地點相片

查看完整範例原始碼

這個簡單的相片輪轉介面會顯示指定地點的相片，包括必要的作者出處資訊 (顯示於相片左上角)。

TypeScript

async function init() {
    const { Place } = await google.maps.importLibrary('places') as google.maps.PlacesLibrary;

    // Use a place ID to create a new Place instance.
    const place = new Place({
        id: 'ChIJydSuSkkUkFQRsqhB-cEtYnw', // Woodland Park Zoo, Seattle WA
    });

    // Call fetchFields, passing the desired data fields.
    await place.fetchFields({ fields: ['displayName', 'photos', 'editorialSummary'] });

    // Get the various HTML elements.
    let heading = document.getElementById('heading') as HTMLElement;
    let summary = document.getElementById('summary') as HTMLElement;
    let gallery = document.getElementById('gallery') as HTMLElement;
    let expandedImageDiv = document.getElementById('expanded-image') as HTMLElement;
    let attributionLabel;

    // Show the display name and summary for the place.
    heading.textContent = place.displayName as string;
    summary.textContent = place.editorialSummary as string;

    // Add photos to the gallery.
    if (place.photos) {
        place.photos?.forEach((photo) => {
            const img = document.createElement('img');
            const expandedImage = document.createElement('img');
            img.src = photo.getURI({maxHeight: 380});
            img.addEventListener('click', (event) => {
                event.preventDefault();
                expandedImage.src = img.src;
                expandedImageDiv.innerHTML = '';
                expandedImageDiv.appendChild(expandedImage);
                attributionLabel = createAttribution(photo.authorAttributions);
                expandedImageDiv.appendChild(attributionLabel);
            });

            gallery.appendChild(img);
        });
    }

    // Display the first photo.
    const img = document.createElement('img');
    img.src = place.photos![0].getURI();
    expandedImageDiv.appendChild(img);
    attributionLabel = createAttribution(place.photos![0].authorAttributions);
    expandedImageDiv.appendChild(attributionLabel);

    // Helper function to create attribution DIV.
    function createAttribution(attribution) {
        attributionLabel = document.createElement("a");
        attributionLabel.classList.add('attribution-label');
        attributionLabel.textContent = attribution[0].displayName;
        attributionLabel.href = attribution[0].uri;
        attributionLabel.target = '_blank;'
        return attributionLabel;
    }
}

init();
index.ts

JavaScript

async function init() {
  const { Place } = await google.maps.importLibrary("places");
  // Use a place ID to create a new Place instance.
  const place = new Place({
    id: "ChIJydSuSkkUkFQRsqhB-cEtYnw", // Woodland Park Zoo, Seattle WA
  });

  // Call fetchFields, passing the desired data fields.
  await place.fetchFields({
    fields: ["displayName", "photos", "editorialSummary"],
  });

  // Get the various HTML elements.
  let heading = document.getElementById("heading");
  let summary = document.getElementById("summary");
  let gallery = document.getElementById("gallery");
  let expandedImageDiv = document.getElementById("expanded-image");
  let attributionLabel;

  // Show the display name and summary for the place.
  heading.textContent = place.displayName;
  summary.textContent = place.editorialSummary;
  // Add photos to the gallery.
  if (place.photos) {
    place.photos?.forEach((photo) => {
      const img = document.createElement("img");
      const expandedImage = document.createElement("img");

      img.src = photo.getURI({ maxHeight: 380 });
      img.addEventListener("click", (event) => {
        event.preventDefault();
        expandedImage.src = img.src;
        expandedImageDiv.innerHTML = "";
        expandedImageDiv.appendChild(expandedImage);
        attributionLabel = createAttribution(photo.authorAttributions);
        expandedImageDiv.appendChild(attributionLabel);
      });
      gallery.appendChild(img);
    });
  }

  // Display the first photo.
  const img = document.createElement("img");

  img.src = place.photos[0].getURI();
  expandedImageDiv.appendChild(img);
  attributionLabel = createAttribution(place.photos[0].authorAttributions);
  expandedImageDiv.appendChild(attributionLabel);

