如何在iPhone中顯示從URL下載的圖像？

Question

我正在從網址下載圖像並保存。 當我嘗試使用ImageView在UI中顯示相同的圖像時，我無法做到這一點。 因此，請在以下代碼中建議我需要做哪些更改。

謝謝。

{

NSLog(@"Downloading...");

    UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.objectgraph.com/images/og_logo.png"]]];

    NSLog(@"%f,%f",image.size.width,image.size.height);

    NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

    NSLog(@"%@",docDir);

    NSLog(@"saving png::::%@", docDir);
    NSString *pngFilePath = [NSString stringWithFormat:@"%@/test.png",docDir];
    NSData *data1 = [NSData dataWithData:UIImagePNGRepresentation(image)];
    [data1 writeToFile:pngFilePath atomically:YES];

 NSString *sss = [docDir stringByAppendingString:@"/test.png"];

    imageView1.image = [UIImage imageNamed:sss];

    NSLog(@"------%@",sss);

[image release];

}

Answer 1

UIImage *theUIimage = [UIImage imageNamed:sss];
image = [[UIImageView alloc] initWithImage:theUIimage];
[imageView1 addSubview:image];

Answer 2

你的imageView是如何初始化的？ 確保還指定imageView.frame 。

例如：

CGRect frame = CGRectMake(xPositionInView,yPositionInView,
                          image.size.width,image.size.height); 
imageView.frame = frame;