Objective-c floating button, same procedure different behaviour - objective-c

Question

I have a created a floating button on a UITableViewController. It works like expected.
Now I wanted to use the button as well on a UIViewController where I added a UITableView.
The code for creating the floating button is identically, but the behaviour is different.
At the UITableViewController the button stay where it shall.
At the UIViewController the button moves up (when I scroll down) and down (when I scroll up)
How do I get the button stay where it shall on the UIViewController. Like on the UITableViewController?
TableViewController.h
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#import "SingletonClass.h"
#interface MagTableViewController : UITableViewController <UIGestureRecognizerDelegate>
#property (strong, nonatomic) IBOutlet UITableView *magTableView;
#property (strong, nonatomic) UIButton *oButton;
#property (nonatomic) float originalOrigin;
#end
TableViewController.m - floating button, works like expected
- (void)viewDidLoad
{
[super viewDidLoad];
SingletonClass *sharedSingleton = [SingletonClass sharedInstance];
self.originalOrigin = sharedSingleton.photoButtonY; // 430.0
[self addOverlayButton];
}
#pragma mark Camera Button
- (void)addOverlayButton {
self.oButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.oButton.frame = CGRectMake(132.0, self.originalOrigin, 56.0, 56.0);
[self.oButton setImage:[UIImage imageNamed:#"CameraButton56x56.png"] forState:UIControlStateNormal];
[self.oButton addTarget:self action:#selector(toCameraView:) forControlEvents:UIControlEventTouchUpInside];
[self.view insertSubview:self.oButton aboveSubview:self.view];
}
// to make the button float over the tableView including tableHeader
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGRect tableBounds = self.tableView.bounds; // should be _magTableView, but works with _tableView as well. But I do not know where this _tableView comes from...
//CGRect tableBounds = self.magTableView.bounds;
// floating Button;
CGRect floatingButtonFrame = self.oButton.frame;
floatingButtonFrame.origin.y = self.originalOrigin + tableBounds.origin.y;
self.oButton.frame = floatingButtonFrame;
[self.view bringSubviewToFront:self.oButton]; // float over the tableHeader
}
ViewController.h
#import <UIKit/UIKit.h>
#import "SingletonClass.h"
#interface DetailViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
#property (weak, nonatomic) IBOutlet UITableView *tableView;
#property (strong, nonatomic) UIButton *oButton;
#property (nonatomic) float originalOrigin;
#end
ViewController.m - Jumping Button, not wanted behaviour (Update: works no, no jumping anymore)
- (void)viewDidLoad
{
[super viewDidLoad];
self.originalOrigin = [[SingletonClass sharedInstance] photoButtonY]; // 430.0
[self addOverlayButton];
[self initTableView]; // initiate the tableview and works properly
}
#pragma mark Camera Button
- (void)addOverlayButton {
self.oButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.oButton.frame = CGRectMake(132.0, self.originalOrigin, 56.0, 56.0);
[self.oButton setImage:[UIImage imageNamed:#"CameraButton56x56.png"] forState:UIControlStateNormal];
[self.oButton addTarget:self action:#selector(toCameraView:) forControlEvents:UIControlEventTouchUpInside];
[self.view insertSubview:self.oButton aboveSubview:self.view];
}
/** Remove this function and the button stayed where I expected it
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGRect tableBounds = self.tableView.bounds;
// floating Button;
CGRect floatingButtonFrame = self.oButton.frame;
floatingButtonFrame.origin.y = self.originalOrigin + tableBounds.origin.y;
self.oButton.frame = floatingButtonFrame;
[self.view bringSubviewToFront:self.oButton]; // float over the tableHeader
}
*/