  // Helper function to create attribution DIV.
  function createAttribution(attribution) {
    attributionLabel = document.createElement("a");
    attributionLabel.classList.add("attribution-label");
    attributionLabel.textContent = attribution[0].displayName;
    attributionLabel.href = attribution[0].uri;
    attributionLabel.target = "_blank;";
    return attributionLabel;
  }
}

init();
index.js

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
#map {
  height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#container {
  display: flex;
  padding: 10px;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}

.place-overview {
  width: 400px;
  height: 380px;
  overflow-x: auto;
  position: relative;
  margin-right: 20px;
}

#info {
  font-family: sans-serif;
  position: sticky;
  position: -webkit-sticky;
  left: 0;
  padding-bottom: 10px;
}

#heading {
  width: 500px;
  font-size: x-large;
  margin-bottom: 20px;
}

#summary {
  width: 500px;
}

#gallery {
  display: flex;
}

#gallery img {
  width: 200px;
  height: 200px;
  margin-right: 10px;
  margin-top: 40px;
  border-radius: 10px;
  cursor: pointer;
}

#expanded-image {
  display: flex;
  height: 380px;
  overflow: hidden;
  background-color: #000;
}

#expanded-image img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.attribution-label {
  background-color: #fff;
  opacity: 0.7;
  font-size: 10px;
  font-family: sans-serif;
  margin: 2px;
  position: absolute;
}

style.css

HTML

<html>
  <head>
    <title>Place Photos</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="container">
      <div class="place-overview">
        <div id="info">
          <div id="heading"></div>
          <div id="summary"></div>
        </div>
        <div id="gallery"></div>
      </div>
      <div id="expanded-image"></div>
    </div>

    <!-- prettier-ignore -->
    <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
  </body>
</html>
index.html

測試範例

地點相片可讓您在網頁中加入高品質的相片內容。存取儲存在 Places 資料庫中的數百萬張相片，並使用 Find Place、Nearby Search、Text Search、Autocomplete 和 Place Details 取得可調整大小的圖片。

取得相片

如要取得地點的相片，請在 fetchFields() 要求參數中加入 photos 欄位。產生的 Place 例項包含最多 10 個 Photo 物件的陣列，您可以透過該陣列存取圖片及其必要的歸屬資訊。呼叫 getURI() 即可傳回來源相片 URI，並指定圖片的最大高度和/或寬度。如果同時指定 maxHeight 和 maxWidth 的值，「地點相片」服務會將圖片調整為兩種尺寸中的較小尺寸，並保留原始的顯示比例。

以下範例說明如何針對相片提出 Place Details 要求、在相片例項上呼叫 getURI() 以傳回圖片的來源 URI，然後將第一個相片結果新增至 img 元素 (為了清楚起見，已略去出處資訊)：

const { Place } = await google.maps.importLibrary('places');

// Use a place ID to create a new Place instance.
const place = new Place({
    id: 'ChIJydSuSkkUkFQRsqhB-cEtYnw', // Woodland Park Zoo, Seattle WA
});

// Call fetchFields, passing the desired data fields.
await place.fetchFields({ fields: ['photos'] });

// Add the first photo to an img element.
const photoImg = document.getElementById('image-container');
photoImg.src = place.photos[0].getURI({maxHeight: 400});

作者出處資訊

顯示相片時，您也必須一併顯示相片作者的出處資訊。使用 AuthorAttribution 類別傳回歸因資訊。歸屬資訊包括作者名稱 (displayName)、Google 地圖個人資料的 URI (uri)，以及作者相片的 URI (photoURI)。以下程式碼片段示範如何針對地點相片傳回 displayName、uri 和 photoURI。

  let name = place.photos[0].authorAttributions[0].displayName;
  let url = place.photos[0].authorAttributions[0].uri;
  let authorPhoto = place.photos[0].authorAttributions[0].photoURI;