[英]How to retrieve data from firebase using Swift?
I have this code for getting data from firebase database : 我有这段代码用于从firebase数据库获取数据:
FIRDatabase.database().reference().child("Root").child("User1").child("chat1")
.observeSingleEvent(of: .value , with: { snapshot in
if snapshot.exists() {
let recent = snapshot.value as! NSDictionary
print(recent)
})
There is a problem with the result of snapshot, the print(recent)
sometimes prints all values of that child (10 values) which is the thing I want, but some time it prints only two values of that child I don't know why. 快照的结果有问题,
print(recent)
有时会打印该子项的所有值(10个值),这是我想要的,但是有时它只打印该子项的两个值,我不知道为什么。
How to fix this ? 如何解决呢?
This is my database structure : 这是我的数据库结构:
Since I can not comment and I just want to ask something, I will remove this answer later on, but is your data in sync? 由于我无法发表评论,而只是想问些问题,因此稍后我将删除此答案,但是您的数据是否同步? Did you call the method yourreference.keepSynced(true)?
您是否将该方法称为yourreference.keepSynced(true)?
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