hi I need to change text to bold in message composer body pls help me , I've tried with attributed text but I couldn't add
NSMutableAttributedString *yourAttributedString = [[NSMutableAttributedString alloc] initWithString:message];
NSString *boldString = #"hey";
NSRange boldRange = [message rangeOfString:boldString];
[yourAttributedString addAttribute: NSFontAttributeName value:[UIFont boldSystemFontOfSize:18] range:boldRange];
UILabel *lbl = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 0, 0)];
lbl.attributedText = yourAttributedString;
MFMessageComposeViewController *messageComposeVC = [[MFMessageComposeViewController alloc] init];
messageComposeVC.messageComposeDelegate = self;
messageComposeVC.recipients = selectedContacts;
messageComposeVC.body = [lbl.attributedText string];
[self presentViewController:messageComposeVC animated:YES completion:nil];
I think it is better if you initiate a attribute to hold all your text attributes ( text size, font , colors ,weight ,styles) and add that when you are initializing the text , in your case "yourAttributedString" . Not sure if there is a specific reason to as why you do this so but try the following .
Use LocalizedStandardRangeofString instead or RangeOfString as you are
displaying this text.Check the "important" section in this documentation https://developer.apple.com/documentation/foundation/nsstring/1416849-rangeofstring?language=objc
//make an attributes dictionary here.
NSDictionary *stringAttributes = #{
NSFontAttributeName:[UIFont boldSystemFontOfSize:20]
};
NSString *message = #" message hey";
NSMutableAttributedString *yourAttributedString =[[NSMutableAttributedString alloc]initWithString:message];
NSString *boldString = #"hey";
NSRange range = [message localizedStandardRangeOfString:boldString];
[yourAttributedString addAttributes:stringAttributes range:range];
self.lbl.attributedText = yourAttributedString;
Related
I'm trying to produce a set of custom page numbers. The current page number will be displayed. The others will simply be open circles.
Using the code below, I'm getting the desired results - except, with the new text attributes in iOS7, I cannot figure out how to center the number.
Any help will be appreciated.
Original iOS6 code:
[pageNumber drawInRect:CGRectMake(x,(self.frame.size.height-_currentPageDiameter)/2-1,_currentPageDiameter,_currentPageDiameter) withFont:[UIFont systemFontOfSize:_currentPageDiameter-2] lineBreakMode:UILineBreakModeCharacterWrap alignment:NSTextAlignmentCenter];
My iOS7 code:
NSString *pageNumber = [NSString stringWithFormat:#"%i", i+1];
CGContextSetFillColorWithColor(myContext, [[UIColor whiteColor] CGColor]);
UIFont* font = [UIFont systemFontOfSize:_currentPageDiameter-2];
NSDictionary *attrs = #{ NSForegroundColorAttributeName : [UIColor whiteColor],
NSFontAttributeName : font,
NSTextEffectAttributeName : NSTextEffectLetterpressStyle};
CGRect r = CGRectMake(x,(self.frame.size.height-_currentPageDiameter)/2-1,_currentPageDiameter,_currentPageDiameter);
[pageNumber drawInRect:r withAttributes:attrs];
The property you're missing for center alignment is defined the following way. I also added the line break mode you had defined on the iOS6 code:
NSMutableParagraphStyle *paragrapStyle = [[NSMutableParagraphStyle alloc] init];
paragrapStyle.alignment = NSTextAlignmentCenter;
paragrapStyle.lineBreakMode = NSLineBreakByCharWrapping;
You just place them in the attributes dictionary under the key:
NSArray *attrs = #{
NSParagraphStyleAttributeName : paragraphStyle,
...
};
I have a TextKit based editor with support to adding images. I want to show each image on separate lines.
