[英]Why am I getting an integer to pointer conversion error in objective-c?
[英]Why am I getting the pointer error?
在用户类中,我有一个指向用户类的指针“友谊”,但是当我运行程序时,出现错误-
编辑:我想通了为什么我得到错误。 “友谊不是指针,而是PFRelation,但是我仍然想访问ProPic和用户名。我该怎么做?
func getFriendPic(){
let imagequery = PFQuery(className: "_User")
imagequery.whereKey("username", equalTo: PFUser.currentUser()!)
imagequery.includeKey("Friendship")
imagequery.findObjectsInBackgroundWithBlock {( objects: [AnyObject]?, error: NSError?) -> Void in
for object in objects!{
let userPic = object["ProPic"] as! PFFile
userPic.getDataInBackgroundWithBlock({ (imageData: NSData?, error: NSError?) -> Void in
if(error == nil){
let image = UIImage(data: imageData!)
self.arrayOfFriends.append(image!)
print(self.arrayOfFriends)
}
// dispatch_async(dispatch_get_main_queue()) {
// self.collectionView.reloadData()
// }
})
}
}
}
func getFriendName(){
var query = PFQuery(className: "_User")
query.whereKey("username", equalTo: PFUser.currentUser()!)
query.includeKey("Friendship")
query.findObjectsInBackgroundWithBlock({
(objects: [AnyObject]?, error: NSError?) -> Void in
var objectIDs = objects as! [PFObject]
for i in 0...objectIDs.count-1{
self.arrayOfFriendsNames.append(objectIDs[i].valueForKey("username") as! String)
print(self.arrayOfFriendsNames)
}
})
}
include
查询参数不适用于Relation
。 检索用户后,您需要执行第二个查询才能获得友谊。
这是检索PFRelation的示例:
var relation = user.relationForKey("Friendship")
relation.query().findObjectsInBackgroundWithBlock {
(objects: [PFObject]?, error: NSError?) -> Void in
if let error = error {
// There was an error
} else {
// objects contains the friendships of the user
}
}
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