Essential Books

Logging by Appending to a File

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NSLog is good, but you can also log by appending to a file instead, using code like: 

NSFileHandle* fh = [NSFileHandle fileHandleForWritingAtPath:path];
if ( !fh ) {
    [[NSFileManager defaultManager] createFileAtPath:path contents:nil attributes:nil];
    fh = [NSFileHandle fileHandleForWritingAtPath:path];
}
if ( fh ) {
    @try {
        [fh seekToEndOfFile];
        [fh writeData:[self dataUsingEncoding:enc]];
    }
    @catch (...) {
    }
    [fh closeFile];
}
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Logging:
*Logging
*Logging
*NSLog Output Format
*Logging Variable Values
*Removing Log Statements from Release Builds
*Empty message is not printed
*Using FUNCTION
*NSLog vs printf
*Logging NSLog meta data
*NSLog and BOOL type
*Logging by Appending to a File
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