My code looks like this (Thank you TextEdit), in my subclass of NSTextStorage
- (void)addImageAssets:(NSArray *)allAssets atRange:(NSRange)range;
{
NSMutableAttributedString *attachments = [NSMutableAttributedString new];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.alignment = NSTextAlignmentCenter;
paragraphStyle.lineSpacing = 20.0f;
for (ALAsset *newAsset in allAssets)
{
UIImage *theImage = [UIImage imageWithCGImage:newAsset.aspectRatioThumbnail];
NSTextAttachment *textAttachment = [NSTextAttachment new];
textAttachment.image = theImage;
NSMutableAttributedString *replacementString = [NSMutableAttributedString new];
[replacementString appendAttributedString:[NSAttributedString attributedStringWithAttachment:textAttachment]];
[replacementString addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle
range:NSMakeRange(0, [replacementString length])];
[attachments appendAttributedString:replacementString];
}
_isEditing = YES;
[self beginEditing];
[_backingStore replaceCharactersInRange:range
withAttributedString:attachments];
[self edited:NSTextStorageEditedAttributes
range:range changeInLength:allAssets.count];
[super processEditing];
[self endEditing];
_isEditing = NO;
}
(the _isEditing is a boolean flag used for book-keeping)
The output looks like this Output http://take.ms/QCvRK
I have tried various parameters on the NSMutableParagraphStyle but I couldn't get a line break after each image.
Appending a line break ("\r") around the text attachment will result in a glyph error
!!! _NSLayoutTreeLineFragmentRectForGlyphAtIndex invalid glyph index 1
!!! _NSGlyphTreeInvalidateGlyphsForCharacterRange invalid char range 1
!!! _NSGlyphTreeInvalidateGlyphsForCharacterRange character count mismatch
!!! _NSLayoutTreeLineFragmentRectForGlyphAtIndex invalid glyph index 0
!!! _NSLayoutTreeLineFragmentRectForGlyphAtIndex invalid glyph index 0
!!! _NSLayoutTreeLineFragmentUsedRectForGlyphAtIndex invalid glyph index 2147483647
I tried to subclass the NSTextAttachment to over-ride the attachmentBoundsForTextContainer:proposedLineFragment:glyphPosition:characterIndex: so that the width is set to the device width, this resulted in the attached image looking blown up.
Any suggestion on how I can introduce a line break right after each image ? Also it would be great if I can get the text to flow around the image attachments.
Thanks in advance.
I can’t figure out how to set the font/styling of my NSMenuItems in my NSMenu. I tried the setFont method on the NSMenu but it doesn’t seem to have any effect on the menu items. NSMenuItem doesn’t seem to have a setFont method. I would like for them all to have the same font/style so I would hope there’s just one property I can set somewhere.
They can have an attributed title, so you can set an attributed string as title with all it's attributed, font included:
NSMutableAttributedString* str =[[NSMutableAttributedString alloc]initWithString: #"Title"];
[str setAttributes: #{ NSFontAttributeName : [NSFont fontWithName: #"myFont" size: 12.0] } range: NSMakeRange(0, [str length])];
[label setAttributedString: str];
NSMenuItem has support for attributed strings as titles:
- (void)setAttributedTitle:(NSAttributedString *)string;
Example code:
NSMenuItem *menuItem = [[NSMenuItem alloc] initWithTitle:#"Hi, how are you?" action:nil keyEquivalent:#""];
NSDictionary *attributes = #{
NSFontAttributeName: [NSFont fontWithName:#"Comic Sans MS" size:19.0],
NSForegroundColorAttributeName: [NSColor greenColor]
};
NSAttributedString *attributedTitle = [[NSAttributedString alloc] initWithString:[menuItem title] attributes:attributes];
[menuItem setAttributedTitle:attributedTitle];
Documentation: https://developer.apple.com/library/mac/#documentation/cocoa/reference/applicationkit/classes/nsmenuitem_class/reference/reference.html
+ menuBarFontOfSize: from NSFont is your friend here.
