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swift -从相册中选择照片并上传

选择本地图片并上传是应用开发中一个比较常见的功能。
   技术分享   技术分享

原文出自:www.hangge.com  转载请保留原文链接:http://www.hangge.com/blog/cache/detail_1174.html
我们使用 UIImagePickerController 可以很方便的从系统“照片”中选择图片,但我们会发现选择完毕后,通过图片的 info[UIImagePickerControllerReferenceURL] 得到的是一个引用路径,格式如下:
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assets-library://asset/asset.PNG?id=90B54369-5E79-433D-B74A-E8E0870EAF27&ext=PNG
用这个路径是没法上传文件的。想要把选择的图片上传,通常我们会想到如下两种方式:
 
 
方法一:先将图片保存到一个临时文件夹下,再上传
下面样例在 imagePickerController 选择图片后,使用 fileManager 将其复制保存到应用的文档目录下,再将复制过来的图片上传。
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import UIKit
import Alamofire
 
class ViewControllerUIViewControllerUIImagePickerControllerDelegate,
UINavigationControllerDelegate {
     
    override func viewDidLoad() {
        super.viewDidLoad()
    }
     
    //选取相册
    @IBAction func fromAlbum(sender: AnyObject) {
        //判断设置是否支持图片库
        if UIImagePickerController.isSourceTypeAvailable(.PhotoLibrary){
            //初始化图片控制器
            let picker = UIImagePickerController()
            //设置代理
            picker.delegate = self
            //指定图片控制器类型
            picker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
            //弹出控制器,显示界面
            self.presentViewController(picker, animated: true, completion: {
                () -> Void in
            })
        }else{
            print("读取相册错误")
        }
         
    }
     
    //选择图片成功后代理
    func imagePickerController(picker: UIImagePickerController,
                               didFinishPickingMediaWithInfo info: [String AnyObject]) {
        //获取选择的原图
        let pickedImage = info[UIImagePickerControllerOriginalImageasUIImage
        
        //将选择的图片保存到Document目录下
        let fileManager = NSFileManager.defaultManager()
        let rootPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory,
                                                           .UserDomainMasktrue)[0] as String
        let filePath = "\(rootPath)/pickedimage.jpg"
        let imageData =http://www.mamicode.com/ UIImageJPEGRepresentation(pickedImage, 1.0)
        fileManager.createFileAtPath(filePath, contents: imageData, attributes: nil)
         
        //上传图片
        if (fileManager.fileExistsAtPath(filePath)){
            //取得NSURL
            let imageNSURL:NSURL NSURL.init(fileURLWithPath: filePath)
             
            //使用Alamofire上传
            Alamofire.upload(.POST"http://www.hangge.com/upload.php", file: imageNSURL)
                .responseString { response in
                print("Success: \(response.result.isSuccess)")
                print("Response String: \(response.result.value)")
            }
        }
        
        //图片控制器退出
        picker.dismissViewControllerAnimated(true, completion:nil)
    }
     
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}
不管使用模拟器还是真机调试,运行后可以看到图片上传成功了:
技术分享


方法二:使用PhotoKit获取选择图片的真实路径,再上传
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在这里留下你想说的话。import UIKit
import Alamofire
import Photos
 
class ViewControllerUIViewControllerUIImagePickerControllerDelegate,
UINavigationControllerDelegate {
     
    override func viewDidLoad() {
        super.viewDidLoad()
    }
     
    //选取相册
    @IBAction func fromAlbum(sender: AnyObject) {
        //判断设置是否支持图片库
        if UIImagePickerController.isSourceTypeAvailable(.PhotoLibrary){
            //初始化图片控制器
            let picker = UIImagePickerController()
            //设置代理
            picker.delegate = self
            //指定图片控制器类型
            picker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
            //弹出控制器,显示界面
            self.presentViewController(picker, animated: true, completion: {
                () -> Void in
            })
        }else{
            print("读取相册错误")
        }
         
    }
     
    //选择图片成功后代理
    func imagePickerController(picker: UIImagePickerController,
                               didFinishPickingMediaWithInfo info: [String AnyObject]) {
        //选择图片的引用路径
        let pickedURL:NSURL = info[UIImagePickerControllerReferenceURLasNSURL
        let fetchResult: PHFetchResult PHAsset.fetchAssetsWithALAssetURLs([pickedURL],
                                                                            options: nil)
        let asset: PHAsset = fetchResult.firstObject asPHAsset
         
        PHImageManager.defaultManager()
            .requestImageDataForAsset(asset, options: nil, resultHandler: {
            (imageData: NSData?, dataUTI: String?, orientation: UIImageOrientation,
            info: [NSObject AnyObject]?) in
            //获取实际路径
            let imageNSURL: NSURL = info!["PHImageFileURLKey"asNSURL
            print("路径:",imageNSURL)
            print("文件名:",imageNSURL.lastPathComponent)
             
            //使用Alamofire上传
            Alamofire.upload(.POST"http://www.hangge.com/upload.php", file: imageNSURL)
                .responseString { response in
                print("Success: \(response.result.isSuccess)")
                print("Response String: \(response.result.value)")
            }
        })
  
        //图片控制器退出
        picker.dismissViewControllerAnimated(true, completion:nil)
    }
     
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}
使用模拟器运行后,可以看到图片上传成功了:
技术分享
但如果使用真机调试的话,虽然我们得到了图片的真实路径和文件名,但还是无法上传。所以上传图片还是建议使用方法一。
技术分享

 
 
附录:
(1)本文样例使用 Alamofire 上传文件,对于Alamofire不熟悉的可参考我原来写过的几篇文章:
Swift - HTTP网络操作库Alamofire使用详解1(配置,以及数据请求)
Swift - HTTP网络操作库Alamofire使用详解2(文件上传)
(2)服务端php代码如下:
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<?php
/** php 接收流文件
* @param  String  $file 接收后保存的文件名
* @return boolean
*/
function receiveStreamFile($receiveFile){  
    $streamData = isset($GLOBALS[‘HTTP_RAW_POST_DATA‘])? $GLOBALS[‘HTTP_RAW_POST_DATA‘] : ‘‘;
    
    if(empty($streamData)){
        $streamData file_get_contents(‘php://input‘);
    }
    
    if($streamData!=‘‘){
        $ret file_put_contents($receiveFile$streamData, true);
    }else{
        $ret = false;
    }
   
    return $ret;  
}
  
//定义服务器存储路径和文件名
$receiveFile =  $_SERVER["DOCUMENT_ROOT"]."/uploadFiles/hangge.zip";
$ret = receiveStreamFile($receiveFile);
echo json_encode(array(‘success‘=>(bool)$ret));
?>


原文出自:www.hangge.com  转载请保留原文链接:http://www.hangge.com/blog/cache/detail_1174.html

swift -从相册中选择照片并上传