Question

我有一个视图控制器，其中包含UIImageView和UILabel。如何使用数组从JSON加载图像和数据？这是我的代码

-(void)viewDidLoad 
{
[super viewDidLoad];
NSURLRequest *request = [[NSURLRequest alloc]initWithURL:[NSURL URLWithString:"www.example.com"]];
       connection4 = [[NSURLConnection alloc]initWithRequest:request delegate:self];
      [connection4 start];
}
  -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
  {
   if (connection == connection4)
    {
    myDataQA = [[NSMutableData alloc]init];
    }
}
 -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
   {
    if (connection == connection4)
     {
    [myDataQA appendData:data];
     }
  }
  -(void)connectionDidFinishLoading:(NSURLConnection *)connection
  {
   if (connection == connection4)
     {
    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:myDataQA options:NSJSONReadingAllowFragments error:nil];
    fldExamTitleArray = [dic valueForKey:@"fldexamtitle"];
    fldExamStartArray = [dic valueForKey:@"examdate"];
    ListBannerArray =  [dic valueForKey:@"listBanner"];
   }
 }

在我的代码中，ListBannerArray包含：

＆＃34; listbanner＆＃34;：＆＃34; HTTP：demo.example.com/1.png

Answer 1

 -(void)connectionDidFinishLoading:(NSURLConnection *)connection
   {
     if (connection == connection4)
     {
        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:myDataQA options:NSJSONReadingAllowFragments error:nil];
       fldExamTitleArray = [dic valueForKey:@"fldexamtitle"];
       fldExamStartArray = [dic valueForKey:@"examdate"];
       ListBannerArray =  [dic valueForKey:@"listBanner"];

     for(int i = 0 ; i < ListBannerArray.count;i++)
       {
           UIImage* myImage = [UIImage imageWithData:[NSData dataWithContentsOfURL: [NSURL URLWithString:  [ListBannerArray objectAtIndex: i ]]];
           yourimageview.image = myimage;
          your_Label.text = [fldExamTitleArray objectAtIndex : i];
        }
     }
 }

Answer 2

首先，你必须循环你的数组和数组包含字典。所以你需要从该字典中获取图像网址。之后，您可以像这样加载图像。

NSString *ImageURL = @"YourURLHere";
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:ImageURL]];
imageView.image = [UIImage imageWithData:imageData];

如何在视图控制器中传递阵列数据将来自JSON的数组？

2 个答案: