在我看来确实加载了:我需要一个从URL提取图像的函数(异步)
但有时我看到图片,有时却看不到

我的密码
在viewDidLoad中

if(entry.length > 0)
{
    [self getPicture];
}
else
{
    ProfilePicure.image = [UIImage imageNamed:@"icon_man.png"];
}
 [topView addSubview:ProfilePicure];
[self.view setBackgroundColor:UIColorFromRGB(0xffffff)];
[self.view addSubview:topView];

提取功能:
   - (void) getPicture
  {
  [WebImageOperations loadFromURL:entry andBlock:^(UIImage *imageData).
  {
     if (self.view.window)
     {
         UIImage *image1 = imageData;
         ProfilePicure.image = image1;
     }
  }];
   //Tried to add those to be able to see the picture, but sometimes i can't see
 [self.view setNeedsDisplay];
 [topView addSubview:ProfilePicure];
 [topView setNeedsDisplay];
  }

编辑:添加获取功能,我从该站点复制并使用它来获取图像。
   + (void)loadFromURL:(NSString *)urlString andBlock:(void (^)(UIImage *image))processImage
 {
     NSMutableString *urlSTR =[[NSMutableString alloc]init];
    [urlSTR appendString:@"http://www.ifat.com/files/infor/Person/"];
    [urlSTR appendString:urlString];
    NSURL *urlGet = [NSURL URLWithString:urlSTR];
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
    dispatch_async(queue, ^{
    NSData * imageData = [NSData dataWithContentsOfURL:urlGet];
    dispatch_async(dispatch_get_main_queue(), ^{
       UIImage * image = [UIImage imageWithData:imageData];
        processImage(image);
     });
});
}

最佳答案

您可能需要检查url,如果其中包含无法获取图像的sapce。如果是这样,那么您需要使用

urlSTR = [urlSTR stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

在这行之后
[urlSTR appendString:@"http://www.ifat.com/files/infor/Person/"];
[urlSTR appendString:urlString];

并检查一下。这可能会有所帮助。

您使简单的事情变得复杂。您可以轻松地从网址下载图片。
NSMutableString *urlSTR =[[NSMutableString alloc]init];
[urlSTR appendString:@"http://smartradio.ch/APPETLM/admin/media_files/event/thumb/aaa162635eda024ee7dd908554b1b6cb.jpg"];
 NSURL *url = [NSURL URLWithString:[urlSTR stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
dispatch_async(dispatch_get_global_queue(0,0), ^{
    NSData *data = [[NSData alloc] initWithContentsOfURL:url];
    if ( data == nil )
        ProfilePicure.image = [UIImage imageNamed:@"icon_man.png"];
    dispatch_async(dispatch_get_main_queue(), ^{
        // WARNING: is the cell still using the same data by this point??
        ProfilePicure.image=[UIImage imageWithData:data];


    });

});

放在您的视图中确实加载了。首先使用一些静态网址图片进行检查,然后实施您的网址

10-08 05:30
查看更多