et dans" set global action" je ne peux pas écrire "globalaction"
Have you tried it like I have shown? Does it work for you ?
Just change it to the block you had then!
that is why it does not work. you are trying to compare two different things (incorrectly)
à quel endroit ?
Learn to work with lists and lists of lists... and understand the difference between a list and a list of lists
Also use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by 
Taifun.
And think about what exactly do you want to store in TinyDB? User and password of only one user or user and password of several users?
Taifun
je veux stocker plusieurs utilisateurs
dans screem1 je veux récupérer l'email et le mot de passe de chaque utilisateur, qui s' est enregistré dans l'autre écran, pour qu'il puisse se connecter à chaque fois qu'il le souhaite
dans screem1 je veux récupérer l'email et le mot de passe de chaque utilisateur, qui s'est enregistré dans l'autre écran, pour qu'il puisse se connecter à chaque fois qu'il le souhaite
@TIMAI2 already provided an example for you
To find out what you are doing wrong, use the Do it debugging feature as already mentioned earlier...
Taifun
c'est en anglais et je ne peux pas traduire
Please upload your aia project, then maybe we can see what you are doing, and fix it
(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.
je suis désolé mais je n'y arrive pas
Try with these blocks in Screen1:
Here is a revised aia project. I have resized your large images...
MAMconnect_revised.aia (929.3 KB)
[EDIT - sorry I got the list selection logic wrong]
As mentioned above, you have 20 screens, this may work, or may cause your app to crash.
Use different screens wisely
- Before starting to create another screen, first you should think about is it really necessary?
- See also Building apps with many screens and SteveJG's post about advantages/disadvantages, because in only one screen you also can use vertical arrangements to simulate different screens, just set the arrangements to visible = true/false as needed...
- See also Martyn_HK's example about how to use Tabs in App Inventor and another example from Cyd. and my Tabbed Screens Demo
If you decided to use different screens, then you should switch them correctly, else you will run out of memory after a while...
The recommended method of switching screens in App Inventor
(Thanks Taifun)
Also see demo: multiscreen.aia
Also see Nested Screens
OUI je sais pour les écrans il faut que je me penche sur les écrans virtuels car je ne sais pas comment on fait, mais pour le moment il faut que je règle le problème de l'écran1
voilà les blocs (par contre je n'ai pas le même bloc vert que le votre), et j'ai toujours le message d'erreur. Peut on faire une autre formule sans les listes ?
par contre je l'ai essayé avec ma version de l'application