将资产列表(数组)保存到特定的 CKRecord
Saving an Asset List (array) to specific CKRecord
我在 CloudKit 后端创建了一个 CKRecord 类型,其中包含一些与 class 相关的属性。
我有字符串属性、字节和资产列表 属性,因此存储一些图像(与单个记录相关的多个图像)。
现在我正在尝试存储一些图像,然后填充 属性,然后尝试将其保存到 CloudKit,但它不起作用。
代码如下:
var images_array = [CKAsset]()
// append the an image to the array
images_array.append(CKAsset(fileURL: writeImage(image: selectedImage) as URL))
let record = CKRecord(recordType: recordName)
record["class_title"] = someString as CKRecordValue
record["class_body"] = someString as CKRecordValue
record["images_array"] = images_array as CKRecordValue
saveRecord(record)
func saveRecord(_ xrecord: CKRecord) {
let publicData = CKContainer.default().publicCloudDatabase
let record: [CKRecord] = [xrecord]
let saveOperation = CKModifyRecordsOperation.init(recordsToSave: record, recordIDsToDelete: nil)
saveOperation.perRecordCompletionBlock = {(record, error) -> Void in
if (error != nil) {
print("error")
}
}
publicData.add(saveOperation)
}
func writeImage(image: UIImage) -> URL {
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let fileURL = NSURL(fileURLWithPath: documentsURL.absoluteString).appendingPathComponent(".jpg")
if let imageData = image.lowestQualityJPEGNSData {
do {
try imageData.write(to: fileURL!)
} catch {
print("ERRO 001 = \(error.localizedDescription)")
}
}
return fileURL!
}
extension UIImage {
var uncompressedPNGData: Data? { return UIImagePNGRepresentation(self) }
var highestQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 1.0) }
var highQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.75) }
var mediumQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.5) }
var lowQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.25) }
var lowestQualityJPEGNSData:Data? { return UIImageJPEGRepresentation(self, 0.0) }
}
如果我只保存字符串,则一切正常,但对于图像,它不会保存记录。
我知道附加可能有任何问题,或者我必须以其他方式保存数组,或者我不应该将它保存为 CKRecordValue。
关于如何实现这一点,您有什么建议吗?
谢谢
您必须使用 CKAsset
的数组作为图像。
var imageUrls = [CKAsset]()
现在使用 for 循环获取所有图像。并保存图像的CKAsset。
for images in self.arrayImageSelected{
var myImage = UIImage()
if (images.isKindOfClass(PHAsset)){
let imageC = images as? PHAsset
myImage = self.getAssetThumbnail(imageC!)
}else if (images.isKindOfClass(UIImage)){
myImage = (images as? UIImage)!
}
let imagePath = self.storeImageAtDocumentDirectory(myImage, titleName: self.strTitle)
myPAth.append(imagePath)
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
let FbPath = paths.stringByAppendingString("/Custom")
let filePathToWrite = "\(FbPath)" + imagePath
let urls = NSURL(fileURLWithPath: filePathToWrite)
let imageAsset = CKAsset(fileURL: urls)
imageUrls.append(imageAsset)
}
设置你的数组。
record.setObject(imageUrls, forKey: "images_array")
当您创建本地资产文件时,您应该使用原子写入选项。这将确保在 CloudKit 尝试上传资产之前完整写入文件。
这是我在Seam 3库中使用的资产文件创建函数:
fileprivate func createAsset(data: Data) -> CKAsset? {
var returnAsset: CKAsset? = nil
let tempStr = ProcessInfo.processInfo.globallyUniqueString
let filename = "\(tempStr)_file.bin"
let baseURL = URL(fileURLWithPath: NSTemporaryDirectory())
let fileURL = baseURL.appendingPathComponent(filename, isDirectory: false)
do {
try data.write(to: fileURL, options: [.atomicWrite])
returnAsset = CKAsset(fileURL: fileURL)
} catch {
print("Error creating asset: \(error)")
