swift 下拉图片变大 coreData 声明数组变量

1 声明数组变量
（1）
import Foundation
import UIKit

struct News {
var newsTitle: String
var newsCategory: String
}
（2）var newsArray = News
（3）
let news7 = News(newsTitle: “Eclipse mints release new Blackcurrent flavor”, newsCategory: “World”)
let news8 = News(newsTitle: “Aetna and Humana close to multi-billion dollar deal”, newsCategory: “Finance”)
newsArray = [news1, news2, news3, news4, news5, news6, news7, news8]

2 coreData
func applicationWillTerminate(application: UIApplication) {
self.saveContext()
}

// MARK: - Core Data stacklazy var applicationDocumentsDirectory: NSURL = {    let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)    return urls[urls.count-1] as! NSURL}()lazy var managedObjectModel: NSManagedObjectModel = {    let modelURL = NSBundle.mainBundle().URLForResource("Yahoo_News_Digest_Replicate", withExtension: "momd")!    return NSManagedObjectModel(contentsOfURL: modelURL)!}()lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {    var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)    let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("Yahoo_News_Digest_Replicate.sqlite")    var error: NSError? = nil    var failureReason = "There was an error creating or loading the application's saved data."    if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {        coordinator = nil        // Report any error we got.        var dict = [String: AnyObject]()        dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"        dict[NSLocalizedFailureReasonErrorKey] = failureReason        dict[NSUnderlyingErrorKey] = error        error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)        NSLog("Unresolved error \(error), \(error!.userInfo)")        abort() // 断言    }    return coordinator}()lazy var managedObjectContext: NSManagedObjectContext? = {    let coordinator = self.persistentStoreCoordinator    if coordinator == nil {        return nil    }    var managedObjectContext = NSManagedObjectContext()    managedObjectContext.persistentStoreCoordinator = coordinator    return managedObjectContext}()// MARK: - Core Data Saving supportfunc saveContext () {    if let moc = self.managedObjectContext {        var error: NSError? = nil        if moc.hasChanges && !moc.save(&error) {            NSLog("Unresolved error \(error), \(error!.userInfo)")            abort()        }    }}

3 下拉图片变大

func updatingTableHeaderView() {    var newsHeaderTableRect = CGRect(x: 0, y: -kTableHeightHeader, width: self.view.frame.size.width, height: kTableHeightHeader)    if self.newsTableView.contentOffset.y < -kTableHeightHeader {        newsHeaderTableRect.origin.y = self.newsTableView.contentOffset.y        newsHeaderTableRect.size.height = -self.newsTableView.contentOffset.y    }    self.tableHeaderView.frame = newsHeaderTableRect    visiblePortionOfNewsTableHeader(newsHeaderTableRect: newsHeaderTableRect)}func visiblePortionOfNewsTableHeader(#newsHeaderTableRect: CGRect) {    self.tableHeaderMaskToBeVisible = CAShapeLayer()    self.tableHeaderMaskToBeVisible.fillColor = UIColor.blackColor().CGColor    self.tableHeaderView.layer.mask = self.tableHeaderMaskToBeVisible    let trapeziumHeaderMask = UIBezierPath()    trapeziumHeaderMask.moveToPoint(CGPointMake(0, 0))    trapeziumHeaderMask.addLineToPoint(CGPointMake(newsHeaderTableRect.width, 0))    trapeziumHeaderMask.addLineToPoint(CGPointMake(newsHeaderTableRect.width, newsHeaderTableRect.height))    trapeziumHeaderMask.addLineToPoint(CGPointMake(0, newsHeaderTableRect.height - kTableToBeCutOff))    self.tableHeaderMaskToBeVisible.path = trapeziumHeaderMask.CGPath}

4 cell 渐变的出现
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {

    if self.arrayCheckCellHasLoaded[indexPath.row] == false {        cell.alpha = 0        UIView.animateWithDuration(1, animations: { () -> Void in            cell.alpha = 1        });        self.arrayCheckCellHasLoaded[indexPath.row] = true    }}