If you don't plan to change the font family, you should use [NSFont menuBarFontOfSize:12] to get the default font and set a new size.
If you are only changing the color, you still need to set the default font size back by doing [NSFont menuBarFontOfSize:0].
So to only change the NSMenuItem color:
NSDictionary *attributes = #{
NSFontAttributeName: [NSFont menuBarFontOfSize:0],
NSForegroundColorAttributeName: [NSColor greenColor]
};
NSAttributedString *attributedTitle = [[NSAttributedString alloc] initWithString:[menuItem title] attributes:attributes];
[menuItem setAttributedTitle:attributedTitle];
Actually [NSMenu setFont:] works for all menu items submenus (if last ones doesn't have their own font). Maybe you set attributed title before setting the menu font?
Realized it, after writing own procedure to iterate through menu items.
In case you need some custom processing (i.e. change font for not all items, or customize it for different items) here is a simple iterating code:
#implementation NSMenu (MenuAdditions)
- (void) changeMenuFont:(NSFont*)aFont
{
for (NSMenuItem* anItem in self.itemArray)
{
NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObject:aFont forKey:NSFontAttributeName];
anItem.attributedTitle = [[[NSAttributedString alloc] initWithString:anItem.title attributes:attrsDictionary] autorelease];
if (anItem.submenu)
[anItem.submenu changeMenuFont:aFont];
}
}
#end
I've been working a product display app but it has a memory leak that causes it to crash after too many categories have been loaded up. The app works via a SplitViewController that lists the categories down the left and, once tapped, the product images show in the detailViewController on the right.
Selecting category after category eventually crashes the app.
I've used the instruments -> Leaks tool to trace the problem and I get told that NSString appendString is a leak. The number of strings leaked seems to match the number of products in the category selected so I'm guessing one of my loops holds the problem but, after playing around with AutoreleasePools I haven't solved it yet.
My code:
This method is called when the category is selected and parses an XML document
- (NSMutableArray*) processXML{
//NSAutoreleasePool *pool4 = [[NSAutoreleasePool alloc] init];
// Initialize the productEntries MutableArray declared in the header
products = [[NSMutableArray alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSMutableString *documentsDirectory = [[NSMutableString stringWithFormat:#"%#", [paths objectAtIndex: 0]] autorelease];
// paths to save inputs to
NSString *productsFile = [documentsDirectory stringByAppendingFormat: #"/products2.xml"];
NSData *data = [NSData dataWithContentsOfFile: productsFile];
// Create a new rssParser object based on the TouchXML "CXMLDocument" class, this is the object that actually grabs and processes the RSS data
NSError *error = nil;
CXMLDocument *rssParser = [[[CXMLDocument alloc] initWithData:(NSData *)data encoding:NSUTF8StringEncoding options:0 error:&error] autorelease];
// Create a new Array object to be used with the looping of the results from the rssParser
NSArray *resultNodes = NULL;
//NSString *xPathStart, *xPathEnd, *category, *finalStr;
NSString *xPathStart = [[NSString stringWithFormat:#""] autorelease];
NSString *xPathEnd = [[NSString stringWithFormat:#""] autorelease];
NSString *category = [[NSString stringWithFormat:#""] autorelease];
NSString *finalStr = [[NSString stringWithFormat:#""] autorelease];
NSString *detailStr = [[NSString stringWithFormat: detailItem] autorelease];
// category to be parsed - build up xPath expression
if([detailStr isEqualToString: #"On Order Stock"]) {
xPathStart = #"/products/product[instock='2";
xPathEnd = #"']";
finalStr = [NSString stringWithFormat:#"%#%#", xPathStart, xPathEnd];
} else {
xPathStart = #"/products/product[category='";
category = detailItem;
xPathEnd = #"']";
finalStr = [NSString stringWithFormat:#"%#%#%#", xPathStart, category, xPathEnd];
}
resultNodes = [rssParser nodesForXPath: finalStr error:nil];
// Loop through the resultNodes to access each items actual data
for (CXMLElement *resultElement in resultNodes) {
Product *productItem = [[Product alloc] init];
[productItem setCode: [[[resultElement childAtIndex: 1] stringValue] autorelease]];
[productItem setImage: [[[resultElement childAtIndex: 5] stringValue] autorelease]];
// Add the product object to the global productEntries Array so that the view can access it.
