data-transfer | 易学教程

JSON Syntax: Transmitting an array

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问题 A valid JSON Syntax is something of the kind: { "username": "admin", "password": "123" } But what if I want to transmit an array of 'users' ( given the example ), instead of a single 'user' ? Is the code below Valid JSON, according to the specifications? [{ "username": "admin", "password": "123" }, { "username": "bbvb", "password": "sdfsdf" }, { "username": "asd", "password": "222" }] And if not, what is the best way to transmit an array of values across with JSON? ( And with 'best way', I

dataTransfer is null when creating drag event programmatically

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问题 I am trying to create a dragEvent and fire it programmatically using this code on Chrome: var ev = document.createEvent("MouseEvents"); ev.initEvent("dragstart"); and then fire it this way: element.dispatchEvent(ev); The element has draggable attribute. The event was dispatched successfully. However on the event being fired - the dataTransfer object is null. Even when I try to set it manually to a working dataTransfer object - it still stays null. Any ideas? Thanks 回答1: Unfortunately, it

Data transfering from iPhone to iWatch with Watch connectivity framework [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . I want to ask a question about watch connectivity. 1) Is it possible to read data from iPhone when the iWatch app opened. I not want to wait to open iPhone app for transfering data to iWatch. 2) Is it possible to create login screen(to get user input from text fields) on iWatch 3)

Reading iPhone files from PC / Mac programmatically

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问题 Applications like iPhone Explorer can show the contents for each installed iPhone application on Mac OS X (even on non-jailbroken devices) when iPhone is connected using USB-cable. I'm trying to do something similar, programmatically copy some files from my iPhone app's folder. I have done some experiments with open-source frameworks/products built to use iTunes-framework, like iPhoneBrowser and MobileDevice Library. I can connect to iPhone, now the problem is how to enumerate Apps folder

How to pass custom class instances through Web-Workers?

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问题 Since Web-Worker JSON serialize data between threads, something like this doesn't work: worker.js function Animal() {} Animal.prototype.foobar = function() {} self.onmessage = function(e) { self.postMessage({animal: new Animal()}) } main.js let worker = new Worker('worker.js') worker.onmessage = function(e) { console.log(e.data) } worker.postMessage('go!') The outcome would be a simple object with the loss of the foobar prototype method. Is it possible to transfer the custom object back to

Reading iPhone files from PC / Mac programmatically

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Applications like iPhone Explorer can show the contents for each installed iPhone application on Mac OS X (even on non-jailbroken devices) when iPhone is connected using USB-cable. I'm trying to do something similar, programmatically copy some files from my iPhone app's folder. I have done some experiments with open-source frameworks/products built to use iTunes-framework, like iPhoneBrowser and MobileDevice Library. I can connect to iPhone, now the problem is how to enumerate Apps folder items? iPhoneBrowser or MobileDevice Library don't support or provide any easy way for that. Even when

How to pass custom class instances through Web-Workers?

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Since Web-Worker JSON serialize data between threads, something like this doesn't work: worker.js function Animal() {} Animal.prototype.foobar = function() {} self.onmessage = function(e) { self.postMessage({animal: new Animal()}) } main.js let worker = new Worker('worker.js') worker.onmessage = function(e) { console.log(e.data) } worker.postMessage('go!') The outcome would be a simple object with the loss of the foobar prototype method. Is it possible to transfer the custom object back to the main thread without losing its prototype methods? Like, would this be possible with ArrayBuffer ? I'm

How to secure traffic between iOS-app and server?

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I am building an app which gets JSON-encoded data from a web server. Right now, anyone can access the server-script that gets the data, and potentially access sensitive data. So, what is the best way to ensure that the app is what's getting the data, and secure the traffic between the server and app? The server-script is PHP. Thank you. You should use nonces Here's a great tutorial on how to generate an MD5 hash in C: http://www.saobart.com/md5-has-in-objective-c/ So, what is the best way to ensure that the app is what's getting the data In general, you can't. The best you can do is use some

What is the easiest way to transfer Oracle database from one PC to another?

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问题 i want to transfer my oracle database to another PC. What is the easiest way to do it? Are there any GUI tools to do it? 回答1: APC's answer is the way to go for a logical transfer. If you're asking because you just want a one-time transfer to another PC then: install the same version of Oracle on the second PC create the same directory structure for the database files on the second PC copy the database files (tablespace files, control files, redo logs) to the second PC (with the database shut

Take picture with iPhone API and transfer it to a server

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问题 I have written an cocoa application to take a picture on the iPhone. I need to transfer the images taken to somewhere besides the iPhone namely another server. Does anyone know how I can accomplish this? Thanks, Joe 回答1: First get a server and figure out what kind of phone <---> server API you want to use. There are any number of ways it can work. A simple and common scheme is a REST API with photos being uploaded via HTTP POST. The basic scheme would be something like: Take picture Convert