I made a CALayer *sublayer over the main view, then I added CATextLayer over sublayer.
Now I want to show text on the CATextLayer by clicking a button on my main view.
How can I do this?
Set the buttons action using -[UIButton addTarget:selector:forControlEvents:]:, then in that function set the CATextLayers string property to either an NSString or an NSAttributedString.
I remind you that CATextLayer doesn't respect paragraph settings on attributed strings, so line height is kind of off and does not look so great.
Related
I have a nstextview, and I was wondering how to set the background color of it. I've tried quite a few things, but none seem to work. They just set the actually text color. I have a NSColorWell, called colorBox, and the textview is called doc, in case someone wants to know. I use `[self.colorBox color] to get the color in the NSColorWell
NSTextView has backgroundColor property. Try setting it to something else like NSColor.redColor().
It also has drawsBackground property which need to be set to true to make it work.
let textView1 = NSTextView()
textView1.backgroundColor = NSColor.redColor()
textView1.drawsBackground = true
To change the background color of the attributed string you must add the attribute to it:
[mutableAttributedString addAttribute:NSBackgroundColorAttributeName value:[UIColor redColor] range:selectedRange];
If you're using storyboards, TextViews have three sections in the Attributes Inspector, "Text View", "Scroll View", and "View". "Background color" is the fifth option in the "View" section.
I have made a subclass for UITableViewCell and I am implementing Subtitle TableViewCell with a thumbnail image.
Following are the UITableViewCell contents:
The issue I am facing is when the data loads in TableViewCell, the subtitleLabel text gets hidden upto the height of the imageView. But when I select any Cell, it shows subtitleLabelText completely.
I have added the screenshot of the same for complete reference:
The UIImageView has frame = CGRectMake(0,0,40,40);
Try to give a clearColor background color for the cell title label -
cell.textLabel.backgroundColor = [UIColor clearColor];
It turns out I was using TableViewCell style as subtitle instead of custom. The style settings in subtitle was making the other labels to hide below them. What a silly miss!
In your nib or storyboard file, make sure that the label is below the image view in the list of subview components (it is in the left of the screen). The first subview in that list will be at the lowest level (behind every other subview, if they overlap).
write one line of code
Titlelabel.backgroundcolor = [UIColor ClearColor];
because your label has white background..and Titlelabel height is too large so label is colliding.
Let me know working or not!!!
Happy Coding!!!
What is the frame of Title Label? if its height is more, then also it may possible that it hides your subtitle Label
Here's a great tutorial which helped me when I was trying to do something like you want :
http://www.appcoda.com/ios-programming-customize-uitableview-storyboard/
You can adapt the size of the different components (ImageView, TitleLabel, Subtitle,...)
I have a string coming from server which I am displaying on UILabel multiligne. It is within that string, I am identifying some particular substring. I want to place a button on that substring(button will be a subview of UILabel). For this I require substring coordinates. I went through this but I am not able to understand it. Suppose my complete string is abc, 567-324-6554, New York. I want 567-324-6554 to be displayed on button for which I need its coordinates.
How can I use above link to find coordinates of substring?
Thanks,
UILabel doesn't have any methods for doing this. You can do it with UITextView, because it implements the UITextInput protocol. You will want to set the text view's editable property to NO.
Something like this untested code should work:
- (CGRect)rectInTextView:(UITextView *)textView stringRange:(CFRange)stringRange {
UITextPosition *begin = [textView positionFromPosition:textView.beginningOfDocument offset:stringRange.location];
UITextPosition *end = [textView positionFromPosition:begin offset:stringRange.length];
UITextRange *textRange = [textView textRangeFromPosition:begin toPosition:end];
return [textView firstRectForRange:textRange];
}
That should return a CGRect (in the text view's coordinate system) that covers the substring specified by stringRange. You can set the button's frame to this rectangle, if you make the button a subview of the text view.
If the substring spans multiple lines, the rectangle will only cover the first line.
I have a view that contains a button and a textview. When the button is clicked, the textview's hidden status will change and be shown on the view. Springs and struts have been configured so the textview expands vertically with the view. All this is done in IB
I then insert text into the textview programmatically, but I need the textview to show all its contents without the user needing to scroll.