[products addObject: productItem];
[productItem release];
}
//[pool4 release];
return products;
}
As you can see I went a little crazy with autoReealse on my strings. The other code segment that displays the images could be the problem although Leaks does mention processXML directly.
- (void) displayImages:(NSMutableArray *)anArray {
// create scrollView object
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 100)];
scrollView.pagingEnabled = NO;
scrollView.scrollEnabled = YES;
scrollView.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1];
scrollView.userInteractionEnabled = YES;
//create info area below scrollView
infoView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 100, self.view.frame.size.width, 100)];
[infoView setContentSize:CGSizeMake(self.view.frame.size.width, 100)];
infoView.backgroundColor = [UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:1];
infoView.scrollEnabled = NO;
[barcodeImgView setImage:[UIImage imageNamed:#"barcode2.jpg"]];
[infoView addSubview:codeLbl];
[infoView addSubview:nameLbl];
[infoView addSubview:priceLbl];
[infoView addSubview:dimensionsLbl];
[infoView addSubview:stockLbl];
[infoView addSubview:commentsLbl];
[infoView addSubview:barcodeImgView];
infoView.userInteractionEnabled = YES;
[codeLbl setText:[[NSString stringWithFormat:#""] autorelease]];
[nameLbl setText:[[NSString stringWithFormat:#""] autorelease]];
[priceLbl setText:[[NSString stringWithFormat:#""] autorelease]];
[commentsLbl setText:[[NSString stringWithFormat:#""] autorelease]];
[stockLbl setText:[[NSString stringWithFormat:#""] autorelease]];
[dimensionsLbl setText:[[NSString stringWithFormat:#""] autorelease]];
// hold x and y of each image
int x = 30;
int y = 50;
int noOfImages = [anArray count];
int maxRowWidth = (noOfImages / 3) + 1;
int xcount = 0; // position across the row, reset to zero and drop image down when equal to (noOfImages / 3) + 1
//NSAutoreleasePool *displayPool = [[NSAutoreleasePool alloc] init];
for(int i = 0; i < noOfImages; i++) {
// declare Product object to hold items in anArray
Product *prod = [[Product alloc] init];
prod = [anArray objectAtIndex: i];
// try for image in Documents folder, later checks it exists and if not uses Resource location
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSMutableString *documentsDirectory = [[NSString stringWithFormat:#"%#", [paths objectAtIndex: 0]] autorelease];;
// paths to save inputs to
NSString *imgName = [[NSString stringWithFormat:#"%#/%#", documentsDirectory, [prod image]] autorelease];
NSString *productName = [[NSString stringWithFormat:#"%#", [prod code]] autorelease];
// create and size image
UIImage *image = [UIImage imageWithContentsOfFile: imgName];
// set up button
UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(imageButtonClick:) forControlEvents:(UIControlEvents)UIControlEventTouchDown];
[button setTitle:productName forState:UIControlStateNormal];
button.titleLabel.font = [UIFont systemFontOfSize: 0];
[button setTitleColor: [UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:1] forState: UIControlStateNormal];
CGSize imageSize = image.size;
CGFloat height = imageSize.height;
CGFloat width = imageSize.width;
CGFloat ratio = 160 / width; // get ratio to divide height by
UIGraphicsBeginImageContext(CGSizeMake((height * ratio),160));
CGContextRef context = UIGraphicsGetCurrentContext();
[image drawInRect: CGRectMake(0, 0, height * ratio, 160)];
UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// create frame for image
CGRect newFrame = CGRectMake(x, y, 160,160);
UILabel *codeLabel = [[UILabel alloc] initWithFrame:CGRectMake(x, y - 20, 170, 20)];
codeLabel.text = productName;
codeLabel.textColor = [UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:1];
codeLabel.backgroundColor = [UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1];
[button setFrame: newFrame];
[button setBackgroundImage:smallImage forState:UIControlStateNormal];
[scrollView setContentSize:CGSizeMake((maxRowWidth * 160) + 160,self.view.frame.size.height - 100)];
[self.scrollView addSubview:button];
[self.scrollView addSubview:codeLabel];
xcount++;
x = x + 170; // move across the page
if(xcount == maxRowWidth) {
y = y + 210; // move down the screen for the next row
x = 30; // reset x to left of screen
xcount = 0; // reset xcount;
}
[prod release];
}
//[displayPool release];
[self.view addSubview: scrollView];
[self.view addSubview: infoView];
[scrollView release];
[infoView release];
[pool release];
}
By the way, pool is an autoreleasePool defined in the h file for the class.
