ios - 如何在 UIImageView 中加载图像数组

Question

我想在单个 ImageView 中加载图像阵列(图像像图像 slider 一样一个接一个地加载)。我通过网络服务器 (JSON) 获取图像数组。我尝试了很多次，但我的应用程序崩溃了，并且多次显示错误。请帮助我如何创建图像 slider 。谢谢你

我的代码

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;

NSLog(@"Error in receiving data %@",error);
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves  error:&error];
NSLog(@"response data %@",json);

NSArray* results = [json objectForKey:@"status"];
NSArray *imagearray = [results valueForKey:@"slider_image_path"];
NSLog(@"images %@",imagearray);

 self.imageview.animationImages = imagearray;
    _imageview.animationDuration = 10;
    _imageview.animationRepeatCount = 0;
    [_imageview startAnimating];
     }

Answer 1

您是从服务器获取图像 url 而不是图像本身，因此 imagearray 现在是 url 的集合，您不能直接将 url 本身设置为 animationImages。所以您接下来需要做的是您需要从图像 url 下载图像，然后将数组(将包含 UIImage 的实例)设置为 ImageView animationImages 属性。

更新

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSError *error;

    NSLog(@"Error in receiving data %@",error);
    NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves  error:&error];
    NSLog(@"response data %@",json);

    NSArray* results = [json objectForKey:@"status"];
    NSArray *imageUrlArray = [results valueForKey:@"slider_image_path"];
    NSLog(@"images %@",imagearray);

    NSMutableArray *arrayImages = [[NSMutableArray alloc] init];

    //Updated for loop, previously in hurry i was setting url string as a url to the URLWithString method, now its working fine.
    for (NSString *strImageUrl in imageUrlArray) {
        [arrayImages addObject:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:strImageUrl]]]];
    }

    self.imageview.animationImages = arrayImages;
    _imageview.animationDuration = 10;
    _imageview.animationRepeatCount = 0;
    [_imageview startAnimating];
}