微信小步调 实现拼图功能
效果示例微信小步调 碎片拼图
功能描述
在微信小步调中，实现一个简单的拼图小游戏。用户需要将四张碎片图片拖动到目标图片的精确位置，详细功能如下：
拖动功能：
用户可以通过手指拖动碎片图片，自由移动到目标图片的任意位置。
位置匹配：
如果碎片被拖动到精确的位置（即与目标图片的预定区域完全重叠或匹配），碎片会主动吸附到目标图片的指定位置，并表现为已完成。
如果碎片被拖动到错误的位置（未能与目标区域匹配），碎片会主动返回到初始位置。
完成检测：
当全部碎片都被精确放置后，触发完成拼图的效果（如表现完整图片、播放动画或提示乐成信息）。
代码示例
[*]html
<!--pages/cssCase/puzzle1/index.wxml-->
<view class="container">
<!-- 上方的拼图框 -->
<view class="puzzle-box">
<view class="puzzle-cell" wx:for="{{puzzleCells}}" wx:key="id" id="{{item.id}}" data-id="{{item.id}}">
<image src="{{item.image}}" class="target-image"></image>
</view>
</view>
<!-- 下方的碎片 --> <!-- 添加 data-index 以传递碎片的索引 -->
<view class="pieces">
<view class="piece" wx:for="{{pieces}}" wx:key="id"
id="{{item.id}}"
style="left: {{item.left}}px; top: {{item.top}}px;"
data-id="{{item.id}}"
data-index="{{index}}"
bindtouchstart="onTouchStart"
bindtouchmove="onTouchMove"
bindtouchend="onTouchEnd"
wx:if="{{!item.hidden}}"> <!-- 只有当 hidden 为 false 时才显示碎片 -->
<image src="{{item.image}}"></image>
</view>
</view>
</view>
[*]css
/* pages/cssCase/puzzle1/index.wxss */
.container {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100%;
}
.puzzle-box {
margin: 20rpx;
border: 1px solid #ccc;
display: flex;
align-items: center;
justify-content: center;
flex-wrap: wrap;
padding: 20rpx;
box-sizing: border-box;
}
.puzzle-cell {
width: 300rpx;
height: 300rpx;
border: 1rpx solid #ccc;
position: relative;
}
.target-image {
width: 300rpx;
height: 300rpx;
}
.pieces {
display: flex;
justify-content: space-between;
width: 100%;
padding: 0 10rpx;
}
.piece {
width: 150rpx;
height: 150rpx;
position: absolute;
}
.piece image {
width: 100%;
height: 100%;
}
[*]js
// pages/cssCase/puzzle1/index.js
Page({
data: {
puzzleCells: [
{ id: 'cell-1', image: '', correctPieceId: 'piece-1' },
{ id: 'cell-2', image: '', correctPieceId: 'piece-2' },
{ id: 'cell-3', image: '', correctPieceId: 'piece-3' },
{ id: 'cell-4', image: '', correctPieceId: 'piece-4' },
],
pieces: [
{ id: 'piece-1', image: 'https://static.sprucesmart.com/activity/shandong/jigsawPuzzle20250109/ce1.jpeg', left: 10, top: 380, originalLeft: 10, originalTop: 380, hidden: false },
{ id: 'piece-2', image: 'https://static.sprucesmart.com/activity/shandong/jigsawPuzzle20250109/ce2.jpeg', left: 120, top: 380, originalLeft: 120, originalTop: 380, hidden: false },
{ id: 'piece-3', image: 'https://static.sprucesmart.com/activity/shandong/jigsawPuzzle20250109/ce3.jpeg', left: 210, top: 380, originalLeft: 210, originalTop: 380, hidden: false },
{ id: 'piece-4', image: 'https://static.sprucesmart.com/activity/shandong/jigsawPuzzle20250109/ce4.jpeg', left: 300, top: 380, originalLeft: 300, originalTop: 380, hidden: false },
],
draggingPiece: null,
draggingPieceIndex: null, // 用于记录当前拖拽的碎片在 pieces 中的索引
},
onTouchStart(e) {
const { id, index } = e.currentTarget.dataset;
this.setData({
draggingPiece: id,
draggingPieceIndex: index,
});
},
onTouchMove(e) {
const { pageX, pageY } = e.touches;
const updatedPieces = this.data.pieces.map((piece, index) => {
if (index === this.data.draggingPieceIndex) {
return { ...piece, left: pageX - 75, top: pageY - 75 }; // 让碎片跟随手指移动
}
return piece;
});
this.setData({ pieces: updatedPieces });
},
onTouchEnd(e) {
const { draggingPiece, draggingPieceIndex } = this.data;
if (!draggingPiece) return;
const query = wx.createSelectorQuery();
this.data.puzzleCells.forEach((cell) => {
query.select(`#${cell.id}`).boundingClientRect();
});
query.select(`#${draggingPiece}`).boundingClientRect();
query.exec((res) => {
const cellRects = res.slice(0, this.data.puzzleCells.length);
const pieceRect = res;
let placed = false;
cellRects.forEach((cellRect, index) => {
const cell = this.data.puzzleCells;
if (cell.correctPieceId === draggingPiece && this.checkOverlap(cellRect, pieceRect)) {
placed = true;
this.updatePuzzleCellImage(index, this.data.pieces.image);
this.hidePiece(draggingPieceIndex);
this.updatePiecePosition(draggingPieceIndex, cellRect.left, cellRect.top);
}
});
if (!placed) {
this.resetPiecePosition(draggingPieceIndex);
}
this.setData({ draggingPiece: null });
// 检查是否完成拼图
this.checkCompletion();
});
},
checkOverlap(box1, box2) {
return (
box1.left < box2.left + box2.width &&
box1.left + box1.width > box2.left &&
box1.top < box2.top + box2.height &&
box1.top + box1.height > box2.top
);
},
updatePuzzleCellImage(cellIndex, image) {
const updatedCells = [...this.data.puzzleCells];
updatedCells.image = image;
this.setData({ puzzleCells: updatedCells });
},
hidePiece(pieceIndex) {
const updatedPieces = this.data.pieces.map((piece, index) => {
if (index === pieceIndex) {
return { ...piece, hidden: true }; // 设置碎片为隐藏
}
return piece;
});
this.setData({ pieces: updatedPieces });
},
updatePiecePosition(pieceIndex, left, top) {
const updatedPieces = this.data.pieces.map((piece, index) => {
if (index === pieceIndex) {
return { ...piece, left, top };
}
return piece;
});
this.setData({ pieces: updatedPieces });
},
resetPiecePosition(pieceIndex) {
const updatedPieces = this.data.pieces.map((piece, index) => {
if (index === pieceIndex) {
return { ...piece, left: piece.originalLeft, top: piece.originalTop };
}
return piece;
});
this.setData({ pieces: updatedPieces });
},
// 检查拼图是否完成
checkCompletion() {
const allPiecesPlaced = this.data.pieces.every((piece) => piece.hidden);
if (allPiecesPlaced) {
wx.showToast({
title: '拼图完成！',
icon: 'success',
duration: 2000,
});
}
},
});
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