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POCrash after assign UIImage to UIImageView.image
 

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  1. POCrash after assign UIImage to UIImageView.image
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    <p>In my code:</p> <p>*.h file</p> <pre><code>UIImageView* imgFACE; UIImage* imgF; UIImage* imgG; </code></pre> <p>initialization:</p> <pre><code>imgF = [UIImage imageNamed: @"f.png"]; imgG = [UIImage imageNamed: @"g.png"]; UIImageView *img; img = [[UIImageView alloc]initWithFrame:FACE_RECT]; [self addSubview:img]; self.imgFACE = img; [img release]; </code></pre> <p>in drawRect, frequently:</p> <pre><code>NSLog(@"[%@]", imgF); if(something) self.imgFACE.image = imgF; else self.imgFACE.image = imgG; </code></pre> <p>standard result of NSLog is:</p> <pre><code>[&lt;UIImage: 0x5db6b0&gt;] </code></pre> <p>sometimes this simply code generate crash, result of NSLog is strange:</p> <pre><code>[Length 4 (2 blocks, 1 used, block 0 is at 0) 4 0x146d22c0 { NSColor = "UIDeviceWhiteColorSpace 0 1"; NSFont = "&lt;UICTFont: 0x1454fc00&gt; font-family: \".HelveticaNeueInterface-M3\"; font-weight: normal; font-style: normal; font-size: 12.00pt"; NSParagraphStyle = "Alignment 0, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 0/0, LineHeightMultiple 0, LineBreakMode 4, Tabs (\n 28L,\n 56L, \n 84L,\n 112L,\n 140L,\n 168L,\n 196L,\n 224L,\n 252L,\n 280L,\n 308L,\n 336L\n), DefaultTabInterval 0, Blocks (null), Lists (null), BaseWritingDirection -1, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0"; NSShadow = "NSShadow {0, -1} color = {(null)}"; } </code></pre> <p>What's a kind of object?</p> <p>CRASH LOG:</p> <pre><code>0libobjc.A.dylib 0x3b393b26 objc_msgSend + 5 1NOM2 0x000ad7a5 -[PanelInfoView myTimerMethod] (PanelInfoView.m:527) + 309157 2Foundation 0x319a3ecd __NSFireTimer + 64 3CoreFoundation 0x30f8b0e7 &lt;redacted&gt; + 14 4CoreFoundation 0x30f8acff &lt;redacted&gt; + 782 5CoreFoundation 0x30f8909b &lt;redacted&gt; + 1210 6CoreFoundation 0x30ef3ce7 CFRunLoopRunSpecific + 522 7CoreFoundation 0x30ef3acb CFRunLoopRunInMode + 106 8GraphicsServices 0x35c14283 GSEventRunModal + 138 9UIKit 0x33795a41 UIApplicationMain + 1136 10NOM2 0x0006e44d main (main.m:25) + 50253 </code></pre> <p>As I think it's result of the memory leak. imgF &amp; imgG are initialized only once.</p> <p>What's happen with this UIImage?</p>
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    1. UStheWalker
    1. UStheWalker
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COFor convention (and another points) use dot notation instead of `->`
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      1. POCrash after assign UIImage to UIImageView.image
      1. USNekak Kinich
    2. CO@NekakKinich Actually the use of `->` is correct here. This directly accesses the ivar. Since there is no property, use of `self.imageFACE` would be incorrect. Accessing ivars via `self->` in Objective-C is not required. It's correct, but unnecessary.
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      1. POCrash after assign UIImage to UIImageView.image
      1. USrmaddy
    3. CO@skippy If you are going to post a question about a crash, it really helps if you tell us what the full error message is and provide details about where the error is coming from.
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      1. POCrash after assign UIImage to UIImageView.image
      1. USrmaddy
 

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