【HarmonyOS Next】ArkUI-X POPGAME

#harmonyos

Multi-End Development Practice: H5-Native Integration

Technical Highlight: Seamlessly embed H5 games into native apps via ArkUI-X’s Web component, enabling "code once, run everywhere" across HarmonyOS and iOS platforms.

I. Technical Architecture Design

This tile-matching game adopts a hybrid development architecture:

graph LR
A[ArkUI-X Container] --> B[Web Component]
B --> C[HTML5 Game Core]
C --> D[Canvas Rendering]
C --> E[Touch Event Handling]
C --> F[Responsive Layout]

ArkTS serves as the container layer for cross-platform capabilities, while Vue+Canvas implements core game logic, bridged via the Web component.

II. ArkTS Core Implementation

@Entry
@Component
struct Index {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Web({
        src: $rawfile('game.html'), // Load local H5 resources
        controller: this.controller
      })
      .width('100%')
      .height('100%')
      .javaScriptAccess(true) // Enable JS interaction
    }
  }
}

Key Capabilities:

Local Resource Loading: $rawfile() directly embeds packaged H5 resources.
JS Interoperability: javaScriptAccess enables bidirectional communication.
Full-Screen Adaptation: Percentage sizing ensures multi-device compatibility.

III. Key H5 Game Technologies

1. Cross-End Canvas Adaptation

// DPR-aware rendering
const dpr = window.devicePixelRatio || 1;
canvas.style.width = size + 'px'; 
canvas.width = size * dpr; // Physical pixel adaptation
ctx.scale(dpr, dpr);

// Dynamic unit sizing
cellSize = container.offsetWidth / GRID_SIZE;

Solved Pain Point: Eliminates blurring on high-DPI devices.

2. High-Performance Animation Engine

// Swap animation (RAF-based)
function swapAnimation(a, b) {
  return new Promise(resolve => {
    const animate = (timestamp) => {
      // Calculate displacement with easing functions
      cellA.offsetX = dx * cellSize * ratio; 
      requestAnimationFrame(animate);
    }
  })
}

// Explosion effect
cell.scale = 1 + ratio * 0.5; // Scaling animation
cell.alpha = 1 - ratio;       // Fade-out effect

Optimization Strategies:

requestAnimationFrame ensures 60FPS smoothness
Decoupled rendering/logic threads
DOM object pooling

3. Multi-End Touch Event Normalization

canvas.addEventListener('click', e => {
  const rect = canvas.getBoundingClientRect();
  // Coordinate conversion (CSS scaling compatible)
  const x = Math.floor((e.clientX - rect.left) / cellSize); 
  const y = Math.floor((e.clientY - rect.top) / cellSize);
});

Innovation: touch-action: none disables default browser behavior for native-like responsiveness.

IV. Cross-Platform Adaptation

1. Layout Adaptation

#gameContainer {
  width: 90vmin; /* Viewport units for aspect ratio */
  max-width: 400px; /* Large-screen boundary control */
}
.controls {
  top: -70px; /* Absolute positioning avoids game area */
}

2. Device-Specific Strategies

Device	Challenge	Solution
Huawei Nova 12 Ultra	Curved-edge touch response	Increased game area margins
iPhone 13 Pro	Dynamic Island occlusion	SafeArea detection
Foldables	Aspect ratio mutation	Dynamic vmin unit adaptation

V. Performance Optimization Results

Rendering Efficiency: Canvas batch rendering maintains ≥55 FPS
Memory Control: Object reuse caps memory at ≤35MB
Launch Speed: Local resource loading <0.3s

VI. Development Best Practices

Communication: Use WebView.postMessage() for complex data
Hot Updates: Configure fallback src: 'https://xxx' for cloud loading
Security: Enforce Content Security Policy (CSP)

Project Summary: Leveraging ArkUI-X's Web component bridging, we combined H5's core advantages (rapid iteration, dynamic updates) with native app performance. Validated on HarmonyOS/iOS:

Touch response latency <80ms

Animation smoothness matching native apps

92% code reuse rate

This hybrid architecture pioneers a new paradigm for casual games, extendable to leaderboards/social sharing.

Future Directions: