This question boggles my mind and I cannot find an answer. I looked all over the documentation, tried out code, and searched Google, but I can't find anything. The UIImageView in iOS programming can have an image set to it, but you can also set a highlighted image to it. What exactly is this highlighted image?
you can set two different images to an UIImageView, one to its image property, another to its highlightedImage property.
There are many cases where you want to change the state of the image (eg: a checkmark) from off to on or vice versa. in that case, instead of you setting the UIImageView's image to the appropriate one everytime, you can just say
theCheckMarkImageView.image = regularImage;//set the regular image
theCheckMarkImageView.highLightedImage = highlightedImage;
(based on your logic show it highlighted or not).
theCheckMarkImageView.highlighted = YES/NO;
In addition to all this, do check Ethan Huang's answer about how tabelviewcell works with this property. Quite useful if you are showing different images based on cell selection.
highlightedImage use for highlight ImageView,simple.
imageView.highlightedImage = [UIImage imageNamed:#"hightlighted.png"];
imageView.highlighted = YES;
Don't need to waste time to search or read a lot. Objective-C is meaningful language. Just drag ImageView and make a try code, step by step test all property, method in UIImageView.h(in UIKit framework) and you'll understand.
Do the same with other UI element.
Besides Nitin Alabur's answer, a useful tip here:
UITableViewCell or UICollectionViewCell has a .selected property. If you put an UIImageView in a cell, then, when you select the cell, the imageView will use the .highlightedImage instead of .image.
Thus you can make cell selection visual state easily.
The highlighted image is for when you have a control that has a UIImageView that can be pressed. While the user is pressing the control, the highlighted image is shown. When the control is not being pressed, the normal image is shown.
All commenters have been wrong or answered the wrong question or been too wordy. Here's the simple and correct answer:
The highlighted image state is when the user's finger is touching the imageview.
Related
I have problem when in iOS settings is enabled this setting "Button Shapes"
It causing this underline in application (first picture with enabled setting, second without)
Any idea how to programatically or in storyboard disable it?
I tried attributed text but I get same result :(
I'm newbie in Swift.
Thanks for help!
It's not a problem. You should not make any attempt to counter any accessibility changes set by the user. They are there for a reason.
This is an answer by user4291543 from this question Remove underline on UIButton in iOS 7
[yourBtnHere setBackgroundImage:[[UIImage alloc] init] forState:UIControlStateNormal];
I found this answer works with SWFrameButton
And for all the others saying "Don't Do This", SWFrameButton is a very good example of when you would want to do this. I also think the OP's situation is a perfectly valid scenario as well...
I totally agree with #maddy's comment:
It's not a problem. You should not make any attempt to counter any accessibility changes set by the user. They are there for a reason.
But I did stumble on a way to accomplish the task at hand...
In addition to a UIButton, you'll also need to make a .png file that contains nothing (meaning the entire contents have an opacity of 0%). Go ahead and load that into your xcode project's assets.
Now go ahead and set the Button's Background to that image you just provided. (In my case, I called it clear) This will remove the underline from the button's text. However, now you can't see the boundaries of the button. This can be solved by changing the Background of the button's View. Go ahead and select any color for the View's Background property and now the background of the View visibly defines the button's boundaries. You're able to see this because your clear.png has an opacity of 0%.
see the Attributes inspector for UIButton here.
Rather than trying to defeat the underline by going to make a label perform some action via UITapGestureRecognizer, this allows you to still use a UIButton. Keeping inline with accessibility features to mark buttons for people that want to do that.
You could create a custom button class with a label (with clear color). If you set the text of this label instead it shouldn`t get an underline.
Are you sure you want to do that?
Apple added an accessibility feature to mark buttons for people that want to do that. Apple will probably reject your app because it defeats a system function meant to help the disabled.
I found the solution. All you have to do is set a picture as the background of the button. just pick a picture with the same color as the button you created.
I want to create a set of buttons that will look like this:
(The selected buttons are those with a different background)
Any ideas for a simple implementation?
Are there any known open source implementations for this?
Thanks!
Following is the library which may be use to solve your problem,
For different appearance you need to give the conditional code for that but with out that your problem may solve with this library or code.
You can download the sample code of RRTagController project here.
For rounded corners use UIButton.layer.cornerRadius. if you set corner radius to half of the box you will get circle. For the border color use layer.borderColor = UIColor.redColor().CGColor.
For the background color of the button you can keep track with selected state of the button. Here is an example of using selected state: UIButton state selected
Next thing you could do is to keep data about selected ones, since the best way to do something like this would be UITableView - seems like every row of buttons have same height, and if you want to send that somewhere you can keep track about what items are selected.
I think the best way is to use UICollectionView.
I want to have a UIButton that has an image as the button itself, to have a nice highlight when pressed but not on the entire rectangle but on the object in the image (quite similar to what Twitter is doing on the status bar buttons)
I thought that making an image with the background as transparent will solve the problem, the thing is that on one it works, and on one it doesn't and they are exactly the same property wise.
So my general question:
What are the steps I need to do in order to get this done?
I am experimenting a little bit witch apps programming.
How I can add a UIImage to a UITextField"?
Like Whats App or the most other Chat Apps.
I have search some time but doesn't find a solution, also i have tried to search in side of XCode with the auto complete but I have not found a function. So I hope you can help me.
The easiest way to add an image to a text field is to have a UIView that contains both UITextField and a UIImageView as subviews.
Next up, you can have a UIButton with both an image and text, and just set userInteractionEnabled to "NO" and it'll behave like a text view with an image next to it.
Now to get more complicated, if you want a chat-like text field that allows text (that you can type into) and images next to each other, you need to start thinking about custom subclasses. Other people have asked and have gotten answers for this same approach.
Now I know this question may sound like a duplicate, but I doubt it seeing as I've researched and none of the possible duplicates answer my question. If it is a duplicate and it's been answered by all means show me the way!
But my question doesn't deal so much with a button changing an image, more so the button is the image.
So my button is an image and when pressed a sound plays and then the image changes until the sound is done. My problem is I can't get the image to change.
Now I have tried this method thinking that I could press my button and my new image would cover up my button until the sound was done:
UIImage *dolDerp = [UIImage imageNamed:#"dolphin2.png"];
[imageview setImage:dolDerp];
I have an outlet set up and it's connected to an image view object and then the action is connected to the button, so in theory when the button is pressed the new image should take over the screen. Now obviously the code needs to be tweaked so the button would go away after a few seconds when the sound is played, but my problem is I can't even get the button to display. I also would prefer to just have the button objects image change if possible?
If anyone could offer some help it's much appreciated!
the best thing is in Interface Builder assign the two images to the button Normal/Selected states.
in code just use this line:
myButton.selected = YES;
//or
myButton.selected = NO;
What #Mahmoud Fayez suggested is good. In code, the proper way to set a buttons image/background image is [button setImage:image forState:UIControlStateNormal] or the similar method for setBackgroundImage
If you are using IB though, it is indeed best to set the different images for different states in IB, then change the buttons state (which will then change the buttons image) in code.