In iOS 4. Although not all apps need printing support, it is often a useful feature if your app is used for creating content such as a word processor or a drawing programmaking purchases printing order confirmationsand other tasks where the user might reasonably want a permanent record. This chapter explains how to add printing support to your app. At a high level, your app creates a print job, providing either an array of ready-to-print images and PDF documents, a single image or PDF document, an instance of any of the built-in print formatter classes, or a custom page renderer.
To print, users tap a button that is usually in a navigation bar or toolbar that is associated with the view or selected item the user wants to print. The app then presents a view of printing options. The user selects a printer and various options and then requests printing.
The app is asked to generate printing output from its content or provide printable data or file URLs. The requested print job is spooled and control returns to the app. If the destination printer is currently not busy, printing begins immediately.
If the printer is already printing or if there are jobs before it in the queue, the print job remains in the iOS print queue until it moves to the top of queue and is printed. The first thing a user sees related to printing is a print button.
The print button is often a bar-button item on a navigation bar or a toolbar. The print button should logically apply to the content the app is presenting; if the user taps the button, the app should print that content.
Although the print button can be any custom button, it is recommended that you use the system item-action button shown in Figure When a user taps the print button, a controller object of the app receives the action message.
The controller responds by preparing for printing and displaying the printer-options view. The options always include the destination printer selected from a list of discoverable printersthe number of copies, and sometimes the range of pages to print. If the selected printer is capable of duplex printing, users can choose single-sided or double-sided output. If users decide not to print, they tap outside the options view on iPad or tap the Cancel button on iPhone and iPod touch to dismiss the printer-options view.
The kind of user interface shown depends on the device. On iPhone and iPod touch devices, UIKit displays a sheet of printing options that an app can animate to slide up from the bottom of the screen, as shown in Figure Once a print job has been submitted and is either printing or waiting in the print queue, users can check on its status by double-tapping the Home button to access the Print Center in the multitasking UI.
The Print Center shown in Figure is a background system app that shows the order of jobs in the print queue, including those that are currently printing.
It is only available while a print job is in progress. Users can tap a print job in the Print Center to get detailed information about it Figure and cancel jobs that are printing or waiting in the queue. An app uses the UIKit printing API to assemble the elements of a print job, including the content to print and information related to the print job.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.
Work fast with our official CLI. Learn more. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. It provides all the same functionality as a "regular" 3D printer, however its 3D printing is virtual. The Printer Simulator also acts as a reference implementation for printer firmware designers.
The LCD screenwhich mimics a printer display. The logwhich reports printer activity, debug messages sent to Forge cloud services, and the storage state of the printer token, registration state, etc. New Token - Completely resets the printer state and issues a new printer ID. Members who had registered to use the printer need to re-register as if it were a different printer.
Get Token - Returns the locally stored token. Re-registration is not required; the printer ID remains unchanged. Online - The Printer Simulator sends regular messages health checks to the Forge server notifying it of its status.
Print jobs and commands can be sent to the Printer Simulator. Offline - The Printer Simulator does not communicate with the Forge server. No print jobs or commands can be sent to the Printer Simulator. Resume - Resume printing a paused print job: Only active if the Printer Simulator is "printing" a print job and the pause button was pressed.
The Printer Simulator will send a status check message to the Forge server, saying it has resumed printing. Pause - Pause printing an active print job: Only active if the Printer Simulator is "printing" a print job. The Printer Simulator will send a status check message to the Forge server saying that it has paused.
Cancel - Cancel printing an active print job: Only active if the Printer Simulator is "printing" a print job. Local - Start printing a virtual print job on the Printer Simulator. This print job is "locally initiated" and not sent by an app. If the printer is online it will notify the Forge server of the local print job, and apps can send commands to the Printer Simulator that affect the print job.
Calling the Printer Simulator from an App All the endpoint calls shown below are documented in the Forge developer portal. The Printer Simulator actively listens for registration events. If the printer is sending health checks regularly, it will appear as online. You can stop the printer from sending health checks by clicking the Offline button.
This will return the current status of the job. This endpoint is asynchronous and initiates a command task that runs in the background, rather than halting execution of your program. The layers will stop or resume processing on the Printer Simulator depending on the command sent. Note that you can also trigger pause, resume, and cancel from the Print Simulator UI.I try again. Same error. Try again. Googling around I can tell that I am not alone.
