I'm fairly new to iPhone programming and am trying to implement a double-component PickerView. At this point the picker works fine in terms of taking user input, created with Interface Builder. However, I need to change the font size to accommodate the text length in each column. I very much would appreciate any link to a straightforward method to creating a multi-component picker with an adjustable font size. Seems like it is not possible if Interface Builder is used to create the picker. So far I have not found any code links that address this issue in detail.
Thanks in advance.
You need to implement the delegate method...
pickerView:viewForRow:forComponent:reusingView:
... and then alter the font of the UI element inside the provided view. I think the default is a UILabel. Alternatively, you can provide your own custom view.
Related
When I try to place objects using the Interface Builder in Xcode into a NSScrollView, they appear fine until runtime in the application, where they do not appear at all for some reason. I want it to be so that I can place multiple buttons and labels in the view, and have the user be able to scroll down to see more.
Am I not meant to use NSScrollView for this purpose?
Is there another way to go about implementing it I am not aware of?
You need to check the where you added the UI objects.
You need to consider these :
Is your autolayout enabled?
Did you flipped the view?
Resizing mask is working good as per your requirement.
Am I not meant to use NSScrollView for this purpose?
No, you picked the correct control for the requirement. NSScrollView is indeed for same kind of use.
My app has all different kind of NSViews, including NSTabView, NSButton, NSTextField, NSPopupButton and so on.
I would like to change all display text to a certain font and with certain font style.
is there anyway to set the default font and font style in cocoa app?
I have tried:
How to loop through subviews in order to get the text of NSTextViews
however it doesn't work with NSTabView and NSButton.
I think that there must be an easy to do so, it's just I don't know what it is.
Please advise.
There isn't a built in way to do this (ie. by setting a key in Info.plist). You really do need to go through all the controls in your app, one way or another, and set a custom font for them. There are a few possible approaches. One is to use a custom subclass for all the controls for which you need to use a custom font. The subclass can be really minimal, it just needs to set the correct font upon initialization, possibly preserving other font attributes (size, color, etc.) setup in Interface Builder. Another option is to do as you've suggested and go through each subview in your app, check to see if it responds to -setFont:, and set your custom font if it does. I've used the first approach (subclass) with good success.
The question may be similar with
Designing inside a scrollview in xcode 4.2 with storyboards
but none of the answer there makes sense at all.
Okay I created a new controller and I added a scrollView.
The very first thing I noticed is there is NOWHERE to specify the content size of the scrollView.
Not in attributes inspector, not in size inspector.
Then what?
I am expecting some larger than normal box where I can draw all the view I want to put in. There is no such thing either.
I am very frustated.
All the "tutorial" out there tell about how to fill scrollView using code.
Another thing I tried is to select controller go to size inspector and then choose FREEFORM.
Great. I still can't make that template big.
Should I do this in XIB instead? At least on that one I can have one huge UIView. Or what is the official way industry standard way of doing this? Is there a WWDC for this one?
Say I want to draw something like these:
I don't think you can get a tutorial on this as it is simply impossible in IB. As most people already commented out what you want to do here need to be done programmatically.
If you are using XIB you can set up all your content there. Under the size tab (in the inspector) you will need to change the height to fill all your content but you still need to set up your contentSize programmatically.
For storyboard I don't think it is possible to change the size of your scrollview in IB.
In the app I am currently developing, I have to implement a screen which allows the user to ask a question. This screen contains a UIImageView next to the UITextView, taking up a portion of the space. It looks like the below image.
My question is, how can I wrap the UITextView text around the UIImageView, so that the text won't be in a block, but flowing around the UIImageView?
Thanks in advanced.
I don't think you can do this, unless your UITextView was a rich text or HTML editor, with the image embedded inside it. Basically what you're asking for is a non-rectangular UITextView. To the best of my knowledge, that is impossible in iOS, unless you were to create something brand new from scratch, which would be extremely complex. I have seen plenty of UILabel-style controls that can display HTML-like text, but not edit it.
EDIT: this might help: http://www.cocoanetics.com/2011/01/rich-text-editing-on-ios/
Unfortunately that's not a trivial issue as the UITextField does not provide any functionality that would be useful here.
However what you could do is to implement your own text view using UITextInput (for text input) and Core Text (for text display) and then define the drawing rectangle for Core Text (you can read more on Core Text here) from a custom CGPath that would exclude the images frame.
It does sound a bit complex (insane, perhaps), however as (nearly always) there are open source solutions that already found a solution. The OmniGroup framework contains custom text input controls based on Core Text and UITextInput. They're licensed under MIT License (well, moreless) so you should be just fine.
Can anyone point me in the right direction here.
Im trying to use a UIPickerView that is displaying images.
The images are too big for the default pickerview setup so I was wondering how I could control how big the rows in the UIPickerView are and how wide the translucent selection bar is to accomodate for their custom size.
Can anyone provide some guidelines as to how big I should make the row images or where a good tutorial / book chapter is on this?
Thanks!
Why not use the UIImagePickerController instead of trying to customize a UIPickerView? It is designed to enable you to allow the user to pick from their library of images if you use the sourceType of UIImagePickerControllerSourceTypePhotoLibrary.
There is sample code on how to use this controller at http://zcentric.com/2008/08/28/using-a-uiimagepickercontroller/
If the images are not from the user's library, then I would suggest you scale the images down to fit the constraints of the UIPickerView, or use a tabelView with the images laid out in it for the user to select.