如何在 Swift 4 中使用 SDWebImage 缓存从 firebase 存储中获取的图像数组?
How to cache an array of Images fetched from firebase Storage using SDWebImage in Swift 4?
我正在以数据的形式从 firebase 存储中获取图像,我想使用 SDWebImage 将图像缓存在我的应用程序中。请指导我如何实现它?
for x in images_list{
let storageRef = storage.child("images/\(x).jpg")
storageRef.getData(maxSize: 1 * 1024 * 1024) { (data, error) in
if let error = error{
print(error.localizedDescription)
return
}
else{
imagesarray.append(UIImage(data: data!)!)
}
if let x = images_list.last{
cell.imageDemo.animationImages = imagesarray
cell.imageDemo.sd_setImage(with: storageRef) // Here I Want to cache the images of **imagesarray** that are being animated
cell.imageDemo.animationDuration = 2
cell.imageDemo.startAnimating()
}
}
}
您在问题中直接从 firebase 下载 imageData。您将需要使用 downloadURL
方法,而不是使用 getData
。像这样:
for x in image_list {
let storageRef = storage.child("images/\(x).jpg")
//then instead of downloading data download the corresponding URL
storageRef.downloadURL { url, error in
if let error = error {
} else {
//make your imageArray to hold URL rather then images directly
imagesArray.append(url)
}
}
}
//////This is were you would use those url////////
let url = imageArray.first!
imageView.sd_setImage(with: url, completed: nil)
这里最重要的部分是下载 url 而不是图像数据。每当您将图像 url 设置为 imageView 时,SDWebImage 库将缓存它并在已缓存时显示
我使用了 downloadURL 方法并缓存了图像数组,而不是 getData 方法。
var imagesarray = [URL]()
for x in images_list{
let storageRef = storage.child("images/\(x).jpg")
storageRef.downloadURL { (url, error) in
if let error = error{
print(error.localizedDescription)
}
else{
imagesarray.append(url!)
}
if let x = images_list.last{
cell.imageDemo.sd_setAnimationImages(with: imagesarray)
cell.imageDemo.animationDuration = 2
cell.imageDemo.startAnimating()
}
}
}
我正在以数据的形式从 firebase 存储中获取图像,我想使用 SDWebImage 将图像缓存在我的应用程序中。请指导我如何实现它?
for x in images_list{
let storageRef = storage.child("images/\(x).jpg")
storageRef.getData(maxSize: 1 * 1024 * 1024) { (data, error) in
if let error = error{
print(error.localizedDescription)
return
}
else{
imagesarray.append(UIImage(data: data!)!)
}
if let x = images_list.last{
cell.imageDemo.animationImages = imagesarray
cell.imageDemo.sd_setImage(with: storageRef) // Here I Want to cache the images of **imagesarray** that are being animated
cell.imageDemo.animationDuration = 2
cell.imageDemo.startAnimating()
}
}
}
您在问题中直接从 firebase 下载 imageData。您将需要使用 downloadURL
方法,而不是使用 getData
。像这样:
for x in image_list {
let storageRef = storage.child("images/\(x).jpg")
//then instead of downloading data download the corresponding URL
storageRef.downloadURL { url, error in
if let error = error {
} else {
//make your imageArray to hold URL rather then images directly
imagesArray.append(url)
}
}
}
//////This is were you would use those url////////
let url = imageArray.first!
imageView.sd_setImage(with: url, completed: nil)
这里最重要的部分是下载 url 而不是图像数据。每当您将图像 url 设置为 imageView 时,SDWebImage 库将缓存它并在已缓存时显示
我使用了 downloadURL 方法并缓存了图像数组,而不是 getData 方法。
var imagesarray = [URL]()
for x in images_list{
let storageRef = storage.child("images/\(x).jpg")
storageRef.downloadURL { (url, error) in
if let error = error{
print(error.localizedDescription)
}
else{
imagesarray.append(url!)
}
if let x = images_list.last{
cell.imageDemo.sd_setAnimationImages(with: imagesarray)
cell.imageDemo.animationDuration = 2
cell.imageDemo.startAnimating()
}
}
}