I'm playing with core-plot and I'd like to set font family and size for axis title, so what I did is:
CPTextStyle *axisTitleTextStyle = [CPTextStyle textStyle];
axisTitleTextStyle.fontName = #"Helvetica Bold";
axisTitleTextStyle.fontSize = 14.0;
but when I compile I get the error:
error: object cannot be set - either readonly property or no setter found
How can I set font?
Thanks,
Max
CPTextStyle changed a while back. It is now immutable. There is a mutable variant called CPMutableTextStyle.
give this a try
CPTextStyle *axisTitleTextStyle = [[CPTextStyle alloc] init];
axisTitleTextStyle.fontName = #"Helvetica Bold";
axisTitleTextStyle.fontSize = 14.0;
self.graph.titleTextStyle = axisTitleTextStyle;
[axisTitleTextStyle release];
Related
I am new to this. And there comes my first problem.
I build an object loader with SceneKit. I got the path, the Object is available, but I have no clue how I can color the shown object.
ScnScene *testScene = [SCNScene sceneWithURL:url options:nil error:NULL];
testScene.background.contents = [UIImage imageWithName:#"color.png"];
[self.mainView.scene.rootnode addChildNode:testScene.rootNode];
This didn't work. I also tried with:
SCNMaterialProperty *testColor = [SCNMaterialProperty materialPropertyWithContents [UIImage imageNamed:#"color.png"]];
testScene.rootnode.geometry.materials = testcolor;
Or:
SCNMaterial *testColor = [SCNMaterial material];
testColor.diffuse.contesnts = [UIColor redColor];
testScene.rootnode.geometry.firstMaterial = testColor;
Nothing works. When I start the app, every object is displayed. So far the OBJ-Loader works out very well. But everything is still gray. I totally have no clue how to color the displayed objects. Has anyone a hint/idea/solution for me?
Btw. I want to avoid that I have to build a geometry out of the OBJ-Informations manually. So I try to solve this by the SCNScene.
The major problem was that the import by a SCNScenedoes not work that way. So the right solution is to import the obj.file into a SCNNode, add a SCNMaterial with the chosen color (or an image) to the SCNNode and give the SCNNodeto the SCNScene. To load the obj.file, you need to import that by Model IO Framework.
I will give some code how I made it colorful.
#import <SceneKit/SceneKit.h>
#import <ModelIO/ModelIO.h>
#import <SceneKit/ModelIO.h>
...
#property (nonatomic) SCNView* mainView;
....
MDLAsset *asset = [[MDLAsset alloc] initWithURL:url];
SCNScene *scene = [SCNScene scene];
SCNNode *node = [SCNNode nodeWithMDLObject:[asset objectAtIndex:0]];
SCNMaterial *material = [SCNMaterial material];
material.diffuse.contents = [UIColor colorWithHue:0 saturation:0.1 brightness:0.5 alpha:1];
node.geometry.firstMaterial = material;
[scene.rootNode addChildNode:node];
[self.mainView.scene.rootNode addChildNode:scene.rootNode];
Alternately you can add a color by this:
material.diffuse.contents = [UIImage imageNamed:#"farbe.png"];
Now you can import any obj.file externally (from any chosen folder you like) and color it.
Thanks to SGlindemann, cashmash and Hal Mueller, who helped out to find that solution.
UPDATE (29.1.2017)
Somehow the way above does not work anymore. I did not figure out yet what changed. But I made another code that makes loading for 3D files possible (from mainBundle, not externally). Here I start from a SCNNode class which is called by the ViewController.m. The SCNScene is setup in the ViewController. Following there is the code which I wrote for the SCNNode class.
Before you start, put the .obj and .mtl file (both with same name) into your Xcode project. You don't need to convert it to a scene.
#import <ModelIO/ModelIO.h>
#import <SceneKit/ModelIO.h>
...
#property (nonatomic) SCNNode *objectNode;
...
NSString* path = [[NSBundle mainBundle]
pathForResource:[NSString stringWithFormat:#"name of the obj.file"]
ofType:#"obj"];
NSURL *url = [NSURL fileURLWithPath:path];
MDLAsset *asset = [[MDLAsset alloc]initWithURL:url];
// Create the Block
self.objectNode = [SCNNode nodeWithMDLObject:[asset objectAtIndex:0]];
[self addChildNode: self.objectNode];
return self;
This returned self has to be added into your view.
[self.view.scene.rootNode addChildNode:returnedObj];
The MDLAssetloads the .obj-file with the corresponding .mtl-file and png-File. I used this code to load objects from MagicaVoxel (this exports obj+mtl+png at once). I did not get deep into it yet.
I did NOT try this code with external loadings or typing in colors manually via SCNMaterial. So there is no statement whether this works or not. I did not try.
Your first example will set the background of the scene but do nothing with your object.
Your second example should be giving you some compiler warnings. You're assigning a single SCNMaterialProperty to testScene.rootnode.geometry.materials, which expects an array of SCNMaterial (not SCNMaterialProperty). Is that your real code?
The final example shouldn't compile at all: you've misspelled contents as contesnts. Other than that, it ought to work.
Note that MDLAsset can import an OBJ file and return an SCNNode. See How do you convert Wavefront OBJ file to an SCNNode with Model I/O. If the object is an asset you'll be shipping with your project, save it as an SCNScene (which is compact and optimized), and ship that, not the original OBJ.
How can scroll performance of a UITextView be improved when using attributed strings? The following sample code results in completely unacceptable performance on an iPad 3.
