Ios 如何将映像作为CKAsset正确发送到CloudKit？

我有一个图像（UIImage和它的url），我试图将其作为CKAsset发送到CloudKit，但我遇到了以下错误：

由于未捕获的异常“NSInvalidArgumentException”终止应用程序，原因是：“非文件url”

。代码如下：

override func viewDidLoad() {
        super.viewDidLoad()

        send2Cloud()
    }

func send2Cloud() {
    let newUser = CKRecord(recordType: "User")

    let url = NSURL(string: self.photoURL)

    let asset = CKAsset(fileURL: url!)

    newUser["name"] = self.name
    newUser["photo"] = asset

    let publicData = CKContainer.defaultContainer().publicCloudDatabase

    publicData.saveRecord(newUser, completionHandler: { (record: CKRecord?, error: NSError?) in

        if error == nil {

            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                print("User saved")
            })

        } else {
            print(error?.localizedDescription)
        }
    })
}

我有网址，我可以打印它，复制和粘贴到我的导航器，它会显示我的图像！所以，我不知道这里发生了什么

---

如果我使用UIImage而不是它的URL，会更容易吗？因为，正如我之前说过的，我两个都有！非常感谢您的帮助！谢谢，伙计们

根据我的经验，将上传

UIImage

保存为

CKAsset

的唯一方法是：

将映像临时保存到磁盘

创建CKAsset

删除临时文件

---

---

---

几个月前，我提交了一份错误报告，请求能够从内存中初始化

CKAsset

，但还没有完成。我做了一件稍有不同的事情：我创建了一个可以在多个地方使用的类，这要感谢Swift的去初始化功能（与C++不同），它会自行清理：

//
//  ImageAsset.swift
//

import CloudKit
import UIKit

class ImageAsset {
    
    let image:UIImage
    
    var url:NSURL?
    
    var asset:CKAsset? {
        get {
            let data = UIImagePNGRepresentation(self.image)
            self.url = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent(NSUUID().UUIDString+".dat")
            if let url = self.url {
                do {
                    try data!.writeToURL(url, options: [])
                } catch let e as NSError {
                    print("Error! \(e)")
                }
                return CKAsset(fileURL: url)
            }
            return nil
        }
    }
    
    init(image:UIImage){
        self.image = image
    }
    
    deinit {
        if let url = self.url {
            do {
                try NSFileManager.defaultManager().removeItemAtURL(url) }
            catch let e {
                print("Error deleting temp file: \(e)")
            }
        }
    }
    
    
}

下面是一个单元测试，用于测试它（假设测试目标中有一个名为stopwatch的图像）：

---

本来打算在UIImage上做一个扩展，但后来Denit让我转到了一个类。

这是如何将图像保存到Cloudkit的Objective C版本

这需要相当多的挖掘，因为没有太多的信息，但这是可行的

  if([results count] <= 0) {



            NSLog(@"this Record doesnt exist so add it ok!! %@", error);

            CKRecordID *wellKnownID = [[CKRecordID alloc]
                                       initWithRecordName:idString];


            CKRecord *entitiesName = [[CKRecord alloc] initWithRecordType:@"mySavedDetails"
                                                             recordID:wellKnownID];


            [entitiesName setObject:idString
                         forKey:@"myDetailsId"];

            [entitiesName setObject:self.myName.text
                         forKey:@"myName"];



    if (myUIImage.image != nil)
                 {
                     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                                          NSUserDomainMask, YES);
                     NSString *documentsDirectory = [paths objectAtIndex:0];
                     NSString* path = [documentsDirectory stringByAppendingPathComponent:
                                       @"test.png" ];
                     NSData* data = UIImagePNGRepresentation(myUIImage.image.image);
                     [data writeToFile:path atomically:YES];

    //so we get the full path of the uiimage

                     NSLog(@"Path details %@",path);


                     NSURL* myImagePath = nil;
                     myImagePath =
                     [[NSBundle mainBundle] URLForResource:path
                                             withExtension:@"png"];



