I am using cbpowell/MarqueeLabel class in my project. I changed the class of a Label from UILabel to MarqeeLabel. This got my Label to scroll. But it is in its Default MLLeftRight. I need to change it to MLContinous. How can I make this happen? I tried add a User Defined RunTime attribute, but that doesn't work. I cannot add "marqueeType" in the program, because my label is still in the UILabel class instead of MarqueeLabel, so can only access the methods for UILabel.
Anyone with experience in MarqueeLabel, please advice.
Or if you can tell me, how I can access the methods of a custom class I set(here- MarqueeLabel) for my label (instead of- UILabel)
You can create an IBOutlet for MarqueeLabel like
#property (weak, nonatomic) IBOutlet MarqueeLabel *mLabel;
Since it deoesn't support IBInspectable for marqueeType, you can configure label like
self.mLabel.marqueeType = MLLeftRight;
We are in the process of implementing IBInspectable into a large app in hopes of allowing some settings to be set in Interface Builder to reduce the amount of code in our views. I don't have much experience with IBInspectable/IBDesignable and am looking for some answers and/or clarification on what I'm doing wrong.
I have declared a property in a UITableViewCell subclass as follows:
#property (nonatomic,strong) IBInspectable UIColor* backgroundColor;
When declaring the property like this, I get an option to set that color in Interface Builder > Attributes Inspector, which is to be expected. However when I set the color, the value for _backgroundColor is nil at runtime.
[_labelLoginBackground setBackgroundColor:_backgroundColor];
Could someone clarify what might be going here? Thanks!
UITableViewCell is a subclass of UIView, which already contains a property named "backgroundColor". Do 1 of the following:
Rename your own "backgroundColor" property to "loginBackgroundColor" and start debugging from there.
OR
Do not create a redundant property. Set the background color using the selection widget that is already present in Interface Builder before you ever add IBInspectable.
I want to create a sub-class of UIButton. I want to give some extra functionality there. Here in this class i am using the enum also like as UIButtonType in the UIButton class. I want to show this option in the storyboad UI also, from where developer can select the type of custom button class. Please suggest me, how I can achieve this.
You need to specify your UIButton inherited class as IBDesignable and to add a NSInteger IBInspectable property that will be analyzed by InterfaceBuilder in order to be displayed.
However, Interface Builder can not render a enum type IBInspectable property; that's why the only way to achieve this is an NSInteger property.
Finally you will select a integer value in interface builder for your custom button (0, 1 ... YourEnumMaxValue) that corresponds to the enum value. At last, you just need to implement some code to render your button following the choosen value in IB.
More on LiveRendering : Creating a Custom View That Renders in Interface Builder
I've got a handful of UIViews subclasses as a part of my interface and I'm looking for an easy human readable way to differentiate them in the code -- like the label you set in the "Document" section of the UI editor.
I believe the "Accessibility Label" is exposed, but that doesn't seem like the correct use of that variable.
Am I stuck documenting which Object ID each object has or is there a more intelligible way?
There are lots of ways to do what you want to be done. Here are several of them:
#properties
The first thing that came to my mind are properties. Use your view controller as a storage class by adding following property declarations in your header file:
#property (nonatomic, weak) IBOutlet UIView *myFantasticView;
#property (nonatomic, weak) IBOutlet UIView *myGorgeousView;
...
Then, just simply connect your views to specific outlets in Interface Builder.
The only drawback is that you will have to declare a lot of properties which can become a little confusing.
Custom runtime attributes (another use of #properties)
If you're using UIView's subclasses (I assume you do), you can use your UIView subclass and declare an "identifier" property:
#interface MyView : UIView
#property (nonatomic, strong) NSString *myViewID;
...
#end
Then, assign this value using code (simple property setting) or in Interface Builder:
Now you can identify your views using one of those method. But remember that you can come up with a better, more suitable solution! :)
I'm currently refactoring a couple of view controllers that share a few IBOutlets and IBAction methods. I moved the outlet declarations and the IBAction method into a superclass, cutting these out of the subclasses.
Now, when I open up Interface Builder, I find that I can't see the outlets or actions declared in the superclass. The connections still exist, as I'd wired them up before the refactoring, but they're grayed out. (It's important to note that the connections also WORK, as my action fires on a button press, and my outlets are modified properly.)
The question is, how can I get interface builder to recognize outlets from a superclass? Is this possible, and, if not, what do you all recommend?
