November 2024
Intermediate to advanced
1256 pages
39h 14m
French
Content preview from Programmation iOS 14
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Chapitre 11. Texte
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Dessiner du texte dans l'interface de ton application est l'une des choses les plus complexes et les plus puissantes qu'iOS fait pour toi. Tout ce dont tu as besoin, c'est d'un texte à dessiner, et éventuellement d'un objet d'interface pour le dessiner pour toi.
Le texte qui apparaîtra dans l'interface de ton application sera une NSString (pontée à partir de Swift String) ou une NSAttributedString. NSAttributedString ajoute un style de texte à un NSString, y compris des séries de différents styles de caractères, ainsi que des caractéristiques au niveau du paragraphe telles que l'alignement, l'interligne et les marges.
Pour que ta NSString ou ta NSAttributedString apparaisse dans l'interface, tu peux la confier à un objet de l'interface qui sait comment la dessiner, ou tu peux la dessiner toi-même dans un contexte graphique :
- Objets de l'interface de dessin de texte
-
Les objets d'interface qui savent comment dessiner une NSString ou une NSAttributedString sont :
- UILabel
-
Affiche du texte, éventuellement composé de plusieurs lignes ; il n'est ni défilable ni modifiable.
- UITextField
-
Affiche une seule ligne de texte modifiable.
- UITextView
-
Affiche un texte sur plusieurs lignes ; il peut être défilant et modifiable.
- Texte à dessiner soi-même
-
NSString et NSAttributedString ont toutes deux des méthodes pour se dessiner dans n'importe ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.