Huge memory usage in ARC - objective-c

Question

I have these functions called in a thread that draw a NSView:
+(NSFont *)customFontWithName:(NSString *)fontName AndSize:(float)fontSize
{
NSData *data = [[[NSDataAsset alloc]initWithName:fontName] data];
CGDataProviderRef fontProvider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
CGFontRef cgFont = CGFontCreateWithDataProvider(fontProvider);
CGDataProviderRelease(fontProvider);
NSDictionary *fontsizeAttr=[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:fontSize], NSFontSizeAttribute,
nil];
CTFontDescriptorRef fontDescriptor = CTFontDescriptorCreateWithAttributes((__bridge CFDictionaryRef)fontsizeAttr);
CTFontRef font = CTFontCreateWithGraphicsFont(cgFont, 0, NULL, fontDescriptor);
CFRelease(fontDescriptor);
CGFontRelease(cgFont);
NSFont* retval= (__bridge NSFont*)font;
CFRelease(font);
return retval;
}
and this:
+(NSAttributedString*) createCurrentTextWithString:(NSString *)string AndMaxLenght:(float)length AndMaxHeight:(float)maxHeight AndColor:(NSColor *)color AndFontName: (NSString*) fontName
{
float dim=0.1;
NSDictionary *dictionary=[NSDictionary dictionaryWithObjectsAndKeys:[CustomFont customFontWithName:fontName AndSize:dim], NSFontAttributeName,color, NSForegroundColorAttributeName, nil];
NSAttributedString * currentText=[[NSAttributedString alloc] initWithString:string attributes: dictionary];
while([currentText size].width<maxLength&&[currentText size].height<maxHeight)
{
dictionary=[NSDictionary dictionaryWithObjectsAndKeys:[CustomFont customFontWithName:fontName AndSize:dim], NSFontAttributeName,color, NSForegroundColorAttributeName, nil];
currentText=[[NSAttributedString alloc] initWithString:string attributes: retval];
dim+=0.1;
}
return currentText;
}
All the objects created in these functions were correctly deallocated and I can't find memory leaks, but this code caused an huge use of memory (many gigabytes) and I can't understand why. Please help.

Answer 1

I found a solution. For some reasons, that I don't know, the code:
NSData *data = [[[NSDataAsset alloc]initWithName:fontName] data];
CGDataProviderRef fontProvider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
CGFontRef cgFont = CGFontCreateWithDataProvider(fontProvider);
allocs large memory that will not be deallocate any more. So I create a static variable CGFontRef for each custom font I have. This is the only way I found:
static CGFontRef font1;
....
static CGFontRef font;
+(CGFontRef) getFontWithValue: (int) value
{
switch (value)
{
case 1:
return font1;
break;
...
case n:
return fontn;
default:
return NULL;
}
}
And
+(NSFont*) customFontWithName:(int)fontName AndSize:(float)fontSize
{
NSDictionary *fontsizeAttr=[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:fontSize], NSFontSizeAttribute,
nil];
CTFontDescriptorRef fontDescriptor = CTFontDescriptorCreateWithAttributes((__bridge CFDictionaryRef)fontsizeAttr);
CTFontRef font = CTFontCreateWithGraphicsFont([CustomFont getFontWithValue:fontName], 0, NULL, fontDescriptor);
CFRelease(fontDescriptor);
NSFont* retval= (__bridge NSFont*)font;
CFRelease(font);
return retval;
}
I still don't understand why there is this memory leak and this is not a solution, but only a trick, but it works.