Swift - Strings - Versionsgeschichte

134.3.86.14: /* Data Objekte in Strings umwandeln */

2023-01-19T10:55:50Z

Data Objekte in Strings umwandeln

134.3.86.14 am 19. Januar 2023 um 10:53 Uhr

2023-01-19T10:53:58Z

134.3.86.14: /* Strings formatieren mit String(format:) */

2023-01-19T10:53:36Z

Strings formatieren mit String(format:)

134.3.86.14: /* Data Objekte in Strings umwandeln */

2023-01-19T10:45:21Z

Data Objekte in Strings umwandeln

134.3.86.14 am 19. Januar 2023 um 10:44 Uhr

2023-01-19T10:44:42Z

134.3.86.14: /* String - Snippets */

2023-01-04T08:35:47Z

String - Snippets

134.3.86.14: /* String - Snippets */

2023-01-04T08:33:15Z

String - Snippets

134.3.86.14: /* Links */

2023-01-04T08:31:27Z

Links

134.3.86.14: Die Seite wurde neu angelegt: „== Links == Swift Programmiersprache == String - Snippets == === String(format:) === The String(format:) initializer is used to create a new string by fo…“

2023-01-04T08:31:10Z

Die Seite wurde neu angelegt: „== Links == Swift Programmiersprache == String - Snippets == === String(format:) === The String(format:) initializer is used to create a new string by fo…“

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== Links ==
[[Swift Programmiersprache]]

== String - Snippets ==
=== String(format:) ===
The String(format:) initializer is used to create a new string by formatting a set of variables using a format string.

The format string is a string that contains placeholders for the variables that you want to insert into the string. These placeholders are represented using special syntax, such as %d for integers, %f for floating point numbers, and %@ for objects.

For example, the following code creates a string that contains a placeholder for an integer value:
<syntaxhighlight lang="Swift">
let value = 42
let string = String(format: "The value is %d", value)
print(string) // Output: "The value is 42"
</syntaxhighlight>
In this example, the %d placeholder in the format string is replaced with the value of the value variable, which is 42. The resulting string is then printed to the console.

You can use multiple placeholders in the format string to include multiple variables in the string. For example:
<syntaxhighlight lang="Swift">
let name = "Alice"
let age = 30
let string = String(format: "%@ is %d years old", name, age)
print(string) // Output: "Alice is 30 years old"
</syntaxhighlight>

In this example, the %@ placeholder is replaced with the value of the name variable, and the %d placeholder is replaced with the value of the age variable. The resulting string is then printed to the console.

← Nächstältere Version		Version vom 19. Januar 2023, 10:55 Uhr
Zeile 32:		Zeile 32:

	=== Data Objekte in Strings umwandeln ===		=== Data Objekte in Strings umwandeln ===
		+	Data Objekte kann man oft nicht direkt verwenden (z.B. beim JSON Decoding) Deshalb muss man sie manchmal erst umwandeln.

	<syntaxhighlight lang="swift">		<syntaxhighlight lang="swift">

@@ Zeile 29: / Zeile 29: @@
 let value: Float = 3.14159265
 let formattedString = String(format: "%.2f", value)
-<syntaxhighlight>
+</syntaxhighlight>
 === Data Objekte in Strings umwandeln ===
 <syntaxhighlight lang="swift">
 if let safeData = data { // Optional Binding = Safety Belt für Optionals

@@ Zeile 33: / Zeile 33: @@
 === Data Objekte in Strings umwandeln ===
 <syntaxhighlight lang="swift">
-if let safeData = data { // Safety Belt für Optionals
+if let safeData = data { // Optional Binding = Safety Belt für Optionals
    let dataString = String(data: safeData, encoding: .utf8) // String aus Datenobjekt
    print("received data: \(String(describing: dataString))") // String ausgeben
+}
 </syntaxhighlight>

@@ Zeile 32: / Zeile 32: @@
 === Data Objekte in Strings umwandeln ===
-<syntaxhighlight lang="Swift">
+<syntaxhighlight lang="swift">
 if let safeData = data { // Safety Belt für Optionals
    let dataString = String(data: safeData, encoding: .utf8) // String aus Datenobjekt
    print("received data: \(String(describing: dataString))") // String ausgeben
+}
-<syntaxhighlight>
+</syntaxhighlight>

@@ Zeile 3: / Zeile 3: @@
 == String - Snippets ==
-=== String(format:) ===
+=== Strings formatieren mit String(format:) ===
 The String(format:) initializer is used to create a new string by formatting a set of variables using a format string.
@@ Zeile 29: / Zeile 29: @@
 let value: Float = 3.14159265
 let formattedString = String(format: "%.2f", value)
 <syntaxhighlight>

@@ Zeile 9: / Zeile 9: @@
 For example, the following code creates a string that contains a placeholder for an integer value:
-<syntaxhighlight lang="Swift">
+<syntaxhighlight lang="swift">
 let value = 42
 let string = String(format: "The value is %d", value)

← Nächstältere Version		Version vom 4. Januar 2023, 08:33 Uhr
Zeile 25:		Zeile 25:

	In this example, the %@ placeholder is replaced with the value of the name variable, and the %d placeholder is replaced with the value of the age variable. The resulting string is then printed to the console.		In this example, the %@ placeholder is replaced with the value of the name variable, and the %d placeholder is replaced with the value of the age variable. The resulting string is then printed to the console.
		+
		+	<syntaxhighlight lang="Swift">
		+	let value: Float = 3.14159265
		+	let formattedString = String(format: "%.2f", value)
		+	<syntaxhighlight>

@@ Zeile 1: / Zeile 1: @@
 == Links ==
-  [[Swift Programmiersprache]]
+  [[Swift (Programmiersprache)]]
 == String - Snippets ==