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Editorial Team
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Asked: 2026-06-08T16:00:46+00:00

This code gives me a leak – over 100 mb by 100 iterations. If

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This code gives me a leak – over 100 mb by 100 iterations. If i write [imageName release] it crashes with “message sent to deallocated instance”. I just can’t even think what can be the source of a problem.

NSString* imageName=[NSString stringWithUTF8String:(const char*)sqlite3_column_text(statement, 5)];
imageName =[imageName stringByReplacingOccurrencesOfString:@"-" withString:@"_"];
imageName =[imageName stringByReplacingOccurrencesOfString:@"." withString:@"-"];

[ret setQuestionImage:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:imageName ofType:@"jpg"]]];
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1 Answer

  1. Editorial Team

    The problem is the strings and images created by these convenience methods are autoreleased, and the autoreleasing doesn’t occur early enough. If you eplicitly release them, however, they’ll be double-freed upon autorelease. Try to wrap all iterations into an autorelease pool:

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *imageName=[NSString stringWithUTF8String:(const char *)sqlite3_column_text(statement, 5)];
imageName = [imageName stringByReplacingOccurrencesOfString:@"-" withString:@"_"];
imageName = [imageName stringByReplacingOccurrencesOfString:@"." withString:@"-"];

[ret setQuestionImage:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:imageName ofType:@"jpg"]]];
[pool release];
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