I would really appreciate any specific help regarding my code or general tips on what could be wrong.
I see a few things wrong:
As was mentioned in the comments, you're abusing -autorelease in ways which make grown men cry and that which will crash your app.
-processXML is returning an owned object. You're allocating products and returning it. This breaks convention, because the method name does not begin with new or alloc, and does not contain copy. You should return [products autorelease]; instead. However, even that is shady, because since products isn't declared locally, it's probably an instance variable. In that case, what happens if processXML gets invoked multiple times? You have an owned object referenced by the instance variable, and suddenly you overwrite that reference with a new one... = memory leak.
Every time someone does MyClass * object = [[MyClass alloc] init]; object = [something thatReturnsAMyClass];, a kitten dies. If you then do [object release];, a second dies for good measure. This is a terrible, terrible memory leak (and a likely crash). You're allocating a new object and then immediately throwing it away but never releasing it. That you do this suggests you don't really get what a pointer is. I suggest reading "Everything you need to know about pointers in C"
On a lighter note, you should check out -[NSString stringByAppendingPathComponent:]. NSString has a bunch of really nice methods for dealing with paths.
I hope I don't come off as too harsh. :)
Some while ago at another post somebody said that one should read about the memory management and I was actually thinking that this answer is not really right. What is wrong with some trial and error and learning by doing. But after I had my painful experiences with memory I must admit that this guy was right. Take the time. Go and read the chapter on memory management in the apple documentation.
As above stated already you should not autorelease an object you do not own. But this might not cause the trouble. You can next to the instruments use Build+Analyze in the Build menu. This will help you to find out more.
Basically you need to release objects you create which you own (which one you own is in the documentation, basically those created with "alloc" and some more). If you cannot release them you assign them to the autorelease pool. This is the case with the "products" you return from processXML. When is the autorelease pool drained? This is when the next time the framework of the application is back in control (I think it was called run-loop or something). This can be a while and so you should not open to much objects which are assigned to an autorelease pool.
So to help you really read that chapter: memory management programming guide
I am trying to get the width of an NSString (ex. NSString *myString = #"hello"). Is there a way to do this?
Thanks.
Here's a relatively simple approach. Just create an NSAttributedString with the appropriate font and ask for its size:
- (CGFloat)widthOfString:(NSString *)string withFont:(NSFont *)font {
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName, nil];
return [[[NSAttributedString alloc] initWithString:string attributes:attributes] size].width;
}
UIFont * font ＝ [UIFont systemFontOfSize:15];
CGSize stringSize = [aString sizeWithFont:font];
CGFloat width = stringSize.width;
Using the UILabel's attributed string:
- (CGSize)getStringSizeWithText:(NSString *)string font:(UIFont *)font{
UILabel *label = [[UILabel alloc] init];
label.text = string;
label.font = font;
return label.attributedText.size;
}
Send the string a sizeWithAttributes: message, passing a dictionary containing the attributes with which you want to measure the string.