(Just for fun, here's my superclass header file:)
#interface TFMainViewController : UIViewController {
UIImageView *logoImage, *thinkfunImage;
UIButton *buyFullButton;
}
#property (nonatomic, retain) IBOutlet UIImageView *logoImage, *thinkfunImage;
#property (nonatomic, retain) IBOutlet UIButton *buyFullButton;
-(IBAction) buyFullVersion;
#end
EDIT: in case anyone's wondering, I'm using Xcode and IB 3.2.5, with the iOS 4.2 SDK.
I didn't realize it was even possible to connect to superclasses in interface builder until about an hour ago. Since this was the only question I could find regarding how to do this, I'll add my answer, even though this question is old. My answer is with regard to Xcode 4, not Xcode 3.
As far as I can tell, you can't connect to outlets in a superclass using the assistant editor, but you can do it by clicking on "File's Owner" in IB. That should show all the outlets in Utilities->Connections Inspector. You can then Ctrl+Click on the outlet in the inspector (click on the '+' sign), and drag it over to your view in IB.
The solution for the problem with the IBOutlet .. is to change the class type to the Base Class in the identity inspector
connect using Control + drag and drop and
change it back to the child class
This works for me
BTW: i used Xcode 6
IB should be able to see outlets from superclasses, I have done this a number of times with no issues. Are you sure you are importing the superclass correctly (using #import instead of #class)? IB needs some way to track back to the superclass.
Switching between the super and subclass in the identity inspector allows you to connect your outlets across the classes. The only issue I found is when you attempt to do this with a UITableViewCell and its subclass. I wanted to re-assign the default textLabel and detailTextLabel instances to labels I create in Interface Builder. The workaround is to create substitute labels and then override the getters to point to these instead.
I'm pretty sure that IB only looks at the actual class you're using to find outlets, and not at superclasses. I think that the easiest solution would be to leave the instance variable declarations in the superclass, but duplicate the #property lines in each subclass.
I'm doing this in XCode 3.2.6. I started with outlets connected to a class, and then made a subclass with additional outlets. When I changed the File's Owner class to the subclass, IB showed the superclass outlets as greyed out. I switched File's Owner to the superclass, then back to the subclass and now all outlets are showing not greyed out.
The simplest way: create interface and implementation files for your subclass(es)!
Perfect example: Juggleware's awesome ShadowButton Subclass of UIButton.
Make sure to create the .h & .m files in your project.
NOTE: There is no need to #import the header files at all since this is simply a class instance of UIButton.
In Interface Builder:
Select the element you which to connect.
Go to Utilities -> Identity Inspector
Change the Class to your subclass (or superclass). NOTE: You might have to type in your subclass name and hit ENTER.
You're done!
Even if you have declared a basic class (UIButton) as IBOutlet in your header file like so...
// YourViewController.h
#interface YourViewController : UIViewController {
IBOutlet UIButton *mybutton;
}
...the class you've set in Interface Builder (ShadowButton) will overwrite it since it's in the view layer.
The best part about this approach is that your code doesn't have any messy dependency issues.
On the project I am currently working, we have a BaseViewController with a UIScrollView as IBOutlet and handles keyboard appearance/disappearance events and slides the content accordingly. At first, I could not connect to that IBOutlet, than solved the problem like this, which is similar to Sosily's answer:
BaseViewController has an IBOutlet, called contentScrollView. I can see 5 previously connected outlets, which are UIScrollViews on other UIViewControllers, created by people who previously worked on the project
I tried to connect my UIScrollView as the contentScrollView. Although my UIViewController is a subclass of BaseViewController, I cannot connect it.
I tried to connect already connected UIScrollViews as the contentScrollView. Although all UIViewControllers are subclasses of BaseViewController, I cannot connect them again, as well. So, I started to look for a trick.
I have created the same contentScrollView IBOutlet on my own UIViewController, connected the scrollView to my own contentScrollView outlet and removed the one that I have just created.
Now the scrollView is connected as contentScrollView to File's Owner, but the only contentScrollView belongs to the BaseViewController. Tested and verified that keyboard events are handled correctly.
I ran into a similar problem with a superclass, but it was due to a bug in Xcode (8.2) where Interface Builder doesn't show outlets in the Connection Inspector if those outlets have been declared with a _Nullable type annotation for Swift compatibility.
Using nullable inside #property's parentheses appears to work around the problem.
This Xcode bug seems to affect outlets in any class (ie. not just superclasses).
I had the same problem, and it turns out it was because in the superclass I had the IBOutlets declared as "_Nullable".
Example:
#property (nonatomic, strong) IBOutlet UITableView *_Nullable mySuperTableView;
When I removed the _Nullable, suddenly the IBOutlets reappeared in IB and all was good again.
(I had only set them to _Nullable because Xcode was complaining "pointer is missing a nullability type specifier"... (don't know why). )