{"id":3895,"date":"2014-03-30T06:17:19","date_gmt":"2014-03-30T06:17:19","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-cfstring-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:42:27","modified_gmt":"2022-08-30T15:42:27","slug":"problem-about-cfstring-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-cfstring-collection-of-common-programming-errors\/","title":{"rendered":"problem about cfstring-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/c2e0619983f017acfd1832bb903a343f?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nKonerak<br \/>\nxcode4 warnings suppress-warnings cfstring<br \/>\nI am using something like:illegalCharacters = [[NSCharacterSet characterSetWithCharactersInString:@&#8221;\\x00\\..&#8221;] retain];Xcode 4 displays a warning for it (Semantic issue: CFString literalcontains NUL character)Is there any way to fix that? I need that NUL character because I am stripping those characters defined in my &#8220;illegalCharacters&#8221; out of a string.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/70ac0eebe78d4bf24c95211f37e6c4a7?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ndhomes<br \/>\niphone memory nsstring dealloc cfstring<br \/>\nan app I&#8217;m working on keeps crashing when run on the iPhone but not on the Simulator (although a warning is shown when run without symbolic malloc_error_break, but the app keeps working on the Sim)I&#8217;m not manually releasing any string, instead, i use: [[[NSString \/ NSMutableString alloc] init] autorelease]; (which I do all the time for other apps and have never given me a problem)Now when I set malloc_error_break as a breakpoint I get:2012-03-07 17:04:06.072 columns[15487:f803] *** -[CFString re<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/833099b6cafa7e9143ccd19170892100?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nankit mehta<br \/>\niphone memory-management cfstring<br \/>\nI am trying to access all the first name value field from the address book. I am using this code for thisCFStringRef firstName = ABRecordCopyValue(aSource, kABPersonFirstNameProperty); first_name=[NSString stringWithFormat:@&#8221;%@&#8221;,firstName]; CFRealease(firstname)I am not using ARC. So i need to CFRealease(firstname) at the end. But in my code when i add CFRealease(firstname) my app crashes at this point and without this the app works fine.But when i try to analyse my app by using analyzer it says<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/290aabcb6c2ee989d85d8dae0e9ad0fa?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nEmptyStack<br \/>\niphone objective-c nsstring cfstring<br \/>\ni my iphone app while assigning a string value to the table view its crashing, i have the following code in cellForRowAt index path methodwhile assigning a string value to the table viewNSMutableArray *arrTrimmedTblData=[[NSMutableArray alloc]init]; NSMutableString *strTrimmedTblData; for(int intVar=0;intVar&lt;[array count];intVar++) {strTrimmedTblData = [NSMutableString stringWithFormat:@&#8221;%@&#8221;,[array objectAtIndex:intVar]];[strTrimmedTblData replaceOccurrencesOfString:@&#8221;(&#8221; withString:@&#8221;&#8221; opti<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f1d5ca7939336d416f1d907cac20f1ba?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\njlordo<br \/>\npdf monotouch dispose cgpdfdocument cfstring<br \/>\nI am trying to create a thumbnail image of pdf in Monotouch but the app crashes sometimes and throws below error.Stacktrace:at MonoTouch.CoreFoundation.CFString.Dispose () [0x00000] in \/Developer\/MonoTouch\/Source\/monotouch\/src\/shared\/CoreFoundation\/CFString.cs:131 at MonoTouch.CoreFoundation.CFUrl.FromFile (string) [0x00048] in \/Developer\/MonoTouch\/Source\/monotouch\/src\/shared\/CoreFoundation\/CFUrl.cs:79 at MonoTouch.CoreGraphics.CGPDFDocument.FromFile (string) [0x00000] in \/Developer\/MonoTouch\/So<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/cddd3d4ab0a08a03f552cef036bb0c39?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nBen Trengrove<br \/>\ncocos2d-iphone crash cfstring<br \/>\nHere is the complete error in debugger :2012-11-11 17:57:34.534 Killer[13745:707] *** -[CFString copyWithZone:]: message sent to deallocated instance 0xee57540 2012-11-11 18:01:59.231 Killer[13745:707] *** -[CFString class]: message sent to deallocated instance 0xee57540 (lldb) Programming with Obj C and Cocos 2d v1.0.1, here is the crashing line player.zombieImage = [playersPicturesZombies objectAtIndex:idx];The strange thing is that i am doing the potential crashing operation 10 times befo<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/0e8516d3703e35b7df26986815b23e7a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nCodaFi<br \/>\nios ipad nsstring init cfstring<br \/>\nSo I&#8217;m calling this in a method:-(id)initWithContentURL:(NSString *)url { if (self = [super init]) {NSLog(@&#8221;xSheetMusicViewController &#8211; %@&#8221;,url);\/\/ Casting an NSString object pointer to a CFStringRef:CFStringRef cfString = (CFStringRef)url; CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), cfString, NULL, NULL);pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL);}return self; }Which crashes right at the NSLog at the line marked:CFURLRef pdfURL = CFBundleCopyResourceURL(CFB<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/b405b994cc05e0bb0ba0cb5b9c3fd1a3?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nItzik984<br \/>\nc++ eclipse quicktime cfstring<br \/>\nI am trying to use quicktime in order to play sounds from my C++ code running on eclipse.This is just an example:#include &lt;iostream&gt; #include &lt;QuickTime\/Movies.h&gt;using namespace std;int main() { CFStringRef lines = CFSTR(&#8220;lines&#8221;);&lt;&#8212;- Error CFStringRef mp3 = CFSTR(&#8220;mp3&#8221;); &lt;&#8212;- ErrorCFURLRef filelocation;CFBundleRef gameBundle = CFBundleGetMainBundle(); filelocation = CFBundleCopyResourceURL(gameBundle, lines, mp3, NULL); return 0; }I can define the lines variable of type C<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Konerak xcode4 warnings suppress-warnings cfstring I am using something like:illegalCharacters = [[NSCharacterSet characterSetWithCharactersInString:@&#8221;\\x00\\..&#8221;] retain];Xcode 4 displays a warning for it (Semantic issue: CFString literalcontains NUL character)Is there any way to fix that? I need that NUL character because I am stripping those characters defined in my &#8220;illegalCharacters&#8221; out of a string. dhomes iphone memory nsstring [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1],"tags":[],"class_list":["post-3895","post","type-post","status-publish","format-standard","hentry","category-semantic","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=3895"}],"version-history":[{"count":1,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3895\/revisions"}],"predecessor-version":[{"id":8793,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/3895\/revisions\/8793"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=3895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=3895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=3895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}