i dont know if you are suppose to use this in cocoa touch. if it is, then:
- (CGFloat)widthOfString:(NSString *)string withFont:(NSFont *)font {
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName, nil];
return [[[NSAttributedString alloc] initWithString:string attributes:attributes] size].width;
}
wont work.
in cocoa touch, you gotta add coretext framework and import the header
and write your code like this:
UIFont *font = [UIFont fontWithName:#"HelveticaNeue-BoldItalic" size:DEFAULT_FONT_SIZE];
// NSLog(#"%#", NSFontAttributeName);
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:font, (NSString *)kCTFontAttributeName, nil];
but, GEE!!!!!
NSMutableAttributedString *as = [[NSMutableAttributedString alloc] initWithString:self.caption attributes:attributes];
[as size].width;
there's no size this method in NSMutableAttributedString!
finally, this would work
[self.caption sizeWithFont:font].width
as for ios 7 and up this is the correct way:
NSString * buttonTitle = #"demo title";
CGSize stringSize = [buttonTitle sizeWithAttributes:#{NSFontAttributeName: [UIFont systemFontOfSize:17.0f]}];
This works with iOS 14.5
Objective-C
Define attributes:
NSDictionary *attributes = #{
NSFontAttributeName: [UIFont fontWithName:#"Helvetica" size:25],
NSStrokeWidthAttributeName: #(0),
NSStrokeColorAttributeName: [UIColor blackColor]
};
Get width and height:
- (CGFloat)widthOfString:(NSString *)string {
CGSize stringSize = [string sizeWithAttributes:attributes];
return stringSize.width;
}
- (CGFloat)heightOfString:(NSString *)string {
CGSize stringSize = [string sizeWithAttributes:attributes];
return stringSize.height;
}
Sorry my question was not detailed enough and is not exactly what I'm trying to do. I am using a text storage, layout manager and a text container. The solution is to use the layout manager to determine the rectangle that bounds the rect. Here is the code.
NSTextStorage *textStorage = [[NSTextStorage alloc] initWithString:#"hello"];
NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
NSTextContainer *textContainer = [[NSTextContainer alloc] init];
[layoutManager addTextContainer:textContainer];
[textContainer release];
[textStorage addLayoutManager:layoutManager];
[layoutManager release];
//Figure out the bounding rectangle
NSRect stringRect = [layoutManager boundingRectForGlyphRange:NSMakeRange(0, [layoutManager numberOfGlyphs]) inTextContainer:textContainer];
UIKit has a nice addition to NSString, making sizeWithAttributes: a bit lighter:
CGSize titleSize = [title sizeWithFont:titleFont
constrainedToSize:contentCellSize
lineBreakMode:UILineBreakModeWordWrap];
Here's Stephen's solution in Clozure Common Lisp, when using the Objective C bridge. I came across this post when searching for a solution, and I just rewrote Stephen's version which worked fine for me. Others using Clozure might find this helpful:
(defun string-width (str font)
(let* ((dict (#/dictionaryWithObjectsAndKeys: ns:ns-mutable-dictionary
font #$NSFontAttributeName
ccl:+null-ptr+))
(attr (#/initWithString:attributes: (#/alloc ns:ns-attributed-string)
(ccl::%make-nsstring str)
dict))
(size (#/size attr)))
(ns:ns-size-width size)))
This will work. You can try it.
NSDictionary *attrDict = #{NSFontAttributeName : [GenericUtility getOpenSansRegularFontSize:12]};
CGSize stringBoundingBox = [selectedReservationModel.DateLabel sizeWithAttributes: attrDict];
lblDeliveryDateWidth = stringBoundingBox.width;
Just in case you are wondering how to check a label size, you should use the UIFont, instead of the NSFont (not even sure if exists)