我们如何在Firebase中进行分页？

Question

在列出或从Google Firebase获取数据列表时,我们如何分页收集的数据？举个例子,

countries = [ 
  {name: 'Afghanistan', code: 'AF'}, 
  {name: 'Åland Islands', code: 'AX'}, 
  {name: 'Albania', code: 'AL'}, 
... 
] 

我想列出每页10个,如果我想得到page =0 with size 10或page=5 with size=5

Answer 1

举个例子

{
  -KBZIPRqYmrRgNZ3GJt6: { asc: 1, desc: 9, name: "Rusty Kovacek"},
  -KBZIPRvieZbW-k9R9ra: { asc: 2, desc: 8, name: "Lloyd Feil" },
  -KBZIPRvieZbW-k9R9rc: { asc: 3, desc: 7, name: "Jasmin Hilll" },
  -KBZIPRwiXUgOtv3fCAL: { asc: 4,  desc: 6, name: "Ms. Ibrahim Schinner" },
  -KBZIPRwiXUgOtv3fCAN: { asc: 5, desc: 5,  name: "Dorothea Koepp" },
  -KBZIPRxpCAUyo5TJmY3: { asc: 6, desc: 4, name: "Melvin Marquardt" }, 
  -KBZIPRxpCAUyo5TJmY5: { asc: 7,  desc: 3, name: "Celestine Bode"  },
  -KBZIPRy5Uvz9wUOa6Jx: { asc: 8,  desc: 2, name: "Emerald Olson"  }, 
  -KBZIPRy5Uvz9wUOa6Jz: { asc: 9, desc: 1, name: "Miss Joey Jacobi" }, 
  -KBZIPRzRhuguDLLftQR: { asc: 10, desc: 0, name: "Ms. Denis Rutherford" }
}

和

{
  -KBZIPRqYmrRgNZ3GJt6: { asc: 1, desc: 9, name: "Rusty Kovacek"},
  -KBZIPRvieZbW-k9R9ra: { asc: 2, desc: 8, name: "Lloyd Feil" },
  -KBZIPRvieZbW-k9R9rc: { asc: 3, desc: 7, name: "Jasmin Hilll" },
  -KBZIPRwiXUgOtv3fCAL: { asc: 4,  desc: 6, name: "Ms. Ibrahim Schinner" },
  -KBZIPRwiXUgOtv3fCAN: { asc: 5, desc: 5,  name: "Dorothea Koepp" },
  -KBZIPRxpCAUyo5TJmY3: { asc: 6, desc: 4, name: "Melvin Marquardt" }, 
  -KBZIPRxpCAUyo5TJmY5: { asc: 7,  desc: 3, name: "Celestine Bode"  },
  -KBZIPRy5Uvz9wUOa6Jx: { asc: 8,  desc: 2, name: "Emerald Olson"  }, 
  -KBZIPRy5Uvz9wUOa6Jz: { asc: 9, desc: 1, name: "Miss Joey Jacobi" }, 
  -KBZIPRzRhuguDLLftQR: { asc: 10, desc: 0, name: "Ms. Denis Rutherford" }
}