableArray

，并在

viewDidLoad

方法中初始化它

 // delegate method that returns json   
-(void)repaint:(NSMutableArray *)retrievedData
{
    if (retrievedData.count > 0)
    {
        userObj = [retrievedData objectAtIndex:0];

        for (userObj in retrievedData)
        {
        NSLog(@"%@is the value",retrievedData);

        url_Img1=@"http://kiascenehai.pk/assets/uploads/event-images/50x50-thumb/";
        url_Img2=userObj.event_dpURL;
        url_Img_FULL = [url_Img1 stringByAppendingPathComponent:url_Img2];

        NSLog(@"Show url_Img_FULL: %@",url_Img_FULL);
            [tableData addObjectsFromArray:retrievedData];
            [table reloadData];
        }

    }
}
//to display data in table:::
[[cell imageView] setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:url_Img_FULL]]]];

在此之后，添加

url\u Img\u FULL

内部

arr

NSMutableArray *arr;

在

cellforrowatinexpath

[arr addObject:url_Img_FULL];

到

---

同样在

numberofrowsatindepath

return arr.count.

将其放入for循环[[cell-imageView]setImage:[UIImage-imageWithData:[NSData-dataWithContentsOfURL:[NSURL-URLWithString:url\Img\u FULL]]；实际上，直接调用url\u Img\u FULL，它只显示最后一个图像将url\u Img\u FULL添加到一个NSMutableArrayWellcome到StackOverflow。请添加有关您所面临问题的更多详细信息。复制粘贴您的代码不会有帮助

userObj

用于两个范围，无法确定您使用的是哪个

userObj

。yogesh它工作不正常。如果json得到长响应，应用程序将崩溃。由于未捕获的异常“NSInvalidArgumentException”，您是否有其他ideaTerminating应用程序，原因：'-[用户长度]：未识别的选择器发送到实例0xa4ed500'@user3807662它与tableview无关，它与其他内容相关，无法对对象

User

使用

length

。由于未捕获的异常而终止应用程序'NSRangeException[[cell imageView]setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:arr[indexath.row]]]；这里显示：线程1 sigbrit

[[cell imageView] setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:arr[indexPath.row]]]]];

[[cell imageView] setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:arr[indexPath.row]]]]];

Use GCD to download some thing like this

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
    dispatch_async(queue, ^(void) {

       //write the code to download image


         }
        dispatch_async(dispatch_get_main_queue(), ^{
            // Capture the indexPath variable, not the cell variable, and use that


            [tableview reloadData];

        });
    });

and cellforrowatindexpath write

if(are.count>0)
{
[[cell imageView] setImage:[UIImage imageWithData:arr[indexPath.row]]]]];
}

return cell;