有关Web服务图像的问题无法在输出中显示

Question

NSURL *url=[NSURL URLWithString:elementurl];
NSLog(@"url %@", url);
NSData *data = [NSData dataWithContentsOfURL:url];
NSLog(@"data = %@, length = %i", data, [data length]);
UIImage *image = [[UIImage alloc] initWithData:data];
[data release];

iam not getting the data can any one suggest another method

Answer 1

pragma mark --------------------------

pragma mark加载UserImage

- （无效）loadUserImage {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSString * frameImagePath = [profileInfoDict objectForKey：@“photo”];

imageData = [NSData dataWithContentsOfURL：[NSURL URLWithString：frameImagePath]];  if（[imageData length] == 0）{   / * NSString * imagePath = [[NSString alloc] initWithFormat：@“％@ /％@”，[[NSBundle mainBundle] resourcePath]，@“no_image.png”];    UIImage image = [[UIImage alloc] initWithContentsOfFile：imagePath];    [item setObject：image forKey：@“itemImage”];    [imagePath发布];    [image release]; /  }  其他{   [self performSelectorOnMainThread：@selector（imageget :) withObject：imageData waitUntilDone：NO];

}  [池发布];

} - （void）imageget：（NSData *）数据 {  UIImage * image = [[UIImage alloc] initWithData：data];  userImageImageView.contentMode = UIViewContentModeScaleAspectFit;  userImage =图像;  userImageImageView.image = image;  [[mAppDelegate.userInfoArray objectAtIndex：1] setValue：image forKey：@“Image”];

}

Answer 2

您使用的方法适用于小图像。如果您尝试下载大图像，则无法正常运行。

您可以使用以下代码

NSURLRequest * request = [NSURLRequest requestWithURL：url cachePolicy：NSURLRequestReloadIgnoringCacheData timeoutInterval：60];     connection = [[NSURLConnection alloc] initWithRequest：request delegate：self];

建立连接

• （void）connection：（NSURLConnection *）theConnection didReceiveData：（NSData *）incrementalData
• （无效）connectionDidFinishLoading：（NSURLConnection的*）theConnection
• （void）connection：（NSURLConnection *）connection didFailWithError：（NSError *）error

以上方法用于接收数据，错误处理等......

现在使用此方法应用您自己的逻辑。