ZYQAssetPickerController的使用，不错的图片选择

import UIKit

class ViewController: UIViewController,ZYQAssetPickerControllerDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate{

var imageArray  = NSMutableArray()

let moreThan:Int = 8

@IBAction func chooseBtn(sender: UIButton) {

let picker = ZYQAssetPickerController()

picker.maximumNumberOfSelection = self.moreThan+1-self.imageArray.count

picker.assetsFilter = ALAssetsFilter.allPhotos()

picker.showEmptyGroups = false

picker.delegate = self

picker.selectionFilter = NSPredicate(block: { (evaluatedObject, bindings) -> Bool in

let a = evaluatedObject as! ALAsset

a.valueForProperty(ALAssetPropertyType)

if(a.isEqual(ALAssetTypeVideo) == true){

let b = a.valueForProperty(ALAssetPropertyDuration).doubleValue

return b >= 5;

}else{

return true

}

})

self.presentViewController(picker, animated: true, completion: nil)

}

func assetPickerController(picker: ZYQAssetPickerController!, didFinishPickingAssets assets: [AnyObject]!) {

dispatch_async(dispatch_get_global_queue(0, 0)) { () -> Void in

if(self.imageArray.count+assets.count-1>=self.moreThan){

self.imageArray.removeLastObject()

}

for i in 0..<assets.count {

let  ass = assets[i] as! ALAsset

let  ass1 = ass.defaultRepresentation()

let  ass2 = ass1.fullScreenImage().takeUnretainedValue()

let image = UIImage(CGImage:ass2)

let data = UIImageJPEGRepresentation(image, 0.1);

self.imageArray.insertObject(data!, atIndex: 0)

}

dispatch_async(dispatch_get_main_queue(), { () -> Void in

})

}

}

override func viewDidLoad() {

super.viewDidLoad()

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

}

}