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Sample Code of the App Architecture Book
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QUESTION
I am trying to understand the adoption of a DAML smart on sawtooth network. According to this tutorial https://github.com/blockchaintp/daml-on-sawtooth there is:
Sawtooth network which contains:
Rest-api
Validator
Transaction processor
postgres
devmode-engine
That are essential for the network.
- What is the role of daml-rpc and daml-tp? They act as connectors?
For example, a daml user communicates with an api with the daml platform like this image https://docs.daml.com/getting-started/app-architecture.html and after that is adopted from sawtooth network?
- Finally, where is stored the xxx.dar file?
ANSWER
Answered 2020-Oct-01 at 20:47DAML-on-Sawtooth is a specific DAML ledger implementation integrated using a full Sawtooth network deployment. leveraging Sawtooth's validation features for persistence.
The rest-api you see in that repository is actually the Sawtooth REST api used for communicating to the Sawtooth network, and that validator an implementation of Sawtooth validation as part of the commit protocol, and the transaction processor to handle DAML transactions on the Sawtooth network.
The sawtooth-daml-rpc is what implements the DAML Ledger API gRPC services, and this exposes the Ledger API that the application code interacts with. Postgres is used as an underlying index db service supporting the Ledger API.
In the https://docs.daml.com/getting-started/app-architecture.html you can conceptually swap the "Sandbox" box with "Sawtooth Network", as in the DAML-on-Sawtooth case it is the full Sawtooth network which is able to consume and return DAML that is the ledger implementation.
As with all DAML ledgers, the DAR files are uploaded through the package upload gRPC APIs and are persisted on the ledger (in this case the Sawtooth network), as are parties and transactions through the party allocation and transaction submission APIs, respectively.
QUESTION
I see page-based navigation is supported for WatchOS, but is there a way to access this functionality with SwiftUI?
...ANSWER
Answered 2020-Jan-13 at 19:54Yes, this is possible. First, define hosting controllers for each of your pages like so
QUESTION
I'm currently looking into Dark Mode in my App. While Dark Mode itself isn't much of a struggle because of my SwiftUI basis i'm struggling with the option to set the ColorScheme independent of the system ColorScheme.
I found this in apples human interface guidelines and i'd like to implement this feature. (Link: Human Interface Guidelines)
Any idea how to do this in SwiftUI? I found some hints towards @Environment
but no further information on this topic. (Link: Last paragraph)
ANSWER
Answered 2019-Oct-20 at 19:20First you need to access the window to change the app colorScheme that called UserInterfaceStyle
in UIKit
.
I used this in SceneDelegate
:
QUESTION
In watchOS, I'm implementing a Page-based navigation. The page based navigation contains three interface controllers; however, the first interface controller is the one that shows up first. In my scenario, however, I want the second interface controller to load up first and then they can swipe back/forward to see the other controllers. Is there anyway to implement this functionality?
Approaches tried so far:
Attempt: Connect the interface controllers together using a next page
relationship segue and set the Initial interface controller
to the second page.
Result: The second interface controller indeed shows up first; however, the first interface controller is completely ignored and you can't scroll back to it.
...ANSWER
Answered 2019-Feb-11 at 10:51You just have to insert in your second controller a call to becomeCurrentPage()
in the awake
method:
QUESTION
I'm creating an OS background service using procrun (Apache JSVC). I want to use WELD as a container.
The application by itself (gradle run) works fine. I can see desired behaviour. But when I'm trying to run it as a Windows service, I can see following errors:
...ANSWER
Answered 2018-Mar-23 at 08:03Ok,
So the problem here is with the JAR hell, not only with WELD. What I will do is I will start the project from scratch, and I will create uber JAR each time I will add anything dependent to the project. This will show me which part is most problematic, and allows me to track issues more precisely.
QUESTION
I my app I need both Calendar and notifications access. I know this is not the best approach to ask user to accept a bunch of requests on the app's first start, but currently it is not possible to rethink app design. So my question on this stage is - will App Store approve my app if I do these two request one by one on app start? Or will I break some critical Apple guidelines?
Update
Found https://developer.apple.com/ios/human-interface-guidelines/app-architecture/requesting-permission/
It is not clear if my app can be rejected if I make 2 requests at launch though.
...ANSWER
Answered 2018-Feb-20 at 19:23Perhaps you could find a clever way to ask for notifications through a first launch on boarding process.
For example: https://github.com/juanpablofernandez/SwiftyOnboard
QUESTION
In the official Human Interface Guidelines Apple is reference the topic onboarding - a neat interface which only pops up when you open the app for the first time. I‘ve seen this in many apps, yet I can‘t find information on how to implement it. It seems like a standardized interface. Check it out here: https://developer.apple.com/ios/human-interface-guidelines/app-architecture/onboarding/
Can anybody provide some information?
...ANSWER
Answered 2018-Feb-02 at 09:02There are no ready-made components in UIKit specifically for onboarding views. You'll have to roll your own.
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