UITableViewController doesn't refresh correctly - ios

Question

I'm building an app (UITabBar) where I'm storing a NSMutableArray of custom objects. My custom object is called DayModel.
My DayModel.h file:
#import <Foundation/Foundation.h>
#interface DayModel : NSObject
#property (nonatomic, retain) NSDate *mydate;
#property (nonatomic) float myFloat;
#end
My DayModel.m file:
#import "DayModel.h"
#implementation DayModel
#synthesize myDate, myFloat;
-(id)init {
// Init self
self = [super init];
if (self) {
// Setup
}
return self;
}
- (void)encodeWithCoder:(NSCoder *)coder;
{
[coder encodeObject:self.myDate forKey:#"myDate"];
[coder encodeObject:self.myFloat forKey:#"myFloat"];
}
- (id)initWithCoder:(NSCoder *)coder;
{
self = [[DayModel alloc] init];
if (self != nil)
{
self.myDate = [coder decodeObjectForKey:#"myDate"];
self.myFloat = [coder decodeFloatForKey:#"myFloat"];
}
return self;
}
#end
The "main" ViewController, saving the new objects:
// Add data to the DayModel class
DayModel *currentDay = [[DayModel alloc] init];
currentDay.myDate = myDate;
currentDay.myFloat = myFloat;
// Add currentDay to the _objects NSMutableArray
[_objects insertObject:currentDay atIndex:0];
// Save this array using NSKeyedArchiver
[[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:_objects] forKey:#"objects"];
my UITableViewController displaying this:
viewWillAppear
// Load the _objects array
NSData *objectsData = [defaults objectForKey:#"objects"];
if (objectsData != nil)
{
NSArray *oldArray = [NSKeyedUnarchiver unarchiveObjectWithData:objectsData];
if (oldArray != nil)
{
_objects = [[NSMutableArray alloc] initWithArray:oldArray];
} else
{
_objects = [[NSMutableArray alloc] init];
}
} else
{
_objects = [[NSMutableArray alloc] init];
}
Other methods:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
return [_objects count];
}
Loading the data:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
// Get the DayModel
DayModel *currentModel = [[DayModel alloc] init];
currentModel = _objects[indexPath.row];
// Get the UILabels
UILabel *dateLabel = (UILabel *)[cell viewWithTag:10];
UILabel *floatLabel = (UILabel *)[cell viewWithTag:20];
// Create the DateFormatter
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd-MM-yyyy"];
// Set the text
dateLabel.text = [dateFormatter stringFromDate:currentModel.myDate];
floatLabel.text = [NSString stringWithFormat:#"%.02f", currentModel.myFloat];
return cell;
}
Reproducing the problem:
Add item from tab nr 1
Go to tab nr 2 (table). Data is displayed correctly
Go to tab nr 1 and add new object
Go to tab nr 2 (table). New item is displayed with data from previews item, not new data.
When the app is reloaded, the table displays correctly.
EDIT
What happens is that the new item is added at index 0 to appear at the top of the list, while the tableview class get's the new information from the last row when it should be getting it from the top. How can I "reverse" this?
Thanks!
Erik

Answer 1

I fixed it by reloading the whole list, not only adding the new item. This code is going under the lines loading the list from NSUserDefaults (viewWillAppear).
// Reload the UITableView completely
[self.tableView reloadData];
Please tell me if there's a better solution:)