UISlider disappearing when calling setValue with 0

Posted by Kai on Stack Overflow See other posts from Stack Overflow or by Kai
Published on 2010-04-14T04:04:40Z Indexed on 2010/04/14 4:13 UTC
Read the original article Hit count: 344

Filed under:

uislider

|

setvalue

I have several UISliders in my application which all work fine until I call the following code:

...
frame = CGRectMake(43, 210, 201, 23);
mySlider = [[UISlider alloc] initWithFrame:frame];
[mySlider addTarget:self action:@selector(sliderUpdate:) forControlEvents:UIControlEventValueChanged];
mySlider.minimumValue = 0.0;
mySlider.maximumValue = 1.0;
mySlider.continuous = YES;
tempNum = [myArray objectAtIndex:2];
mySlider.value = [tempNum floatValue]; // only breaks if value is 0
[self.view addSubview:mySlider];
...

For some reason the slider doesn't show up unless mySlider.value is set to greater than 0. The only workaround I've found so far is to set it to an extremely small value (such as 0.000000001), which makes the slider appear as expected. Does anyone have any idea why this might be happening and how it can be fixed?

© Stack Overflow or respective owner

Related posts about uislider

UISlider increments

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I have a UISlider that slides with a range from 0.0 to 1.0. Out of the box, the slider lets users slide with a really high number of fraction digits, but I only want my users to be able to increment/decrement by .001 for each "tick" up or down of the slider. Is this possible to set up? Thank… >>> More
iPhone: Activate UISlider and set its value to the location of the current touch programatically

as seen on Stack Overflow - Search for 'Stack Overflow'
Is it possible to set an UISlider as first responder and set its current value to the location of the current touch programatically? The way my app is set up I have a UIView container that takes up the whole screen. Inside the container I have another UIView offscreen at the bottom edge (I'll call… >>> More
Change iPhone UISlider bar image.

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everyone! My first question on stackoverflow! I'm using a UISlider in my app but I'd like to use a custom "look-and-feel" for it. I have changed the thumb to my own image but is there a way to change the bar also? I have a bar image I would like to use but can't see how to do this. I have… >>> More
uiButton should always be as top view in iPhone

as seen on Stack Overflow - Search for 'Stack Overflow'
hello, i have a UIView UIImageview UIButton and UISlider added as subview to UIView example: [view addsubview:uiImageview_obj]; [view addsubview:uiButtonview_obj]; [view addsubview:uiSliderview_obj]; When i zoom the uiimageview_obj, it covers uislider and uibutton also, hence i cannot use uislider… >>> More
uiSlider thumb graphic 'flashes' when dragging uiScrollview on 1st gen 3.1.3

as seen on Stack Overflow - Search for 'Stack Overflow'
I have added my own thumb to a uiSlider and added a 1px x 1px transparent .png to the tracks (I don't want to see the tracks) (I have also tried setting tracks to nil). My uiSlider is also rotated to vertical. The uiSlider sits over a uiScrollView but is not 'attached' to that view. There are numerous… >>> More

Related posts about setvalue

UISlider disappearing when calling setValue with 0

as seen on Stack Overflow - Search for 'Stack Overflow'
I have several UISliders in my application which all work fine until I call the following code: ... frame = CGRectMake(43, 210, 201, 23); mySlider = [[UISlider alloc] initWithFrame:frame]; [mySlider addTarget:self action:@selector(sliderUpdate:) forControlEvents:UIControlEventValueChanged]; mySlider… >>> More
Light on every model and not in the whole scene

as seen on Game Development - Search for 'Game Development'
I am using a custom shader and try to pass the effect on my Models like that: foreach (ModelMesh mesh in Model.Meshes) { foreach (ModelMeshPart part in mesh.MeshParts) { part.Effect = effect; } mesh.Draw(); } My only issue is that every Model now has its own… >>> More
Reflection - SetValue of array within class?

as seen on Stack Overflow - Search for 'Stack Overflow'
OK, I've been working on something for a while now, using reflection to accomplish a lot of what I need to do, but I've hit a bit of a stumbling block... I'm trying to use reflection to populate the properties of an array of a child property... not sure that's clear, so it's probably best explained… >>> More
Workflow Foundation (WF) -- Why does setting a DependencyProperty to a COM object using SetValue() t

as seen on Stack Overflow - Search for 'Stack Overflow'
Assume that I have a .NET Workflow Foundation (WF) SequenceActivity class with the following property: public IWorkspace Workspace { get; set; } // ^^^^^^^^^^ // important: this is a COM interface type! public static DependencyProperty WorkspaceProperty = DependencyProperty.Register( … >>> More
Field.SetValue alternative

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there any. I just ran the new perf analysis tool of vs2010 and as it turns out this func consumes most of the cpu resources. Is there something else i can use? >>> More