保存数据

新建Entity

代码实现

import UIKit
import CoreData

class ViewController: UIViewController {

override func viewDidLoad(){
    super.viewDidLoad()

    let context = (UIApplication.sharedApplication()
        .delegate as! AppDelegate)
        .managedObjectContext


    let row:AnyObject = NSEntityDescription.insertNewObjectForEntityForName("Users", inManagedObjectContext: context)

    row.setValue("jikexueyuan", forKey: "name")
    row.setValue(1, forKey: "age")

    do{
     try context.save()
    }catch{
    print(error)
    }

}
}

注意要导入CoreData
这样赋值只能是单个数据，如果要添加多条数据，需要循环

打印数据文件路径

AppDelegate

lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {

    let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
    let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("SingleViewCoreData.sqlite")
    print(url)
    ......

//Result
file:///Users/jackliu/Library/Developer/CoreSimulator/Devices/A2C2C116-004D-4A10-95F0-654B4D89D1EB/data/Containers
/Data/Application/F3D3A90B-A29D-42C9-A699-3FC44EF0D2CA/Documents/

Application Sqlitebrowser

读取数据

配置环境

import UIKit
import CoreData

class UsersTableViewController: UITableViewController {

    var dataArr:Array<AnyObject> = []
    var context:NSManagedObjectContext!

override func viewDidLoad() {
        super.viewDidLoad()

    context = (UIApplication.sharedApplication()
                .delegate as! AppDelegate)
                .managedObjectContext

            refreshData()
    }

从sqlite数据库中读取

func refreshData(){ 

let f = NSFetchRequest(entityName: "Users")

do{
try dataArr = context.executeFetchRequest(f)
}catch{
print(error)
}
tableView.reloadData()
}

KV取值配置Cell

override func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)as UITableViewCell

    let label = cell.viewWithTag(2) as! UILabel

    let name: AnyObject! = dataArr[indexPath.row].valueForKey("name")
    let age: AnyObject! = dataArr[indexPath.row].valueForKey("age")

    label.text =  "name:\(name),age:\(age)"
    return cell
}

viewWithTag( )

通过标签找到子视图

let label = cell.viewWithTag(2) as! UILabel

点击Cell跳转视图

override func tableView(tableView: UITableView,didSelectRowAtIndexPath indexPath: NSIndexPath) {

    let data = dataArr[indexPath.row] as! NSManagedObject

    let vc = storyboard!.instantiateViewControllerWithIdentifier("UserContent")as! UserContentViewController

    vc.data = data

    presentViewController(vc, animated: true, completion: nil)

}

视图跳转 - StoryboardId

let vc = storyboard!.instantiateViewControllerWithIdentifier("UserContent")as! UserContentViewController

vc.data = data

presentViewController(vc, animated: true, completion: nil)

返回到tableView视图时

override func viewWillAppear(animated: Bool) {
    refreshData()
}

func refreshData(){ 

let f = NSFetchRequest(entityName: "Users")

do{
try dataArr = context.executeFetchRequest(f)
}catch{
print(error)
}
tableView.reloadData()
}

删除数据

override func tableView(tableView: UITableView,canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {

    return true
}


override func tableView(tableView: UITableView,commitEditingStyle editingStyle: UITableViewCellEditingStyle,forRowAtIndexPath indexPath: NSIndexPath) {
    if editingStyle == .Delete {

        //从数据库删除
        context.deleteObject(dataArr[indexPath.row] as! NSManagedObject)

        //存档
        do {
          try context.save()
        } catch _ {
        }

        //刷新
        refreshData()

    } else if editingStyle == .Insert {

    }    
}

接收到传递过来的CoreData数据

UserContentViewController

取值

var data:NSManagedObject!

tfName.text = data.valueForKey("name") as? String        
let age: AnyObject! = data.valueForKey("age")
tfAge.text = "\(age)"

赋值存档

data.setValue(tfName.text, forKey: "name")
data.setValue(Int(tfAge.text!), forKey: "age")

do{
    try data.managedObjectContext!.save()
}catch{
    print(error)
}