CODEWITHSUNDEEP
objective-cxcodebuttonoverlayfloating
jerik
jerik

Reputation: 5767

How to implement a overlay button which is floating over the content view

in some iPhone apps i saw a button which was floating over the content view, eg. in the app EyeEm. When the user is scrolling the content, the button remains where it is and is still an interaction element.Overlay Button which is floating over the content view

Ho do I implement this?

My approach would be:

edit:

The floating seems to be the default behavior. Interestingly addSubview and insertSubview have the same behavior when placing the button... both are floating over the content.

- (void)addOverlayButton {
UIButton *oButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[oButton addTarget:self
           action:@selector(aMethod:)
           forControlEvents:UIControlEventTouchDown];
[oButton setTitle:@"Show View" forState:UIControlStateNormal];
oButton.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[self.view addSubview:oButton];
//[self.view insertSubview:oButton aboveSubview:_scrollView];  // same result as addSubview. 
// Both solutions let the button float over the content. 
}

Upvotes: 5

Views: 3637

Answers (2)

p.balmasov
p.balmasov

Reputation: 357

if you using storyboard just add button over it, like that

if you want to do with code insertSubview:buttonView aboveSubview:scrollView

no matters its table or scroll view

Upvotes: 0

silvansky
silvansky

Reputation: 2427

Add a subview to your window's content view with insertSubview:aboveSubview: method with your button and scrollview as arguments, but be careful: if two sibling views both have transparency, the resulting drawing behaviour is undefined.

Upvotes: 3

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