Swift Core Data 图片存储与读取Demo

概述实体的模型定义： 实体的class定义： @objc(ImageEntity)class ImageEntity: NSManagedObject { @NSManaged var imageData: NSData} 存储： @IBAction func saveImageToCoreData() { let delegate = UIApplication.sharedAp

实体的模型定义：

实体的class定义：

@objc(ImageEntity)class ImageEntity: NSManagedobject {    @NSManaged var imageData: NSData}

存储：

@IBAction func saveImagetoCoreData() {    let delegate = UIApplication.sharedApplication().delegate as AppDelegate    let context = delegate.managedobjectContext    let imageData = UIImagePNGRepresentation(UIImage(named: "image"))    let imageEntity = NSEntityDescription.entityForname("ImageEntity",inManagedobjectContext: context!)    let image = ImageEntity(entity: imageEntity!,insertIntoManagedobjectContext: context!)    image.imageData = imageData    var error: NSError?    if context!.save(&error) == false {        println("Failed: \(error!.localizedDescription)")    }}

读取：

@IBAction func loadImageFromCoreData() {    let delegate = UIApplication.sharedApplication().delegate as AppDelegate    let context = delegate.managedobjectContext    let request = NSFetchRequest(entityname: "ImageEntity")    var error: NSError?    let imageEntitIEs = context?.executeFetchRequest(request,error: &error)    let imageEntity = imageEntitIEs?.first! as ImageEntity    self.imageVIEw.image = UIImage(data: imageEntity.imageData)}

Demo地址 总结

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