Array个人总结

• 删除数组中某个特定的元素
  selectedArray.removeAll(where: { $0 == model })

• 筛选数组
  let tempArray = list.filter{ return ($0.beesNickname?.contains(text) ?? false)}

• 取出数组中，字典的某个元素
  let price:[Int] = selectedArray.map{ $0.totalPrice}

• 数组元素相加
  settlementView.priceLabel.text = "合计：¥\(price.reduce(0, +))"

• 数组转字符串

let data = [1, 2, 3, 4, 5]
let dataStr = data.map(String.init)
let resultString = dataStr.joined(separator: ",")

• 字符串转数组