just switched to iOS 4 on my iPhone 3GS and some of my apps broke.
One issue I had is that I had a UIToolbar with some buttons, tinted to pink, that worked well on the 3.1.3 OS. After upgrading to iOS 4, the toolbar was still tinted, but the buttons it contained were no longer affected by the tint. The toolbar was pink while the buttons were regular-blue.
Looked around for it on the net, but found no reference of such a thing.
Anyone knows what broke in the process?
(must be frank here - I knew the answer before posting, just didn't know how to load this data to StackOverflow. Thought the solution I found was valuable for others, so wanted to post it here. I'm new here, so please no harsh critics :) )
So eventually the problem resulted from, AFAICT, a change in behavior in the OS.
As stated the tint code worked before the upgrade and was written like this:
// Toolbar content
NSArray *items=[NSArray arrayWithObjects: ... ]; // PSEUDO CODE HERE
[toolbar setItems:items];
// Add tint
toolbar.tintColor = [UIColor colorWithRed:0.83 green:0.43 blue:0.57 alpha:0.5];
What I needed to do, was just reverse the order of things:
// Add tint
toolbar.tintColor = [UIColor colorWithRed:0.83 green:0.43 blue:0.57 alpha:0.5];
// Toolbar content
NSArray *items=[NSArray arrayWithObjects: ... ]; // PSEUDO CODE HERE
[toolbar setItems:items];
(If you created UIToolbar in Interface Builder, you can change it's tint there, and that applies for the buttons as well).
I guess the tint updated all buttons before iOS 4, while in iOS 4 it doesn't and when adding buttons, they check for existing tint. But this is just a guess. The solution works anyhow..
Hope this helps someone, and that I didn't violate any sacred SO rules...
Cheers!
Well, it seems more like an OS bug than a feature, since navigation bars do change their item's color when you set their tintColor.
We've found that if you change the item's style, it refreshes their color as a side effect. Doing the following worked in our case. The original buttons are bordered, so we change them to plain and set them to bordered again. You may do a more complicated and generic code that saves the current style, sets another one and then switchs back. I am just to lazy to do that. :D Anyway, you get the idea.
toolbar.tintColor = //<some dynamically obtained UIColor>
// Workaround to properly set the UIBarButtonItem's tint color in iOS 4
for (UIBarButtonItem * item in toolbar.items)
{
item.style = UIBarButtonItemStylePlain;
item.style = UIBarButtonItemStyleBordered;
}
Regards,
Rula.
Related
I have been looking everywhere on here and Google, but I still have this weird issue that I can't figure. I have an app pictures below, with 4 UIButtons that have a background image applied:
When I resize/run on the iPhone 5, the top button resizes in a very strange way:
How do I get all the UIButtons to resize the same way with the iPhone 5? Is it possible? Do I need to use a different method?
I really hope this is not a duplicate, but I am completely stumped. If I change the UIButtons around in other positions along the UIView, a different one will resize, or strange gap spacing will show up.... I don't understand. Thanks for any help!
EDIT: I am using iOS 6 on Xcode 4.5. I am testing on an iPhone 4S and an iPhone 5. I have AutoLayout checked. If I use Pin (just found it) I can get the UIButton to keep its height.
To clarify my question. I want the UIButtons to resize so they occupy the same percentage of the screen.... I want the proportions to be the same, instead of simply adding a bunch of empty space. I hope that make it more clear
One of the features you can use is called AutoLayout. Its provided with Xcode to make it easier adjusting things for the 4 inch screen. You can find a good example here: http://www.raywenderlich.com/20881/beginning-auto-layout-part-1-of-2
But as far as I know AutoLayout works only with iOS 6 which makes it "not so useful yet". I have been using a class called UIDevice, source of which can be found here: https://github.com/erica/uidevice-extension and check if the platform type is iPhone 5. I have it set up in a method which setups GUI when the view loads. Example of my implementation:
UIImage *backgroundImage;
if ([[UIDevice currentDevice] platformType] == UIDevice5iPhone)
{
//I have a 4 inch screen present
myButton.frame = CGRectMake(x, y, w, h); //Set the frame as you would like it to look on the iPhone 5
backgroundImage = [[UIImage alloc] initWithCGImage:[UIImage imageNamed:#"main_background-568h#2x"].CGImage scale:2.0 orientation:UIImageOrientationUp];
}
else
{
//I have a 3.5 inch screen present
myButton.frame = CGRectMake(x, y, w, h); //Set the frame as you would like it to look on the iPhone 3, 3gs, 4, 4s...
