How to save the CGRect and color objects in CoreData iOS

-
Problem:

 I want to save CGRect for some o my rectangle,Square and other objects.Also i want to save the color object in coreData.If i saved directly in coredata app crashes.



Solution:

 In coredata you may not be able to save the drawing objects and color objects.So follow the steps to solve your problem.

1) Change the coredata attribute type to binary Data

2) Create an NSMutabledictionary.

3) Set integer and double values as NSNumber, Rect as NSValue and color as Data.



                    let dic = NSMutableDictionary.init()
                    dic.setValue(NSValue(cgRect: rect.Button.frame), forKey: "btnframe")
                    dic.setValue(NSNumber(integerLiteral:btn.tag), forKey: "tag")
                    dic.setValue(NSKeyedArchiver.archivedData(withRootObject: color), forKey: "color")


4) Add the dictionary to an array.

5) Then save array to the binarydata using nskeyarchiever like below


       coredata.value = NSKeyedArchiver.archivedData(withRootObject: array) as NSData


6)When retrieve the data from coredata unarchieve the data and get the dictionary values 


Comments

Post a Comment

Popular posts from this blog

Invalid bundle error while upload the app to the app Store

-
Image
Problem:  Invalid bundle. The “ UIInterfaceOrientationLandscap eLeft, UIInterfaceOrientationLandscap eRight, UIInterfaceOrientationPortrait ” orientations were provided for the UISupportedInterfaceOrientatio ns Info.plist key in the com.myapp bundle, but you need to include all of the “ UIInterfaceOrientationPortrait , UIInterfaceOrientationPortrait UpsideDown, UIInterfaceOrientationLandscap eLeft, UIInterfaceOrientationLandscap eRight” orientations to support iPad multitasking. For details, visit:  https://developer.apple.com/ documentation/bundleresources/ information_property_list/ uisupportedinterfaceorientatio ns . (ID: something) Solution: In the above image you have to check the full screen option enabled.If not then enable and upload it will works.
Read more

Convert NsNumber, NSDate to String in iOS Swift

-
Code: String (describing: nsnumbervalue )          (or) String (nsnumbervalue ) The above code is used to convert the NsNumber to String.  NSDate To String String (describing: Date ) Combine NsNumber and string to String Code: String ( " \ ( nsnumbervalue ) km" ) Convert Float to String  Code: String (describing: floatvalue )
Read more

Global LocationManager Singleton class iOS Swift

-
If you are using location based values in all the screen of apps then its a better to implement as a singleton class.First import the core location.The class will be as follows. Code: import UIKit import CoreLocation protocol LocationServiceDelegate {     func tracingLocation(currentLocation: CLLocation )     func tracingLocationDidFailWithError(error: NSError ) } class LocationSingleton: NSObject , CLLocationManagerDelegate {     var locationManager: CLLocationManager ?     var lastLocation: CLLocation ?     var delegate: LocationServiceDelegate ?     static let sharedInstance: LocationSingleton = {         let instance = LocationSingleton ()         return instance     }()          override init () {         super . init ()         self . locationManager = CLLocationManager ()                  guard let locationManagers= self . locationManager else {             return         }                 
Read more