I need to do a project with using random color picker from a list to paste in to the Canvas. And when i press Start button (BT_Start). It shows this error. How do I solve it and is there any explanation?
P.S.: the other part of the code may be incorrect.
What error ?
You are setting the variable Color_List to an item from the list Color_List?
Set your random selection to another variable.
I dont understand what you are trying to say
The operation pick random item cannot accept the arguments: , ["Blue.png"]
what it should be like. if im gonna change color_list to a color, it writes:
The operation pick random item cannot accept the arguments: , [0]
It might be you found a bug with the helper blocks
Unfortunately I can't check this currently, because I'm on mobile...
As test, use text blocks together with the image names and let us know, if the pick a random item block then works
Also as already mentioned earlier, you should use another global variable to store the result, for example your variable RandomSelection
Taifun
The first time you click the BT_Start button, Color_List is set to a random item of itself.
| Event | Value of Color_List | Data type |
|---|---|---|
| Screen initializes | ["Red.png", "Green.png", "Blue.png", "Yellow.png"] | List |
| BT_Start clicked for first time | "Blue.png" | Text |
By the second time you click the button, you are instructing App Inventor to pick a random item from a text string!
