Question

  List<Location> locations = SAXXMLParsertest.parse("Your xml data");

    if (locations != null && locations.size() > 0) {

        for (int i = 0; i < locations.size(); i++) {

            Log.e("Location name", " " + locations.get(i).getLocationName());
            Log.e("Location Id", " " + locations.get(i).getLocationID());
            Log.e("Photo Uri", " " + locations.get(i).getPhotoURL());

        }
    }

无法分配二元运算符'+'

Answer 1

＆＃34; dataArray＆＃34;声明？

是[AnyObject]还是[Double]

如果是前者，您需要使用以下方法将其强制转换为：

guard let price = totalPrice as? Double else { continue }
money = money + totalPrice

Answer 2

totalPrice是Double的类型。我认为应该有某种类型的NSDecimalNumber不是你的类型？

此外，当您处理货币数据时，请检查Double。 $mask = 210;会丢失很多数字。

Answer 3

问题是您的 dataArray 是 AnyObject 类型的数组。如果它真的包含双精度数，你可以像这样迭代：

> myapp-front@1.0.0 start /home/pln/dev/myprojects/myprojects/myapp-front
> concurrent "npm run tsc:w" "npm run lite" 

[0] 
[0] > myapp-front@1.0.0 tsc:w /home/pln/dev/myprojects/myprojects/myapp-front
[0] > tsc -w
[0] 
[1] 
[1] > myapp-front@1.0.0 lite /home/pln/dev/myprojects/myprojects/myapp-front
[1] > lite-server
[1] 
[1] [BS] Access URLs:
[1]  -------------------------------------
[1]        Local: http://localhost:3000
[1]     External: http://192.168.0.47:3000
[1]  -------------------------------------
[1]           UI: http://localhost:3001
[1]  UI External: http://192.168.0.47:3001
[1]  -------------------------------------
[1] [BS] Serving files from: ./
[1] [BS] Watching files...
[0] 09:04:01 - Compilation complete. Watching for file changes.
[1] [BS] File changed: app/app.component.js
[1] [BS] File changed: app/boot.js
[1] events.js:85
[1]       throw er; // Unhandled 'error' event
[1]             ^
[1] Error: watch ENOSPC
[1]     at exports._errnoException (util.js:746:11)
[1]     at FSWatcher.start (fs.js:1172:11)
[1]     at Object.fs.watch (fs.js:1198:11)
[1]     at createFsWatchInstance (/home/pln/dev/myprojects/myprojects/myapp-front/node_modules/lite-server/node_modules/browser-sync/node_modules/chokidar/lib/nodefs-handler.js:37:15)
[1]     at setFsWatchListener (/home/pln/dev/myprojects/myprojects/myapp-front/node_modules/lite-server/node_modules/browser-sync/node_modules/chokidar/lib/nodefs-handler.js:80:15)
[1]     at FSWatcher.NodeFsHandler._watchWithNodeFs (/home/pln/dev/myprojects/myprojects/myapp-front/node_modules/lite-server/node_modules/browser-sync/node_modules/chokidar/lib/nodefs-handler.js:228:14)
[1]     at FSWatcher.NodeFsHandler._handleFile (/home/pln/dev/myprojects/myprojects/myapp-front/node_modules/lite-server/node_modules/browser-sync/node_modules/chokidar/lib/nodefs-handler.js:255:21)
[1]     at FSWatcher.<anonymous> (/home/pln/dev/myprojects/myprojects/myapp-front/node_modules/lite-server/node_modules/browser-sync/node_modules/chokidar/lib/nodefs-handler.js:473:21)
[1]     at FSReqWrap.oncomplete (fs.js:95:15)
[1] 
[1] npm
[1]  
[1] ERR!
[1]  Linux 3.16.0-56-generic
[1] npm
[1]  ERR! argv "/usr/bin/node" "/usr/bin/npm" "run" "lite"
[1] npm ERR! node
[1]  v0.12.9
[1] npm ERR! npm 
[1]  v2.14.9
[1] npm
[1]  ERR! code ELIFECYCLE
[1] npm 
[1] ERR! myapp-front@1.0.0 lite: `lite-server`
[1] npm 
[1] ERR! Exit status 1
[1] npm
[1]  ERR! 
[1] npm
[1]  ERR!
[1]  Failed at the myapp-front@1.0.0 lite script 'lite-server'.
[1] npm ERR! This is most likely a problem with the myapp-front package,
[1] npm ERR! not with npm itself.
[1] npm ERR! Tell the author that this fails on your system:
[1] npm ERR!     lite-server
[1] npm ERR! You can get their info via:
[1] npm ERR!     npm owner ls myapp-front
[1] npm ERR!
[1]  There is likely additional logging output above.
[1] 
[1] npm ERR! Please include the following file with any support request:
[1] npm 
[1] ERR!     /home/pln/dev/myprojects/myprojects/myapp-front/npm-debug.log
[1] npm run lite exited with code 1

二进制运算符'+'不能应用于'Double'和'Element'类型的操作数（又名'AnyObject'）

3 个答案: