How to story multiple values for one object in NSMutableDictionary? - ios

Question

I would like to story many items in one object (the name of the user, their photo, and the time the photo was taken). I have tried to use three different arrays to do this and it somewhat works, however since I am loading this into a tableview its not the best way to do this. I am thinking about using a NSMutableDictionary but I can't seem to do it. Any help would be appreciated!

Answer 1

You can do like this.
NSDictionary *dic = [[NSDictionary alloc]initWithObjectsAndKeys:
#"Jone",#"UserName",
#"Jone.png",#"Photo",
[NSDate date],#"Time",nil];
NSMutableArray *userArray = [[NSMutableArray alloc] init];
[userArray addObject:dic];
//NSLog(#"%#",userArray);
for (int i=0; i<userArray.count; i++) {
NSDictionary *userDictionary = [userArray objectAtIndex:i];
NSLog(#"UserName:%#",[userDictionary valueForKey:#"UserName"]);
NSLog(#"Photo:%#",[userDictionary valueForKey:#"Photo"]);
NSLog(#"Time:%#",[userDictionary valueForKey:#"Time"]);
}
Note:I think you need to use "NSMutableArray" of NSDictionary. if you all user property (username,photo,time...) are unpredictable the only you need to use NSMutableDictionary.

Answer 2

What you want to do is create a User Entity (Swift/Objective-C Class) with username, photo and photoTime fields.
Create the users, put drop them in an array and then read from it while you are creating the table in cellForRowAtIndexPath.
#interface User : NSObject
#property (nonatomic, retain) NSString *userName;
#property (nonatomic, retain) NSString *photoURL;
#property (nonatomic, retain) NSString *photoTime;
#end
Then somewhere within your code where you create users...
NSMutableArray *usersArray= [[NSMutableArray alloc] init];
User *user= [[Useralloc] init];
user.userName=#"someUserName"
user.photoURL=#"http://somephotourl.com";
user.photoTime=#"1231232132121";
[usersArray addObject:user];

Answer 3

The data structure behind a UITableView is usually NSArray or a list of some kind. Each object in the array should represent a row in the table.
Following this pattern your structure should look like that:
var users = [User]()
struct User {
let name: String
let photo: UIImage
let date: NSDate
}
// This struct could also be a dictionary
var user = [String: AnyObject]()
user["name"] = ..
user["photo"] = ..
user["date"] = ...
Instantiate User objects and add them to the users array when appropriate.
Your UITableView should find the correct user and update the cell accordingly in the dataSource method:
func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = .. // Dequeue cell
let user = users[indexPath.row] // Get the user for this row
cell.textLabel.title = user.name // Update cell properties
// etc..
// OR using a dictionary
cell.textLabel.title = user["name"]
// etc..
return cell