Emoji Picker Ios Swift

Question

我最近看到一个应用程序，它包含了一个表情符号选择器，用于对某些事情做出反应。我想实现一个类似的概念到我的应用程序，任何人都知道我可以创建像这张照片。我正在考虑使用collectionview，并让每个单元格都是自己的表情符号。任何想法或更好的方法？

Answer 1

为了把表情符号，为的CollectionView，做这样的：

var emojiList: [[String]] = [] 
let sectionTitle: [String] = ["Emoticons", "Dingbats", "Transport and map symbols", "Enclosed Characters"] 
override func layoutSubviews() { 
    super.layoutSubviews() 
    fetchEmojis() 
} 
func fetchEmojis(){ 



    let emojiRanges = [ 
     0x1F601...0x1F64F, 
     0x2702...0x27B0, 
     0x1F680...0x1F6C0, 
     0x1F170...0x1F251 
    ] 


    for range in emojiRanges { 
     var array: [String] = [] 
     for i in range { 
      if let unicodeScalar = UnicodeScalar(i){ 
       array.append(String(describing: unicodeScalar)) 
      } 
     } 

     emojiList.append(array) 
    } 

} 


override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { 
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! DragCell 
    cell.imageView.image = emojiList[indexPath.section][indexPath.item].image() 
    return cell 
} 
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 
    return emojiList[section].count 
} 

func numberOfSections(in collectionView: UICollectionView) -> Int { 
    return emojiList.count 
} 

有了这个扩展：

extension String { 

func image() -> UIImage? { 
    let size = CGSize(width: 100, height: 100) 
    UIGraphicsBeginImageContextWithOptions(size, false, 0); 
    UIColor.clear.set() 

    let stringBounds = (self as NSString).size(withAttributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 75)]) 
    let originX = (size.width - stringBounds.width)/2 
    let originY = (size.height - stringBounds.height)/2 
    print(stringBounds) 
    let rect = CGRect(origin: CGPoint(x: originX, y: originY), size: size) 
    UIRectFill(rect) 

    (self as NSString).draw(in: rect, withAttributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 75)]) 

    let image = UIGraphicsGetImageFromCurrentImageContext() 
    UIGraphicsEndImageContext() 
    return image 
} 

} 请记住，Unicode的表情符范围可能不包括所有的表情符号，你可能想要查找和修改你的应用程序的范围