I m looking but no luck so far

Added: Avery Shafer - Date: 28.09.2021 12:21 - Views: 24386 - Clicks: 1712

I am trying to get myself going with swiftUI.

I m looking but no luck so far

I was playing with the code below and trying to get the print to work to see some variables during runtime in the preview window. Unfortunately it won't run once I add the printI get an Expected Declaration flag. Any info on using print would be great as I have spent a few hours wondering around Google looking for answers with no luck so far.

I m looking but no luck so far

In SwiftUI, views are created inside the definition of a structure and then initialized when an instance is created from that definition, therefore, you can't execute code anywhere you want, you can only do it from inside the structure's methods or closures. For instance, if you look at your code, you tried to call the print function in the place were the properties of the structure and its methods are defined. This is not allowed. If you want to execute code when the instance of that structure is created, you have to define the structure's initializer:.

The body property is a computed property which value is defined by a closure, so you can use print inside that closure. The problem is that closures know what value to return when they only have one statement, but if there are more than one statement, you have to specify what should be returned with the return keyword. In the following example I print a message but I specify that I want the Text view to be the value returned by the closure.

I m looking but no luck so far

I'm still not sure how those closures work, but they are expected to return a list of other views, so you can't call the print function from there. If you want to print a value after a view was created, you can use the onAppear modifier: This modifier applies to any view. Honestly, print works well anywhere a closure or function is accepted by a View.

I m looking but no luck so far

You can use the event triggers to embed print functions if you really need them, though it might be simpler to use the debugger and break points to explore data during the run state. Search by keywords or tags Submit Search Clear search query Additional information about Search by keywords or tags Supported Searches:.

I m looking but no luck so far

Using print. Click again to start watching. Asked by SV Copy to clipboard Share this post. Copied to Clipboard. Add a Comment. Accepted Answer. Posted by macrojd. Post marked as solved. In side of the top level of Views only certain calls are allowed.

I m looking but no luck so far

ForEach buttons. Posted by epvisual. Thank you. I think I have a better understanding now. Posted by SV

I m looking but no luck so far I m looking but no luck so far

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