This is the code I use to calculate the height of the text in the textview:
- (float) getTextViewHeight {
//based on http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TextLayout/Tasks/StringHeight.html%23//apple_ref/doc/uid/20001809-CJBGBIBB
[textview.textContainer setLineFragmentPadding:0.0];
[textview.layoutManager glyphRangeForTextContainer:textview.textContainer];
return [textview.layoutManager usedRectForTextContainer:self.interactionData.textContainer].size.height;
}
With or without that call to -sizeToFit on the textview, it will either be too big or too small (depending on its contents).
I need to get the height of the textview with all the contents showing so I can adjust the view's size.
I know I could probably use a NSTextField as a label, but I need a NSTextView for its added functionality (specifically using the enclosing scrollview's rulerview).
Does anybody have any suggestions?
NSTextView generally will resize itself if its string over-runs the container width. I think this is because the contained cell has a default behavior for text over-run, called "Line Wrap" or something. My gut feeling is you could just ask the TextView for it's height after it's been loaded and adjust the containing view accordingly, all without needing a layout manager. And obviously make sure the auto-resizing mask is set (oh, you're doing this in IB so no worries there). I could be wrong, and I didn't do any tests... but yeah, you could try it! :P
Her's how I do it and it works well:
// Help text.
NSBundle* mainBundle = [NSBundle mainBundle];
NSString* path = [mainBundle pathForResource: #"category-analysis-help" ofType: #"rtf"];
NSAttributedString* text = [[NSAttributedString alloc] initWithPath: path documentAttributes: NULL];
[helpText setAttributedStringValue: text];
NSRect bounds = [text boundingRectWithSize: NSMakeSize(helpText.bounds.size.width, 0) options: NSStringDrawingUsesLineFragmentOrigin];
helpContentView.frame = NSMakeRect(0, 0, helpText.bounds.size.width + 20, bounds.size.height + 20);
helpContentView is just a container for helpText to add some marging around the text. helpText resizes with its container.
It should be obvious that for the correct height a fixed width is necessary, since the height depends on what fits on the lines.
If you want to omit the scroll view entirely (e.g., make a text view that is attached to another superview and sizes itself to fit its text), you might take a look at NSText. It is, AFAICT, basically a NSTextView without the superview (scroll view parts), and can automagically resize itself.
How would I give a NSTextView some padding/a margin to the left?
I know how you do it in a NSTextField (by subclassing NSTextFieldCell) but how do you do it in a NSTextView?
EDIT: A bit more info:
1. The Text View just has plain text no rich text and no other fancy stuff like a proper text editor (e.g Paragraph insets).
2. Is it possible to use setTextContainerInset: for this?
You could try subclassing NSTextView and override the textContainerOrigin.
Details here.
For example this subclass will give a top and bottom margin of 5 left of 20 and right of 10.
#implementation MyTextView
- (void)awakeFromNib {
[super setTextContainerInset:NSMakeSize(15.0f, 5.0f)];
}
- (NSPoint)textContainerOrigin {
NSPoint origin = [super textContainerOrigin];
NSPoint newOrigin = NSMakePoint(origin.x + 5.0f, origin.y);
return newOrigin;
}
#end
Just to add an update to this. iOS7 adds a property to UITextView called textContainerInset. Calling setTextContainerInset will create margins inside the TextView for the content.
The way TextEdit does it (when in Wrap to Page mode) is to put the text view inside of a larger view, and set that larger view as the document view of the scroll view. That's more work to set up, but won't leak presentation information (in the form of a specially-customized paragraph style) into the model (the text).
Create a mutable paragraph style (most probably by making a mutable copy of the default paragraph style, then set its head indent and first-line head indent to the left margin you want. Then, set this paragraph style as the value of the NSParagraphStyleAttributeName attribute for the entire contents of the view's text storage.
Note that this will show up in RTF and possibly HTML data obtained from/given to you by the view. If the view is not read-only (i.e., the user can edit the text and you will retrieve or receive that text from the view), then you should probably avoid this solution. If the user can show the ruler and edit the paragraph style themselves, then you should definitely avoid this solution.
This is all it takes when using a NSTextView with plain text style :
textView.textContainerInset = NSSize(width: 15, height: 5)