}
return returnAsset
}
我在 CloudKit 后端创建了一个 CKRecord 类型,其中包含一些与 class 相关的属性。
我有字符串属性、字节和资产列表 属性,因此存储一些图像(与单个记录相关的多个图像)。
现在我正在尝试存储一些图像,然后填充 属性,然后尝试将其保存到 CloudKit,但它不起作用。
代码如下:
var images_array = [CKAsset]()
// append the an image to the array
images_array.append(CKAsset(fileURL: writeImage(image: selectedImage) as URL))
let record = CKRecord(recordType: recordName)
record["class_title"] = someString as CKRecordValue
record["class_body"] = someString as CKRecordValue
record["images_array"] = images_array as CKRecordValue
saveRecord(record)
func saveRecord(_ xrecord: CKRecord) {
let publicData = CKContainer.default().publicCloudDatabase
let record: [CKRecord] = [xrecord]
let saveOperation = CKModifyRecordsOperation.init(recordsToSave: record, recordIDsToDelete: nil)
saveOperation.perRecordCompletionBlock = {(record, error) -> Void in
if (error != nil) {
print("error")
}
}
publicData.add(saveOperation)
}
func writeImage(image: UIImage) -> URL {
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
let fileURL = NSURL(fileURLWithPath: documentsURL.absoluteString).appendingPathComponent(".jpg")
if let imageData = image.lowestQualityJPEGNSData {
do {
try imageData.write(to: fileURL!)
} catch {
print("ERRO 001 = \(error.localizedDescription)")
}
}
return fileURL!
}
extension UIImage {
var uncompressedPNGData: Data? { return UIImagePNGRepresentation(self) }
var highestQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 1.0) }
var highQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.75) }
var mediumQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.5) }
var lowQualityJPEGNSData: Data? { return UIImageJPEGRepresentation(self, 0.25) }
var lowestQualityJPEGNSData:Data? { return UIImageJPEGRepresentation(self, 0.0) }
}
如果我只保存字符串,则一切正常,但对于图像,它不会保存记录。
我知道附加可能有任何问题,或者我必须以其他方式保存数组,或者我不应该将它保存为 CKRecordValue。
关于如何实现这一点,您有什么建议吗?
谢谢
您必须使用 CKAsset
的数组作为图像。
var imageUrls = [CKAsset]()
现在使用 for 循环获取所有图像。并保存图像的CKAsset。
for images in self.arrayImageSelected{
var myImage = UIImage()
if (images.isKindOfClass(PHAsset)){
let imageC = images as? PHAsset
myImage = self.getAssetThumbnail(imageC!)
}else if (images.isKindOfClass(UIImage)){
myImage = (images as? UIImage)!
}
let imagePath = self.storeImageAtDocumentDirectory(myImage, titleName: self.strTitle)
myPAth.append(imagePath)
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
let FbPath = paths.stringByAppendingString("/Custom")
let filePathToWrite = "\(FbPath)" + imagePath
let urls = NSURL(fileURLWithPath: filePathToWrite)
let imageAsset = CKAsset(fileURL: urls)
imageUrls.append(imageAsset)
}
设置你的数组。
record.setObject(imageUrls, forKey: "images_array")
当您创建本地资产文件时,您应该使用原子写入选项。这将确保在 CloudKit 尝试上传资产之前完整写入文件。
这是我在Seam 3库中使用的资产文件创建函数:
fileprivate func createAsset(data: Data) -> CKAsset? {
var returnAsset: CKAsset? = nil
let tempStr = ProcessInfo.processInfo.globallyUniqueString
let filename = "\(tempStr)_file.bin"
let baseURL = URL(fileURLWithPath: NSTemporaryDirectory())
let fileURL = baseURL.appendingPathComponent(filename, isDirectory: false)
do {
try data.write(to: fileURL, options: [.atomicWrite])
returnAsset = CKAsset(fileURL: fileURL)
} catch {
print("Error creating asset: \(error)")
}
return returnAsset
}