Databases
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    <p>A method in a <code>NSData</code> category</p> <pre><code>- (NSString*)encodeBase64 { static char* alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; unsigned int length = self.length; unsigned const char* rawData = self.bytes; //empty data = empty output if (length == 0) { return @""; } unsigned int outputLength = (((length + 2) / 3) * 4); //let's allocate buffer for the output char* rawOutput = malloc(outputLength + 1); //with each step we get 3 bytes from the input and write 4 bytes to the output for (unsigned int i = 0, outputIndex = 0; i &lt; length; i += 3, outputIndex += 4) { BOOL triple = NO; BOOL quad = NO; //get 3 bytes (or only 1 or 2 when we have reached the end of input) unsigned int value = rawData[i]; value &lt;&lt;= 8; if (i + 1 &lt; length) { value |= rawData[i + 1]; triple = YES; } value &lt;&lt;= 8; if (i + 2 &lt; length) { value |= rawData[i + 2]; quad = YES; } //3 * 8 bits written as 4 * 6 bits (indexing the 64 chars of the alphabet) //write = if end of input reached rawOutput[outputIndex + 3] = (quad) ? alphabet[value & 0x3F] : '='; value &gt;&gt;= 6; rawOutput[outputIndex + 2] = (triple) ? alphabet[value & 0x3F] : '='; value &gt;&gt;= 6; rawOutput[outputIndex + 1] = alphabet[value & 0x3F]; value &gt;&gt;= 6; rawOutput[outputIndex] = alphabet[value & 0x3F]; } rawOutput[outputLength] = 0; NSString* output = [NSString stringWithCString:rawOutput encoding:NSASCIIStringEncoding]; free(rawOutput); return output; } </code></pre>
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    1. POHow to Base64 encoding on the iPhone
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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