When rotating a View from UIInterfaceOrientationPortrait to UIInterfaceOrientationPortraitUpsideDown on the iPad simulator, there is a white border along one side of the view (see diagram, lower left of the image). The white border shows only on one side, but not the opposite side. How can I prevent (hide) it? Thanks!
This is a guess:
It's possible that one of your views has a backgroundColor set to white, and it is completely covered by another view. During a rotation, perhaps floating point errors cause one border to show slightly through that edge.
To investigate this case, you can use the undocumented method [UIView recursiveDescription] to get a quick look at your view hierarchy (no need to submit code with that method, it's just for debugging). Once you know which views are near the bottom, you can print out their backgroundColors, or just set them all to [UIColor clearColor].
Also, I'm guessing you already know this one, but it can be useful to set window.backgroundColor = [UIColor clearColor] at the start of your code!
I had the same issue. I saw that in Interface builder autosizing for the view could not be enabled. I deleted the .xib and re-created it making sure product was set to "ipad" when creating the file (add new file in xcode).
You can also set the background color to nil. From the UIView documentation for backgroundColor:
The default value is nil, which results in a transparent background
color.
UIWindow inherits from UIView, so this works as well. Probably a good idea to use nil, in case [UIColor clearColor] isn't always the best way to do it.
The funny thing is, I have a project with no nibs, so I create the UIWindow in code, but the background color was white before I set it to nil. is the default background color of a programmatically created UIWindow white?
Related
I have a MKMapView in a UIView. Never any issues until iOS7. My colors for UITabbar and UINavigationBars are set by UIAppearance Protocol.
For some reason whenever the MKMapView is initiated, all my tabbars and navbars reset, ignoring the barTintColor setting of my appearance class. All other settings from UIAppearance seem to remain such as title attributes and barItem attributes. Only barTintColor goes out.
One more thing. This only happens on iPhone 4 and iPhone4S, not on iPhone 5. It does not happen on the simulator either. Was not an issue in iOS6 at all.
I can find no other cause for the reset. I went through and commented out just about all the goings on and it had no effect either way.
If I delete the MKMapView control, no reset of colors. If I then go on to present another, altogether different view with an MKMapView, again the colors reset.
I am looking for ideas of what else to check, what kind of settings or methods could possibly cause this behavior. Give me some stuff to eliminate, I am stuck.
Additional Info:
Now thinking this may be a bug. I put a line to hard code the color of the navbar to an arbitrary color in ViewDidLoad just to see what is going on.
UINavigationBar *bar = self.navigationController.navigationBar;
[bar setBarTintColor = [UIColor GreenColor];
I put a break on the next line. Inspecting bar, the color seems to be set.
On iPhone4 or 4S, bar does not turn green. On iPhone5 and simulator, bar turns green.
Some more items I have discovered. The color is not changing. It appears the visibility is. Yet, reading the alpha of the color and of the bar returns 1.0 both.
So color is correct.
Translucency is yes.
Alpha is 1.0.
And yet the bar is completely clear, no color, no tint.
I think I will file this officially as a bug. I made a test viewController with only a MKMapview. No code, no delegate, no annotations. Presented that in place of my proper controller. The same thing happened.
What I need right now is a workaround. I just cannot tell what is changing. When I inspect the properties of the navigation bar, everything is correct. Tint color, translucency, bar Tint Color, alpha value. So far as I can tell, the thing should be displaying as intended.
Can anyone tell me other properties or methods that could make the background of the navigation bar completely transparent?
After some more searching I see that there are some related threads in the developer forums and this issue has been noted for some time. I expect I will receive response that my bug report is a dupe. In the meantime, I believe I have come up with a workaround.
What I came up with is a sequence of setting
self.navigationController.navigationBar.translucent = NO;
self.tabBarController.tabBar.translucent = NO;
when the view containing a MKMapView is loaded and then setting it YES in viewDidAppear. I set to NO again on viewWillDisappear. Then the returning viewController must reset to translucent again in its viewDidAppear.
I used a series of NSNotification posts in the View Controllers with the maps. I subclassed my navigation controllers and tab bar to make them listen for the notification and respond by toggling their own bar translucency property.
Managed to get it done. With a small amount of code, but it is an awful lot of activity for no good reason. Would more like to see this fixed ASAP.
I created two views that has its transition controlled by a navigation view controller. I have a UIView which contain a UISearchBar. The UIView is then set as the navigation bar's titleView in the first view.
Now, the problem is, whenever I go from the first view to the second view, I can see a light background behind the UISearchBar fading in and out.
I have did a bit of troubleshooting of my own and found that the background belongs to the UISearchBar and not the UIView that contains it. I have also tried many codes to make the UISearchBar background transparent, but none of the codes actually makes it transparent.
Edit: I did a bit more fiddling and found that the colour fading in and out is the colour from the style/tint of the UISearchBar. So if I change the tint to black, it'll darken instead. The only way I see I can fix this is to turn the background of the UISearchBar's alpha to 0, but I can't find any code that can change the alpha of a UISearchBar in a UINavigationBar.
