Swift Azure Mobile QuickStart - Add and sync PNG image

问题

New to iPhone, Swift. Using XCode 9.3

I am trying to modify the Azure QuickStart iPhone Swift app to include an Images.xcassets PGN image.

The app uses: https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/app-service-mobile/app-service-mobile-ios-how-to-use-client-library.md

I only want to work with 1 Azure Sql Server table and NOT use Azure BLOB storage.

Method: Convert the PNG to Base64 String

Swift code changes 1. QSTodoDataModel.xcdatamodeid - Added Attribute: pic, Type: String 2. Convert the PNG to type Base64 String

let myPicUI = #imageLiteral(resourceName: "apic")
 // ** Also tried: let myPicUI : UIImage = UIImage(named: "apic")!

 let myPicNSData : NSData = UIImagePNGRepresentation(myPicUI)! as NSData
 let myPicstrBase64 = myPicNSData.base64EncodedString(options: 
NSData.Base64EncodingOptions.lineLength64Characters)

// Create NSDictionary INSERT record -

let itemToInsert = ["pic" : myPicstrBase64,  "text": text, "complete": 
false, "__createdAt": Date()] as [String : Any]


 UIApplication.shared.isNetworkActivityIndicatorVisible = true
    self.table!.insert(itemToInsert) {
        (item, error) in
        UIApplication.shared.isNetworkActivityIndicatorVisible = false
        if error != nil {
            print("Error: " + (error! as NSError).description)
        }

App Save & Sync Failed: The User entered "text" field value is added and displays in the table view. When attempt to SYNC to AZURE via pull down table screen, the record disappears from the table view. Querying Sql Server ToDoItem table directly, no record inserted.

Test: Mobile Sync Successful when directly using String: "TestString"

let itemToInsert = ["pic" : "TestString",  "text": text, "complete": false, "__createdAt": Date()] as [String : Any]

Thanks for help

回答1:

Success !!

Convert to String: let myPicstrBase64 = myPicNSData.base64EncodedString()

I am using the Free Azure Sql Server DB. The XCode error output window displayed database no space message.

Purge table: Toitems

Hope this helps anyone learning Swift and Azure Mobile Service.

来源：https://stackoverflow.com/questions/49863145/swift-azure-mobile-quickstart-add-and-sync-png-image