Kyle-Ye

Disabling CALayerSystem Behavior in SwiftUI on iOS 26

Starting with iOS 26, SwiftUI's UIHostingView may use CALayer-based rendering (caLayerSystem) instead of the traditional UIKit-based rendering (uikitSystem) when certain conditions are met. This can cause unexpected changes in the view hierarchy — for example, _UIGraphicsView and CGDrawingView subviews may be replaced by plain CALayer and CGDrawingLayer sublayers.

Here are two approaches to temporarily disable this behavior in your local debug environment.

Option 1: Environment Variable

Set the environment variable SWIFTUI_DISABLE_MIXED_VIEW_HIERARCHY=1 in your scheme's Run configuration (Edit Scheme → Run → Arguments → Environment Variables).

timi2506

//
//  CoverFlip.swift
//  CoverFlip
//
//  Created by Tim on 26.02.26.
//

import SwiftUI

struct CoverFlipTransition: AnimatableModifier {

radiofun

[[ stitchable ]] half4 distortionWithScale(float2 pos, SwiftUI::Layer l, float4 boundingRect, float2 dragp, float progress) {
    float2 delta = pos - dragp;
    float dist = length(delta);
    
    // Define the influence of the "force" from the drag point
    float radius = 155.0; // Radius of effect
    float strength = 0.8; // How much it pulls
    
    // Influence peaks at 0.5, is 0 at 0.3 and 1.0 - you can customize these values. 
    float progressinfluence = smoothstep(0.3, 0.5, progress) * (1.0 - smoothstep(0.5, 1.0, progress));

Mcrich23

public func _UIViewGlass(variant: Int) -> NSObject? {
    let glassClass = objc_lookUpClass("_UIViewGlass")! as AnyObject
    let glass = glassClass._alloc()._init(variant: variant)
    return glass as? NSObject
}

/// Registers Objective-C methods Swift needs.
fileprivate final class PrivateSelectors: NSObject {

    @objc(alloc)

sebjvidal

//
//  ViewController.swift
//  UIGlassContainerEffect-Demo
//
//  Created by Seb Vidal on 04/11/2025.
//

import UIKit
import MapKit

Kyle-Ye

// Usage: ViewGraph.current.append(feature: HStackImplicitFeature())
struct HStackImplicitFeature: ViewGraphFeature {
    func modifyViewInputs(inputs: inout _ViewInputs, graph: ViewGraph) {
        inputs.implicitRootType = _HStackLayout.self
    }
}

struct ContentView: View {
    var body: some View {
        ChildView1()

Kyle-Ye

// kdebug_interpose.c

#include <stdbool.h>
#include <stdint.h>
#include <dlfcn.h>

// Forward declare the original
extern bool kdebug_is_enabled(uint32_t debugid);

// Our replacement

Yuki2718

---
action:
  type: block
condition:
  urlFilter: ||nicoad.nicovideo.jp^
---

juliensagot

private struct AsymmetricInsettableShape<S: Shape>: InsettableShape {
  private let shape: S
  private var horizontal: CGFloat
  private var vertical: CGFloat
  
  private var insetAccumulator: CGFloat = 0
  
  init(
    shape: S,
    horizontal: CGFloat,

sebjvidal

//
//  ContentView.swift
//  MapModeButton-Demo
//
//  Created by Seb Vidal on 30/07/2025.
//

import SwiftUI

struct ContentView: View {