So if you are in a similar situation and for some reason need to download new iOS simulators outside of the normal XCode download process, here is how you do it. These steps worked for me, on my machine, but your results may vary and Apple may change things tomorrow and break this whole process. So good luck. The first thing you have to do is find the file that you need to download. Click the down arrow next to the simulator you want to download to begin the normal download process. In this example, I am downloading the iOS 9.
Now open up your Console. Once you are sure the simulator download has started in XCode, cancel it.
Drawing and Printing Guide for iOS
When the download is cancelled, a new log will appear in Console with the url of the file that was being downloaded. This is the url for the file you want to manually download. For my iOS 9. Now that you have the url of the file, you can download it however you like. I chose to do it through Safari so I could easily see the progress and resume the download if needed. So I typed the url into the Safari address bar, pressed enter, and watched the bytes start flowing in.
You can just as easily download the file using curl on the command line. Thanks to Google translate and some nice Chinese speaking personI was able to figure out the next step. You need to locate the XCode cache directory on your computer. Make sure you have not changed the filename of the downloaded dmg file. It needs to match the filename of what appears in the original download url.
Now we need to tell XCode that the file is ready to install. Click the download arrow next the simulator you are installing and you should see the progress bar move a lot faster this time. XCode is now using the manually downloaded file instead of downloading a new file from the Apple servers.
If you are looking for help with a digital project, check out our company Cullaboration Media. We also help mobile apps with user engagement and feedback through our User Hook service. Never email CSV templates again. Visit NordVPN. Subscribe to get your daily round-up of top tech stories!What is AirPrint? Why do I need it? Yeah well, when you have content that the user might need to print.
Apple has created various APIs for doing all the hard work for you and most modern printers have AirPrint support which you can take advantage of. Follow through this blog for details on the implementation. Before we implement printing in the code, Apple provides a tool for testing how printing works on paper without you having to get a printer or waste paper on it. This is provided as a printer simulator for Xcode.
So as the first step, lets enable the iOS printer simulator. Running the Printer Simulator looks like this. To begin with, we need to know what is the type of content that you want to print.Xcode tutorial for beginners (#3 – Run the app in a Simulator)
NOTE: If you notice a yellow border it is nothing but indicator of printable area on the paper. You can also set a location for saving the printed pages.
Select and download the appropriate package. Install the downloaded package. Run Printer Simulator app. Implementing code in your iOS application To begin with, we need to know what is the type of content that you want to print.
If nothing happens, download the GitHub extension for Visual Studio and try again. At the time of writing this, the simulator in itself fits in lines of Python code as reported by sloccount. Most of the non-trivial things come from Printrun's gcoder and gcview modules, which respectively provide gcode parsing and the 3D viewer. Once this is done, you will just need to rerun the second command to update Printrun to the latest version when you want to.
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Manually Install iOS Simulators in XCode
I remember on Xcode 5 the simulator has a button called "Open Printer Simulator" locate in File menu but now it is gone. I think its not coming with default Xcode package.
You have to install it separately. Learn more. Where is printer simulator in Xcode 6 Ask Question. Asked 6 years ago. Active 3 years, 11 months ago. Viewed 11k times. How can I test printer on the simulator?
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In Xcode, in the Downloads section, start the Simulator download again, it should find the file you downloaded and install it. Look at this snapshot to understand flow of above steps:. Look at this snapshot:. So a quick tip for the people who use a download manager to download the. Once you place the file inside the 'Downloads' folder, Copy and paste the url somewhere and copy the file name alone.
I wasted 2 to 3 hours trying to figure this out. The problem is that the filename looks exactly the same.
But there was an extra space somewhere. Another Tip: Also to get the download url - open system console. Make sure all messages are selected and search for xcode inside the Search box. Go to xcode simulator download screen, start and stop the download for the simulator you want and check inside console log. You should find the url there. You can't download the simulators package directly. Instead, you can download the xcodes from developer. Often, what it takes with Xcode is a good 'ol fashioned restart.
This didn't work for me, so I restarted my MacBook Pro. Now it works :. Learn more. Download Xcode simulator directly Ask Question. Asked 5 years, 7 months ago. Active 4 months ago.