我试图从一个包含2500个条目的类中获取信息。当我只尝试了1000个条目时,这个代码是有效的。
但是,当我将它放入for循环中时,它会引发以下错误:“nsInternalConsistenceyException”,原因:“此查询有一个未完成的网络连接。你得等到事情结束。”
代码如下:
func loadDataFromParse(){
var classLimit = 2
println("Loading Parse data")
var query = PFQuery(className: "StopList")
query.limit = 1000
for (var j = 0; j < classLimit+1; j++)
{
query.skip = 1000*j
query.findObjectsInBackgroundWithBlock ({(objects:[AnyObject]!, error: NSError!) in
if(error == nil){
if let stopObjects = objects as? [PFObject] {
for stop in stopObjects {
// Code goes here
}
}}
else{
println("Error in retrieving \(error)")
}
})
}
}
有什么想法吗?
最佳答案
明白了!每次循环迭代时需要重新初始化查询变量:
func loadDataFromParse(){
var i = 1
var limit = 2
println("Loading Parse data")
for (var j = 0; j < limit+1; j++)
{
var query = PFQuery(className: "StopList")
query.limit = 1000
query.skip = 1000*j
query.findObjectsInBackgroundWithBlock ({(objects:[AnyObject]!, error: NSError!) in
if(error == nil){
if let stopObjects = objects as? [PFObject] {
for stop in stopObjects {
println(i)
i += 1
}
}}
else{
println("Error in retrieving \(error)")
}
})
}
}