 //here we change the path of Image which is a string to a URL
                     NSURL *yourURL = [NSURL fileURLWithPath:path];

                     CKAsset* myImageAsset = nil;
                     myImageAsset =
                     [[CKAsset alloc] initWithFileURL:yourURL];




                [entitiesName setObject: myImageAsset
                              forKey:@"myImage"];




                [publicDatabase saveRecord: entitiesName
                          completionHandler:^(CKRecord *savedState, NSError *error) {
                              if (error) {
                                  NSLog(@"ERROR SAVING: %@", error);
                              }


                          }];



                 }




            }

---

if（[results count]读取错误。
self.photoURL
不是文件URL。它是什么？打印URL并在问题中发布输出。
self.photoURL
是一个字符串。我使用Facebook请求获取用户数据！这是输出：（）如果字符串表示本地文件路径，则只需使用
fileURLWithPath
初始值设定项而不是
string
初始值设定项来正确创建
NSURL
。谢谢，圣诞老人！！如果要将CKAsset对象转换为数据对象，或将CKAsset对象转换为图像，您会怎么做呢ode>类型“Data”的值没有成员“writeToURL”

您应该将文件写入临时目录，而不是documentsDirectory

//
//  ImageExtensionTests.swift
//

import CloudKit
import XCTest
@testable import BudgetImpactEstimator

class ImageExtensionTests: XCTestCase {

    let testImageName = "stopwatch" // provide the name of an image in test bundle
    override func setUp() {
        super.setUp()
        // Put setup code here. This method is called before the invocation of each test method in the class.
    }
    
    override func tearDown() {
        // Put teardown code here. This method is called after the invocation of each test method in the class.
        super.tearDown()
    }

    func testConvertingImageToAsset() {
        guard let image = UIImage(named: self.testImageName) else {
            XCTFail("failed to load image")
            return
        }
        let imageAsset = ImageAsset(image: image)
        XCTAssertNotNil(imageAsset)
        
        guard let asset = imageAsset.asset else {
            XCTFail("failed to get asset from image")
            return
        }
        
        print("constructed asset: \(asset)")
    }


}

  if([results count] <= 0) {



            NSLog(@"this Record doesnt exist so add it ok!! %@", error);

            CKRecordID *wellKnownID = [[CKRecordID alloc]
                                       initWithRecordName:idString];


            CKRecord *entitiesName = [[CKRecord alloc] initWithRecordType:@"mySavedDetails"
                                                             recordID:wellKnownID];


            [entitiesName setObject:idString
                         forKey:@"myDetailsId"];

            [entitiesName setObject:self.myName.text
                         forKey:@"myName"];



    if (myUIImage.image != nil)
                 {
                     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                                          NSUserDomainMask, YES);
                     NSString *documentsDirectory = [paths objectAtIndex:0];
                     NSString* path = [documentsDirectory stringByAppendingPathComponent:
                                       @"test.png" ];
                     NSData* data = UIImagePNGRepresentation(myUIImage.image.image);
                     [data writeToFile:path atomically:YES];

    //so we get the full path of the uiimage

                     NSLog(@"Path details %@",path);


                     NSURL* myImagePath = nil;
                     myImagePath =
                     [[NSBundle mainBundle] URLForResource:path
                                             withExtension:@"png"];



 //here we change the path of Image which is a string to a URL
                     NSURL *yourURL = [NSURL fileURLWithPath:path];

                     CKAsset* myImageAsset = nil;
                     myImageAsset =
                     [[CKAsset alloc] initWithFileURL:yourURL];




                [entitiesName setObject: myImageAsset
                              forKey:@"myImage"];




                [publicDatabase saveRecord: entitiesName
                          completionHandler:^(CKRecord *savedState, NSError *error) {
                              if (error) {
                                  NSLog(@"ERROR SAVING: %@", error);
                              }


                          }];



                 }




            }