backgroundImage = [[UIImage imageNamed:#"main_background"] retain];
}
self.view.backgroundColor = [UIColor colorWithPatternImage:backgroundImage];
[backgroundImage release];
Hope it clears a bit.
you should firstly disable the use AutoLayout this option is under the "Show the file inspector"
Our designer asked me to use specific color for text of disabled UIBarButtonItems. That code I've used to implement this:
NSDictionary* textAttributes = [NSDictionary dictionaryWithObject: [UIColor blueColor]
forKey: UITextAttributeTextColor];
[[UIBarButtonItem appearance] setTitleTextAttributes: textAttributes
forState: UIControlStateDisabled];
But it doesn't changed text attributes.
I've tried this code with Normal state, tried to chage background for UIControlStateDisabled buttons with setBackgroundImage and all thouse experiments works perfectly. But this single combination: setTitleTextAttributes and UIControlStateDisabled doesn't do anything.
Google didn't give me any relevant answer about that specific combination.
Does anybody know other way to change color of disabled UIBarButtonItem or way to make setTitleTextAttributes work for diabled items?
You have to set it for both control state Normal and Disabled.
(2015-11-18 -- As of iOS 9.1 you must still set both.)
It's working fine for me with iOS 5.1. Perhaps it was a 5.0 bug.
I have seen many times waiting panels (panels with a uiactivityindicatorview) black/dark with some transparency and white labels.
Like this one :
I guess it is a standard element.
Where can I find it?
Try This. it's the best solution I came across to show the activity. MBProgressHUD
MBProgressHUD looks nice. You might want to check out http://code.google.com/p/toast-notifications-ios/ too.
There's no iOS component that does this.
If you don't want to include an external library just for this one component then you can do it using UI components.
/* Warning, typed from memory */
// Create the UIView that's the background
UIView *pleaseWaitView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 80)];
[pleaseWaitView setBackgroundColor:[UIColor colorWithWhite:0.5 alpha:0.5]];
[[pleaseWaitView layer] setCornerRadius:5.0f];
// And create an activity indicator
UIActivityIndicator *i = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[i startAnimating];
[pleaseWaitView addSubview:i];
[i release];
// Add it to the main view (in the middle)
[pleaseWaitView setCenter:CGPointMake(self.view.bounds.size.width/2, self.view.bounds.size.height/2)];
[self.view addSubview:pleaseWaitView];
You can add a UILabel with whatever text you want (in your case, 'Authenticating') in the same way as you added the activity indicator.
The tricky part is setting the corner radius - you will probably need this at the top of your .m file :
#import <QuartzCore/QuartzCore.h>
NB You can do this in interface builder as well if you want (apart from the corner radius bit!) ;)
I answered a question that included an overlay like this. I included the code and the overlay image you need to do it with. Take a look at this answer and take a look at the screen shot it created. I use this overlay as I send email in the background so you will want to edit the code to do your function but the overlay code is already in place.
Locking the Fields in MFMailComposeViewController
Happy Coding!
Check out DSActivityView. I've successfully used it in a few of my projects.
As by now there is no standard UIElement for that in iOS.
But checkout this library:
In my code I am using a UISegmentedControl as a "button" with only ONE segment and the momentary property set to YES. In versions of the SDK prior to iOS 4, this was not a problem, but it appears that now iOS 4 requires that there be at least 2 segments. The following code throws an exception:
NSArray *titles = [NSArray arrayWithObject:#"Button Title"];
myButton = [[UISegmentedControl alloc] initWithItems:titles];
and now in Interface Builder you cannot even create a UISegmentedControl with less than 2 segments. It logs the following error when building:
"The number of segments property of a segmented control must be greater than or equal to 2."
I'm kinda stumped. Any work arounds for this? I tried to create a UISegmentedControl with two buttons and then remove one programmatically and that "works" as it doesn't cause the app to crash. I get a button in iOS 3 and nothing in iOS 4. Any ideas?