NSMutableParagraphStyle *pStyle = [[NSMutableParagraphStyle alloc] init];
pStyle.lineSpacing = 14.0;
pStyle.lineHeightMultiple = 20;
pStyle.maximumLineHeight = 20.0;
pStyle.minimumLineHeight = 20.0;
UIFont *font = [UIFont systemFontOfSize:20.0];
NSDictionary *attributes = #{ NSFontAttributeName : font, NSParagraphStyleAttributeName : pStyle};
NSMutableAttributedString *newline = [[NSMutableAttributedString alloc] initWithString:#"\n\n"];
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:#"" attributes:#{}];
for (int paragraph=0; paragraph<300; paragraph++){
for (int word=0; word<100; word++){
[string appendAttributedString:[[NSAttributedString alloc] initWithString:#"text!"]];
}
[string appendAttributedString:newline];
}
[string setAttributes:attributes range:NSMakeRange(0, string.length)];
self.textView.attributedText = string;
I should mention that I am open to using Text Kit, but I wouldn't know where to start to ensure that performance is ultimately ok. Also, here's what's going on in the profiler while scrolling.
Two things help here.
First, I only needed the lineSpacing style set. Setting any of the other paragraph parameters results in slow scrolling.
The second was to call [self.textView.layoutManager ensureLayoutForCharacterRange:NSMakeRange(0, self.textView.attributedText.length)]; in viewDidAppear:. Otherwise the first time you scroll through the document it is jerky.
I have recently coded in a menu item, the "Game Over" Label appears but the menu item "Restart" isn't. I have no idea why?
Can anyone help, here is whats in my method !
CGSize winSize = [[CCDirector sharedDirector] winSize];
CCLabelTTF *label = [CCLabelTTF labelWithString:#"Game Over"
fontName:#"Marker Felt"
fontSize:64];
label.color = ccRED;
label.position = ccp(winSize.width*0.5, winSize.height*0.75);
[self addChild:label];
CCMenuItem *item = [CCMenuItemFont itemWithString:#"Restart"
target:self
selector:#selector(restartGame)];
CCMenu *menu = [CCMenu menuWithItems:item, nil];
[menu alignItemsVertically];
[self addChild:menu];
try this code:
menu.position = ccp(winSize.width/2, winSize.height/2);
set the specific position.
I have a very very long text, so instead of using UITextView, I want to truncate the text to small chunks that can fit to a label with width and height 300, 400, and based on number of chunks, I want to create UILabel dynamically and populate them with these chunks.
I have written a method but it seems doesn't return the actual strings that can fit. it returns shorter strings.
am I missing something?
is there anyway I can do this?
- (NSArray *)truncate:(NSString *)text
{
NSMutableArray *textChunks = [[NSMutableArray alloc] init];
NSString *chunk = [[NSString alloc] init];
CTFramesetterRef frameSetter;
UIFont *uiFont = [UIFont systemFontOfSize:17.0f];
CTFontRef ctFont = CTFontCreateWithName((__bridge CFStringRef)uiFont.fontName, uiFont.pointSize, NULL);
NSDictionary *attr = [NSDictionary dictionaryWithObject:(__bridge id)ctFont forKey:(id)kCTFontAttributeName];
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:text attributes:attr];
CFRange fitRange;
while (attrString.length>0) {
frameSetter = CTFramesetterCreateWithAttributedString ((__bridge CFAttributedStringRef) attrString);
CGSize framSize = CTFramesetterSuggestFrameSizeWithConstraints(frameSetter, CFRangeMake(0,0), NULL, CGSizeMake(myLabel.frame.size.width, myLabel.frame.size.height), &fitRange);
NSLog(#"height: %f", framSize.height);
CFRelease(frameSetter);
chunk = [[attrString attributedSubstringFromRange:NSMakeRange(0, fitRange.length)] string];
[textChunks addObject:chunk];
[attrString setAttributedString: [attrString attributedSubstringFromRange:NSMakeRange(fitRange.length, attrString.string.length-fitRange.length)]];
}
return textChunks;
}
Yes, you need to add a paragraph style in order to get the width/height measure to work properly. See giving-framesetter-the-correct-line-spacing-adjustment. Note how CTFontGetLeading() is used to get the font leading and then this property is set vai CFAttributedStringSetAttributes().
Well, Ive searched in several places and although some people allegedly have found fixes it doesn't seem to apply to my case.
I'm trying to procedurally set the line height of a few UItextviews like this :
UITextView *lab = [LocalTexts objectAtIndex:j];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineHeightMultiple = 50.0f;
paragraphStyle.maximumLineHeight = 50.0f;
paragraphStyle.minimumLineHeight = 50.0f;
NSString *string = lab.text;
NSDictionary *ats = #{
NSFontAttributeName : [UIFont fontWithName:#"DIN Medium" size:16.0f],
NSParagraphStyleAttributeName : paragraphStyle,
};
lab.attributedText = [[NSAttributedString alloc] initWithString:string attributes:ats];
Strange thing is that if I disable the NSFontAttributeName assignment, the line height will work, also, if I set the Paragraph style to have a certain paragraph height, that always works too, so the NSParagraphStyleAttribute IS NOT being fully ignored. I dont know if it is a bug or I'm actually doing something wrong.
I tried implementing it as pure CORE TEXT, but it is a bit too complex for the current scope of the project.
Hope someone can point me in the right direction. Thanks.
This is a known bug in NSHTMLWriter which is used by UITextView to convert your attributed string to HTML: http://www.cocoanetics.com/2012/12/radar-uitextview-ignores-minimummaximum-line-height-in-attributed-string/
You can use UITextView replacement we have in DTCoreText to render this text correctly: https://github.com/Cocoanetics/DTCoreText