I am learning SwiftUI.
Error:
SwiftUI/Environment+Objects.swift:32: Fatal error: No Observable object of type ViewModel found. A View.environmentObject(_:) for ViewModel may be missing as an ancestor of this view.
I do not get the point why this happens.
The error is shown in the line : "renderer.render {...
import SwiftData
import SwiftUI
@Observable
class ViewModel {
var groupNumber: String = "Gruppe"
var sumOfHours: Int = 0
var personsToPrint: [Person]? = nil
@MainActor func pdfReport(person: [Person]) {
if personsToPrint != nil {
for person in personsToPrint! {
let renderer = ImageRenderer(content: PersonDetailView(person: person))
let url = URL.documentsDirectory.appending(path: "\(person.lastname) \(person.firstname).pdf")
print(person.lastname, person.firstname)
renderer.render { size, context in
var box = CGRect(x: 0, y: 0, width: size.width, height: size.height)
guard let pdf = CGContext(url as CFURL, mediaBox: &box, nil) else {
return
}
pdf.beginPDFPage(nil)
context(pdf)
pdf.endPDFPage()
pdf.closePDF()
let data = try! Data(contentsOf: url) //pdf muss erst in Daten umgewandelt werden.
do {
try data.write(to: url)
print("Daten wurden hier gespeichert: \(url)")
} catch {
print("PDF could not be saved!")
}
}
}
}
}
}
NewDeveloperBS
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I would like to write an App, to store sensitive data.
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Hello,
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There are several posts already. But none helps me in my task. Sometimes error message appears:
"The file "Text.strings" couldn't be opened using text encoding Unicode (UTF-8)." Sometimes the text is shown in strange format.
Why?
import Foundation
func printLine() -> String {
let filename = "Text"
var text: String
var myCounter: Int
guard let file = Bundle.main.url(forResource: filename, withExtension: "strings")
else {
fatalError("Couldn't find \(filename) in main bundle.")
}
do {
let contents = try String(contentsOf: file, encoding: String.Encoding.utf8 )
let lines = contents.split(separator:"\n")
print(contents)
print(lines)
myCounter = lines.count
print(myCounter)
text = String(myCounter)
} catch {
return (error.localizedDescription)
}
return text
}
This is the content of the text file:
"Text 1";
"Text 2";
"Text 3";
I learn how to code.
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Those lines show no effect in the simulator:
singleStackView.isHidden = true
multipleStackView.isHidden = true
rangedStackView.isHidden = true
Why?