Edit: I really can't find any code to turn the background tint of the UISearchBar to be alpha 0. Does anyone have a workaround or an alternative solution to this?
I realised that the bar is actually the scope bar's background. I'm not sure why it still showed up even though I disabled it. My solution was to set the background image as a transparent image.
[self.searchBar setScopeBarBackgroundImage:[UIImage imageNamed:#"transpixel.png"]];
How can i remove the UINavigationController top rounded corners?Is there any plist property or i need to do this programmatically?
I want to go from this:
To this:
Just change the status bar style from "Black Opaque" to "Black Translucent" and all 4 corners of your rootViewController won't be rounded anymore. As long as you don't set your view controller's property wantsFullScreenLayout = YES nothing will be drawn behind the status bar. Your UIWindow must have backgroundColor = [UIColor blackColor] so the user can't notice that the status bar isn't real "Black Opaque".
Well, the default look is the look in the image on the bottom. So what did you do, to get the look of the top image in the first place? My guess is, that you use an image as the background of the UINavigationBar. Find the image and replace it with a version without rounded corners.
An alternative is a UINavigationBar subclass. In that case you might look for that subclass and see if there is a line similar to [self.layer setCornerRadius:3.0] and remove it.
I believe Sascha may be correct when he says that rounded corners are automatically added when you use a black status bar. I noticed that in one of my new apps, my UINavigationController had rounded corners and a black status bar, even though i had not set it in the xib file, the info.plist file or even the App Delegate.
I did a quick test and swapped the image I was using for the UINavigationController/NavigationBar background and discovered that the nav bar color was automatically affecting the status bar, which in turn was rounding the corners of the nav bar (weird)
See snapshots of my nav bar (The rounded corners are being generated purely by virtue of the color of the image I am using as my UINavigationController's background!)
So I guess in your case - One suggestion would have been to try a different color background and see if you have the same results as I did.
I have a problem where my UITableView (group style) has a black "tip" above it's rounded corner.
I'm setting up the background of the tableview like so:
[meetingTableView setBackgroundColor:[[UIColor alloc] initWithPatternImage:[[UIImage alloc] initWithContentsOfFile:#"background.png"]]];
And my table view ends up looking like this:
black pointy edge on rounded corner http://papernapkin.org/pastebin/resource/images/imageEntryId/6487
Any ideas how I can get rid of those black points?
I have got the same problem.
When I set clear color by xib, I have the back corner
The solution is to set it by code !
(The same problem with interface builder exist for webviews)
Try this in your controller's viewDidLoad method:
meetingTableView.backgroundColor = [UIColor clearColor];
You'll get Black corners on UITableView Group Style if you set background color to clear color in XIB.
Instead try this code for removing Black corners on UITableView Group Style
tableViewObject.backgroundColor=[UIColor clearColor];
Just in case you weren't already aware, there's another neat technique you can use to make customized backgrounds for UITableViews:
Not quite as simple as setting the background as you're doing, but it gives you a lot more flexibility and can scale to any table size.
Maybe if you put yourTableViewOutlet.backgroundView=nil;
To avoid the black corners you have to make sure that the UITableViewCells are not opaque. It looks like you're using custom styles table cells and the default value for opaque is YES. Either go to Interface Builder and uncheck the opaque checkbox if the table cell was set up in a XIB file. Or use the setOpaque:NO setter to change value.
Because the table cell view still has a rectangular frame even with the rounded corners the cell view and not the actual table view is causing those black corners.
My guess is that it's related to something that you're doing in your custom table view cells. You might want to experiment with setting the cell background color to [UIColor clearColor].
I think you should set the background color of your table as clearColor and initialsie your view with the background image.
Then it will definitely not show the black corners. But also don't forget to set the background color of your cell as white color
The up-voted answer above (set the tableView's background to [UIColor clearColor]) may not work for you if you are like me and never use the UITableViewController, instead putting a UITableView inside a UIViewController.
In this case it's not the tableView that needs to have a clear background, but the view that holds the tableview.
This is not intuitive, but it works for me. In interface builder you can just set the parent view's background color to clear color, or you could do the same in code in viewDidLoad with:
self.view.backgroundColor = [UIColor clearColor];
I'm guessing the reason for the black corners is something about the internal graphics optimization, and setting the background clear fixes it.
I have 2 views which transition into each other using the ...
[UIView setAnimationTransition:UIAnimationTransitionFlipFromLeft forView:self.view cache:YES]
My views both have a black background and when they flip over the colour underneath is white. I want to change this to something else. How do I do this? I have tried searching but I am not really sure which search terms to use.
I think what you are looking for is changing the background color of your application window (which is visible between the flipside views). You can do this
either in the Interface Builder in the MainWindow.xib, Tab 1 of the Inspector
or in code with
window.backgroundColor = [UIColor redColor];
thanks! Very anti-intuitive. I'd think the superview's background color would show but I'd be wrong ;)