ios - 通过 URL 从 Swift 上的 Firebase 下载图像时横向加载
<p><p>我目前正在从 Firebase 上传和下载图片。我将 URL 作为字符串存储在变量 profilePicture 中,然后使用 URLsession 下载图像。但是,每次照片都横向加载。但是,当我最初从相机胶卷中挑选图片时,它以正确的方式显示。对可能发生的事情有任何想法吗? </p>
<p>上传图片:
当我上传图片时,一旦完全保存,我将 URL 设置为变量 profilePicture。</p>
<pre><code> var storageRef : FIRStorageReference = FIRStorageReference()
if let uid = currentUser?.uid {
storageRef = FIRStorage.storage().reference().child("\(uid).png")
}
if let uploadData = UIImagePNGRepresentation(profilePictureImageView.image!) {
let uploadTask = storageRef.put(uploadData, metadata: nil) { snapshot, error in
if let error = error {
print(error)
}
}
// Shows progress bar until saved
uploadTask.observe(.progress) { snapshot in
self.progressBar.observedProgress = snapshot.progress
self.progressBar.isHidden = false;
}
uploadTask.observe(.success) { snapshot in
if let profileImageURL = snapshot.metadata?.downloadURL()?.absoluteString {
self.user?.profilePicture = profileImageURL
self.progressBar.isHidden = true;
self.savedLabel.isHidden = false
}
}
}
</code></pre>
<p>下载图片:</p>
<pre><code> if let profileImageURL = user?.profilePicture {
if let url = URL(string: profileImageURL) {
URLSession.shared.dataTask(with: url, completionHandler: { (data, response, error) in
if error != nil {
print(error!)
return
}
DispatchQueue.main.async {
self.profilePictureImageView.image = UIImage(data: data!)
self.activityIndicator.stopAnimating()
}
}).resume()
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>我感觉这与图像方向问题有关,而不是 Firebase 领域的任何问题。像 <a href="https://stackoverflow.com/questions/10600613/ios-image-orientation-has-strange-behavior" rel="noreferrer noopener nofollow">iOS Image Orientation has Strange Behavior</a> </p></p>
<p style="font-size: 20px;">关于ios - 通过 URL 从 Swift 上的 Firebase 下载图像时横向加载,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/42501820/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/42501820/
</a>
</p>
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