我试图在URL中显示带有“https”的图像,但我不知道它为什么不显示。 (例如https://www.starkmedia.com/blog/wp-content/uploads/2016/02/https.png)。我不知道发生了什么问题,因为我也没有得到任何例外。有人能帮我弄清楚什么地方出了问题,怎样才能正确显示图像?图像不显示在iOS应用程序
我是Xcode的新手,我只是想对其他开发人员编写的代码进行一些更改。
- (void)downloadImageFromUrl:(NSString *)urlString
{
NSLog(@"Url String: %@", urlString);
self.imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0.0, 0.0, 179, 245)];
NSData *imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString:urlString]];
self.imageView.image = [UIImage imageWithData:imageData];
self.imageView.userInteractionEnabled = YES;
self.imageView.autoresizesSubviews = YES;
[MBProgressHUD hideHUDForView:self.view animated:YES];
[self showImage];
}
- (void)showImage
{
if ([self.scrollView.subviews count] == 3) {
[self.imageView removeFromSuperview];
}
self.scrollView.alpha = 1;
self.imageView = [[UIImageView alloc] initWithImage:self.image];
self.imageView.frame = (CGRect){.origin=CGPointMake(0.0f, 0.0f), .size=self.image.size};
[self.scrollView addSubview:self.imageView];
// 2
self.scrollView.contentSize = self.image.size;
// 3
UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(scrollViewDoubleTapped:)];
doubleTapRecognizer.numberOfTapsRequired = 2;
doubleTapRecognizer.numberOfTouchesRequired = 1;
[self.scrollView addGestureRecognizer:doubleTapRecognizer];
UITapGestureRecognizer *twoFingerTapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(scrollViewTwoFingerTapped:)];
twoFingerTapRecognizer.numberOfTapsRequired = 1;
twoFingerTapRecognizer.numberOfTouchesRequired = 2;
[self.scrollView addGestureRecognizer:twoFingerTapRecognizer];
// 4
CGRect scrollViewFrame = self.scrollView.frame;
CGFloat scaleWidth = scrollViewFrame.size.width/self.scrollView.contentSize.width;
CGFloat scaleHeight = scrollViewFrame.size.height/self.scrollView.contentSize.height;
CGFloat minScale = MIN(scaleWidth, scaleHeight);
self.scrollView.minimumZoomScale = minScale;
// 5
NSString *model = [[UIDevice currentDevice] model];
if([model isEqualToString:@"iPad"]) {
self.scrollView.maximumZoomScale = 1.5f;
}
else {
self.scrollView.maximumZoomScale = 1.5f;
}
self.scrollView.zoomScale = minScale;
// 6
[self centerScrollViewContents];
}