Ios download file from ble
These are slightly advanced concepts but in simpler terms, Swift has these design patterns where the timing of the function calls are defined but their behaviours are not.
Hence the behaviour of these functions must be defined. For example, CBCentralManager can tell you that it has connected to a peripheral but what happens on connection needs be defined by you. Similarly, if there is a disconnection, what should the central manager object do…ignore or try to re-establish a connection? This is because some of the methods of these protocols definitely need to be defined while others are optional. If you click on the red circle showing the error, as follows, there should be a little Fix button.
This method is an absolute requirement because it gets called whenever you define a CBCentralManager. It is used to check the hardware status of Bluetooth on your device i. We also want to declare a variable for our central device so we can refer to it later. Within the class add the following:. The exclamation mark at the end means this is an unwrapped optional variable and if we refer to it later we can check for null-safety.
We also want to declare a variable for our peripheral object once we establish a connection, so add the following line. In the viewDidLoad function, add the following line to initialize the centralManager variable:.
Now in order of sequence, after viewDidLoad is called and our centralManager is initialized, the delegate method centralManagerDidUpdateState will be called. They are:. Your app can have different alerts for the different statuses but invariably you need to have the state as poweredOn in order to continue.
To check for that, within the centralManagerDidUpdateStatus method, check the central state as following:. Note that I have added print statements to show the status in the debug window. Compile this code and run on your device. TheBlueApp[] [access] This app has crashed because it attempted to access privacy-sensitive data without a usage description.
This is the message that is displayed to the user when asking for Bluetooth permission for the app. If we are designing for apps to be used on phones with iOS13 and previous versions as well then it makes sense to define values for both of these keys. This needs to be done in the Info. Go to the Info. Something that tells your users what the app uses Bluetooth for. I have entered the following. This time select Privacy — Bluetooth Peripheral Usage Description and enter the same message for the value of this key.
Now build and run the app again by clicking the little play button on the top toolbar. Your phone will show a notification asking for permission for TheBlueApp to use Bluetooth.
If all goes well, your debug area will show the text BLE powered on our print statement. Feel free to experiment with different states to see how the phone responds to different settings. You will then be able to transfer files from Mac to your iPhone easily.
Step 4: Make sure the device is discoverable. In case there are no devices available, make them discoverable. Make your device discoverable by selecting "Discoverable" the Settings tab under the Bluetooth preferences pane. It is important to pair your Mac with iPhone, or a Bluetooth-enabled device, so you have the permission to transfer files.
Now, follow the guide below and learn how to transfer files from Mac to iPhone via Bluetooth. Step 2: Now, select the device you want to send the file to in the list. If your device and computer are not paired, make sure they are paired. Once the devices are paired, you can send files to the paired device easily. Step 3: After successfully pairing the devices, keep the Bluetooth on device "ON". Now "Browse Files" on Device and select it to transfer via Bluetooth.
Step 4: Choose "Mac" or your device name from the device listed in the Bluetooth search menu and initiate the file transfer process. A window will appear on your computer system showing the progress of file transfer, as shown below. If you use the Bluetooth file exchange application on your Mac, files will be received and sent with the application. Some files cannot be directly transferred from your iPhone to Mac; you need supporting applications to make their transfer via Bluetooth.
You have absolute control over the files sent to your computer via Bluetooth devices. You can control what your computer does with the files sent. You have the option to accept or refuse the files; you can also decide on which folder you want to place the files and which folder other devices can browse.
While using Bluetooth connectivity on your Mac, you need to pay attention to certain things so that you can get the desired result every time you make a Bluetooth transfer. If your Bluetooth does not work, or you do not want to use it. I highly recommend you this iPhone transferring tool: dr. First, let's take an overview of this software. There is an easier and safer method to transfer iPhone files in 3 steps. First, you can download and install dr. Step 1. Launch the iPhone transfer tool.
After download and install the phone transfer tool on your Mac, run the program. Post as a guest Name. Email Required, but never shown. The Overflow Blog.
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