IPhone application memory continues to grow

Question

I was ready to send my first app to the app store. Checked for leaks, tested on devices, works. I wanted to make sure that my memory was under control, so I controlled the secretions and, alas, nothing was controlled.

I tested several areas of my application, but I focused on several large areas where constant use by the user could get the memory out of control very easily. The information from Allocations / Heapshots is hard for me to read, so I hope that someone out there can Rosetta Stone do it for me.

I will try to give as many details as possible, and if that is not enough, just scream and I will write more.

The application starts in the menu. When a button is clicked, a view appears through presentModalViewController. The view opens, and in the background the database opens and a random row is selected and saved. So, the cycle: Press "Main Menu" - "Open View" → "Close View", makes my memory grow at a speed of 10 KB-25 KB each time.

Some thoughts:

• Some parts of my presentation are created through IB, some of which are just a regular .png file. I read that an earlier build had problems freeing up and redistributing these resources, which caused a memory leak.
• I used button.layer.borderWidth / borderColor / cornerRadius / backgroundColor with some of my buttons that were originally created in IB. Is this no no? (Removing them helps a bit, but the problem still appears).

For the curious, this is the call stack for the largest heap growth:

0 libSystem.B.dylib calloc 1 CoreGraphics CGGlyphBitmapCreate 2 CoreGraphics CGFontCreateGlyphBitmap8 3 CoreGraphics CGFontCreateGlyphBitmap 4 CoreGraphics CGGlyphLockLockGlyphBitmaps 5 libRIP.A.dylib ripc_DrawGlyphs 6 CoreGraphics draw_glyphs 7 CoreGraphics CGContextShowGlyphsWithAdvances 8 WebCore WebCore::showGlyphsWithAdvances(WebCore::FloatPoint const&, WebCore::SimpleFontData const*, CGContext*, unsigned short const*, CGSize const*, unsigned long) 9 WebCore WebCore::Font::drawGlyphs(WebCore::GraphicsContext*, WebCore::SimpleFontData const*, WebCore::GlyphBuffer const&, int, int, WebCore::FloatPoint const&, bool) const 10 WebCore WebCore::Font::drawSimpleText(WebCore::GraphicsContext*, WebCore::TextRun const&, WebCore::FloatPoint const&, int, int) const 11 WebCore WebCore::Font::drawText(WebCore::GraphicsContext*, WebCore::TextRun const&, WebCore::FloatPoint const&, int, int) const 12 WebKit drawAtPoint(unsigned short const*, int, WebCore::FloatPoint const&, WebCore::Font const&, WebCore::GraphicsContext*, bool, WebCore::BidiStatus*, int) 13 WebKit -[NSString(WebStringDrawing) __web_drawAtPoint:forWidth:withFont:ellipsis:letterSpacing:includeEmoji:measureOnly:renderedStringOut:drawUnderline:] 14 WebKit -[NSString(WebStringDrawing) __web_drawAtPoint:forWidth:withFont:ellipsis:letterSpacing:includeEmoji:measureOnly:renderedStringOut:] 15 WebKit -[NSString(WebStringDrawing) __web_drawAtPoint:forWidth:withFont:ellipsis:letterSpacing:includeEmoji:measureOnly:] 16 WebKit -[NSString(WebStringDrawing) _web_drawAtPoint:forWidth:withFont:ellipsis:letterSpacing:includeEmoji:] 17 UIKit -[NSString(UIStringDrawing) drawAtPoint:forWidth:withFont:lineBreakMode:letterSpacing:includeEmoji:] 18 UIKit -[NSString(UIStringDrawing) drawAtPoint:forWidth:withFont:fontSize:lineBreakMode:baselineAdjustment:includeEmoji:] 19 UIKit -[NSString(UIStringDrawing) drawAtPoint:forWidth:withFont:fontSize:lineBreakMode:baselineAdjustment:] 20 UIKit -[UILabel _drawTextInRect:baselineCalculationOnly:] 21 UIKit -[UILabel drawTextInRect:] 22 UIKit -[UILabel drawRect:] 23 UIKit -[UIView(CALayerDelegate) drawLayer:inContext:] 24 QuartzCore -[CALayer drawInContext:] 25 QuartzCore backing_callback(CGContext*, void*) 26 QuartzCore CABackingStoreUpdate_ 27 QuartzCore CA::Layer::display_() 28 QuartzCore -[CALayer _display] 29 QuartzCore CA::Layer::display() 30 QuartzCore -[CALayer display] 31 QuartzCore CA::Layer::display_if_needed(CA::Transaction*) 32 QuartzCore CA::Context::commit_transaction(CA::Transaction*) 33 QuartzCore CA::Transaction::commit() 34 QuartzCore CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) 35 CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ 36 CoreFoundation __CFRunLoopDoObservers 37 CoreFoundation __CFRunLoopRun 38 CoreFoundation CFRunLoopRunSpecific 39 CoreFoundation CFRunLoopRunInMode 40 GraphicsServices GSEventRunModal 41 GraphicsServices GSEventRun 42 UIKit UIApplicationMain 43 GRE Words main /Users/admin/Dropbox/GRE Words/main.m:14 44 GRE Words start 

If you think the code code will help, let me know. I felt that I was moving forward, and it was rather discouraging.

Thanks.

Answer 1

Use Heapshot to find memory; see bbum blog

Basically, there is a method for launching tools to select tools, execute heaps, run the intuition of your code, and repeat once every 3 or 4 times. This will indicate a memory that is allocated and not issued during iterations.

To find out what results are revealed to see individual distributions.

If you need to see where they are stored, released, and autorealized for tools using the object:

Starting in the tools, in Allocations set "Record of samples" is enabled (you must stop recording to set the parameter). Try to start the collector, stop recording, find ivar (datePickerView) there, expand, and you can see where everything is saved, releases and auto-implementers happened.

I have used this many times, and it really helped, good luck.