GeoFire查詢沒有返回結果

Question

我有商店的列表如下：

"store" : { 
"2" : { 
"address" : "amman", 
"ctime" : "17:05:00", 
"g" : "9q8yyxfgs8", 
"id" : "11", 
"l" : [ 31.9453666, 35.9283716 ], 
"name" : "Kaluti", 
"otime" : "00:00:00", 
"phone" : "0795080034", 
"userId" : "4" 
}, 
"7" : { 
"address" : "amman", 
"ctime" : "01:00:00", 
"g" : "9q8yyxfgs8", 
"id" : "7", 
"l" : [ 31.9453666, 35.9283716 ], 
"name" : "Zalloum33", 
"otime" : "05:00:00", 
"phone" : "0795080034", 
"userId" : "2" 
}, 
"11" : { 
"address" : "amman", 
"ctime" : "17:05:00", 
"g" : "9q8yyxfgs8", 
"id" : "11", 
"l" : [ 31.9453666, 35.9283716 ], 
"name" : "Kaluti", 
"otime" : "00:00:00", 
"phone" : "0795080034", 
"userId" : "4" 
}, 
"12" : { 
"address" : "asd", 
"ctime" : "22:00:00", 
"g" : "9q8yyxfgs8", 
"id" : "12", 
"l" : [ 37.7922, -122.4056973 ], 
"name" : "Amam", 
"otime" : "10:00:00", 
"phone" : "0795126776", 
"userId" : "4" 
}, 
"19" : { 
".priority" : "9q8yyxfgs8", 
"g" : "9q8yyxfgs8", 
"id" : "10", 
"l" : [ 37.7922, -122.4056973 ], 
"name" : "ahmad" 
} 
} 

，當我嘗試使用此代碼來獲取這個位置查詢沒有返回任何值

let center = CLLocation(latitude: 31.97375, longitude: 35.872316) 

if let circleQuery = geoFire?.query(at: center, withRadius: 1.0) { 
    _ = circleQuery.observe(.keyEntered) { (key, location) in 
     print("Key '\(key)' entered the search area and is at location '\(location)'") 
    } 

    circleQuery.observeReady{ 
     print("All initial data has been loaded and events have been fired for circle query!") 
    } 
} 

但如果我嘗試使用相同的代碼，只是改變CLLocation與

let center = CLLocation(latitude: 37.7832889, longitude: -122.4056973) 

它的返回數據。

請指教我問題在哪裏？

Answer 1

您需要根據需要調整半徑。在你的例子中，你的半徑爲1.0米，它只會將1米範圍內的物體返回到你的中心位置。試試吧增加到500.0米就像我在下面的例子做了：

let center = CLLocation(latitude: 31.97375, longitude: 35.872316) 

if let circleQuery = geoFire?.query(at: center, withRadius: 500.0) { 
    _ = circleQuery.observe(.keyEntered) { (key, location) in 
     print("Key '\(key)' entered the search area and is at location '\(location)'") 
    } 

    circleQuery.observeReady{ 
     print("All initial data has been loaded and events have been fired for circle query!") 
    } 
}