How to Put a static UIButton Overlaying a UITableView - ios

Question

Basically, I wanna create a static UIButton on top whether or not the table view is scrolled. However, I tried to add the UIButton as the subview of the UIView and make it on the top by using "bringSubviewToFront" method. However, the UIButton still moves when I scroll the UITableView. Therefore, how can I make a static UIButton overlaying the UITableView?
Here is my code:
#import "DiscoverTimelineTableViewController.h"
#interface DiscoverTimelineTableViewController ()
#property (strong, nonatomic) UIView* myview;
#end
#implementation DiscoverTimelineTableViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self displayMakePlanButton];
NSLog(#"%f", self.view.layer.zPosition);
NSLog(#"%f", self.tableView.layer.zPosition);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 100.0f;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
// Configure the cell...
cell.textLabel.text = #"Sleepy";
return cell;
}
#pragma mark - Add the make plan button
- (void) displayMakePlanButton
{
CGFloat buttonWidth = self.view.frame.size.width;
CGFloat buttonHeight = 104.0f;
CGFloat navBarHeight = self.navigationController.navigationBar.frame.size.height;
CGFloat statBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
UIButton *makePlanButton = [UIButton buttonWithType: UIButtonTypeCustom];
[makePlanButton setFrame:CGRectMake(0, self.view.frame.size.height - buttonHeight - navBarHeight - statBarHeight, buttonWidth, buttonHeight)];
[makePlanButton setBackgroundColor:[UIColor colorWithRed:0.286 green:0.678 blue:0.231 alpha:1]];
[makePlanButton setTitle:#"MAKE PLAN" forState:UIControlStateNormal];
[self.view addSubview:makePlanButton];
//makePlanButton.layer.zPosition = 1;
[self.view bringSubviewToFront:makePlanButton];
NSLog(#"%f", makePlanButton.layer.zPosition);
}
#end

Answer 1

You're using a table view controller, so self.view is the table view. A table view is a scroll view, so the view scrolls along with everything else.
You should use a regular view controller with a table as a subview instead.
Alternatively, you could try resetting the view's frame in the scrollViewDidScroll: scroll view delegate method, but I think the view would still jitter a bit.
Finally, you could add the button directly to the UIWindow, but that's likely to bring up a whole host of other problems with rotations, animations, and transitions.