UITableView and UIRefreshControl

Question

I'm trying to move the UIRefreshControl on top of my headerView or at least getting it to work with the contentInset. Anyone know how to use it?

I used a headerView to have a nice background when scrolling within the TableView. I wanted to have a scrollable background.

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Set up the edit and add buttons.

self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
self.tableView.backgroundColor = [UIColor clearColor];

[self setWantsFullScreenLayout:YES];

self.tableView.contentInset = UIEdgeInsetsMake(-420, 0, -420, 0);

UIImageView *top = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"top.jpg"]];
self.tableView.tableHeaderView = top;

UIImageView *bottom = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bottom.jpg"]];
self.tableView.tableFooterView = bottom;

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"settingsIcon"] style:UIBarButtonItemStylePlain target:self action:@selector(showSettings)];
self.navigationItem.leftBarButtonItem = leftButton;

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addList)];
self.navigationItem.rightBarButtonItem = addButton;

//Refresh Controls
self.refreshControl = [[UIRefreshControl alloc] init];

[self.refreshControl addTarget:self action:@selector(refreshInvoked:forState:) forControlEvents:UIControlEventValueChanged];
}

score 32 · Accepted Answer · edited May 23 '17 at 12:00

32

I'm not really sure what your intention is with the contentInset stuff, but in terms of adding a UIRefreshControl to a UITableView, it can be done. UIRefreshControl is actually intended for use with UITableViewController, but if you just add it as a subview to a UITableView it magically works. Please note this is undocumented behaviour, and may not be supported in another iOS release, but it is legal since it uses no private APIs.

- (void)viewDidLoad
{
    ...
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    [refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
    [self.myTableView addSubview:refreshControl];
}

- (void)handleRefresh:(id)sender
{
    // do your refresh here...
}

Credit to @Keller for noticing this.

edited May 23 '17 at 12:00

Community

1
1

answered Oct 16 '12 at 15:56

Echelon

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Inside a normal UIViewController you dont have self.refreshControl, so you are completely wrong lensovet – Godfather Apr 04 '13 at 14:32
1

This method has some issues if your tableview has a title view (on iOS7 at least). When you scroll down while refreshing, the table sections get all out of place, offset by the height of the title view. – AlBeebe Apr 15 '14 at 04:30

score 10 · Answer 2 · edited Mar 04 '15 at 01:06

@Echelon's answer is spot on, but I have one minor suggestion. Add the refresh control as a @property so you can access it later.

in YourViewController.h

@property (nonatomic, strong) UIRefreshControl *refreshControl;

in YourViewController.m

-(void) viewDidLoad {
    self.refreshControl = [[UIRefreshControl alloc] init];
    [self.refreshControl addTarget:self action:@selector(refresh) forControlEvents:UIControlEventValueChanged];
    [self.tableView addSubview:self.refreshControl]; //assumes tableView is @property
}

And the big reason to do it this way...

-(void)refresh {
    [self doSomeTask]; //calls [taskDone] when finished
}

-(void)taskDone {
    [self.refreshControl endRefreshing];
}

Just gives you class-wide access to the UIRefreshControl so you can endRefreshing or check the isRefreshing property of UIRefreshControl.

`@property (nonatomic,strong) UIRefreshView *refreshControl;` you probably mean `UIRefreshControl` here. Right? — Emil Ahlbäck, Jan 30 '15 at 09:16
@self.name Why would it call `taskDone` after finishing? It surprises me. in fact, it should execute `taskDone` and come back again to refresh, am I right? +1 for your answer though. — Ron, Nov 02 '16 at 18:17

UITableView and UIRefreshControl

2 Answers2