Have you tried this:
[myButton removeAllSegments];
[myButton insertSegmentWithTitle:#"Press this" atIndex:0 animated:NO];
Really strange. It still works fine for me both in iOS4 simulator and device (this is a real working snippet from my code):
NSArray *laterContent = [NSArray arrayWithObjects: #"Maybe later", nil];
UISegmentedControl *later = [[UISegmentedControl alloc] initWithItems:laterContent];
CGRect frame = CGRectMake( 20,
98,
self.alert.bounds.size.width/2 - 30,
30);
later.frame = frame;
later.selectedSegmentIndex = -1;
[later addTarget:self action:#selector(laterAction:) forControlEvents:UIControlEventValueChanged];
later.segmentedControlStyle = UISegmentedControlStyleBar;
later.tintColor = [UIColor colorWithRed:130.0f/255.0f green:74.0f/255.0f blue:54.0f/255.0f alpha:0.8f];
later.momentary = YES;
later.alpha = 0.9;
It's not exactly a code-related solution but: I hit a similar issue and ended up drawing my own similar looking resources in Photoshop. It was not terribly difficult to do and removed a particular bad "code smell", IMO.
I found if you have a previous project with a single-segment UISegmentedControl, you can open both that project and your new one in Interface Builder and drag (or copy/paste) the single-segment UISegmentedControl to your new view controller. It will work fine in both your app and Interface Builder, just don't change the number of segments from 1 to anything else as it won't let you go back. I'm using Xcode 4.6.2 and iOS 6.
The editor in Interface Builder won't let you change the number of segments to be less than 1, but you can make a segmented control in IB by editing the .xib xml manually.
Right click on the .xib containing the segmented control
Choose Open As -> Source Code from the popup menu.
Find "<segments> which is the beginning of the xml array of segments. The whole thing should look like:
<segments>
<segment title="Segment 1 Title"/>
<segment title="Segment 2 Title"/>
</segments>
Just delete <segment title="Segment 2 Title"/> so there is only one segment element.
Right click the .xib again and choose Open As -> Interface Builder - iOS to go back to interface builder.
You should also probably set the segmented control to "momentary" mode.
I don't get any errors compiling or running this. Of course, this is a hack, and may break things in some circumstances or in a future iOS release.
Well two possibilities:
1) Create a button and the set background image as the single dot of the UISegmentedControl
If your SegmentedControl is a class variable just replace the #property
#property (nonatomic, retain) IBOutlet UIButton *button;
In the viewDidLoad-function add the following
-(void) viewDidLoad
{
[super viewDidLoad];
...
self.button = [UIButton alloc] init];
[self.button setBackgroundImage:[UIImage imageNamed:#"segmentedDot.png"] forState:(UIControlState)UIControlStateNormal];
}
2) Set the amount of segments to three of your UISegmentedControl and afterwards set the width to 20 - now only the dot in the middle will be shown.
Dont forget, if the user interacts with the UISegmentedControl, set the currentElement again to the second segment, else the dot will be in light grey instead of white state.
3) Place a button or a small view over the unwanted second dot of the UISegmentedControl in InterfaceBuilder. Make sure the backgroundcolor is even.
When you are using a button set the state for "user interaction" in attribute inspector to disabled. As type I would chose "custom" since you won't have some borders in your button ;)
Now male again sure, that always the first dot is the active Element.
However I think solution one should be the way you should go, since Apple thought something about it, when they disabled the 1-dot-SegmentedControl. Since you are using the Control as a button the Element you are looking fpr should be a button. ;)
There's no workaround in iOS 4. If you need this functionality, file a bug (enhancement request) at bugreport.apple.com.
You can also use removeSegmentAtIndex:animated:. If you create a segmented control in a storyboard or xib with two segments, you can remove one like this:
[self.sortButton removeSegmentAtIndex:1 animated:NO];
Our designers want to change the color of the default UITabBar. Of course they do.
They want the background to be green, and the icon highlights to be white, as opposed to the black/blue default color scheme.
Anyone have any experience or suggestions to do this?
You have to subclass the UITabBarController and implement custom drawing.
Check out this SO question. Changing Tint / Background color of UITabBar
Since iOS5 is released, you can now use the property tintColor.
i.e.:
tabBar.tintColor = [UIColor greenColor];
I have try this one and its working for me!!!
[self.TabBarController.tabBar setTintColor:[UIColor colorWithRed:0.1294 green:0.5686 blue:0.8353 alpha:1.0]];
[self.TabBarController.tabBar setTintColor:[UIColor "YOUR COLOR"];
Hope it'll help you also!!!
iOS 5.0 fixes this issue but the solution is under NDA. Look up UITabBar in your documentation for an EASY way to do what you want to do.
Be careful. If your app is going for submission to the app store, Apple may reject it if you're modifying their prescribed color scheme.
Theres a useful link here: http://duivesteyn.net/2010/01/16/iphone-custom-tabbar-background-image/
This can be done with a little private API hacking.