File Memory size calculation, memory size Calculation

File Memory size calculation, memory size Calculation

/**

* Calculate the size of all files in a file.

Note: to calculate the size of all files in a folder, you must first obtain all files, then obtain the size of all files, and then add them together.

*/

NSFileManager * manager = [NSFileManager defamanager manager];

// Extract the file that requires Calculation

NSArray * arr = [manager subpathsAtPath: @ "/Users/zhangyunjiang/Desktop"];

NSMutableString * strM = [NSMutableString string];

NSMutableString * strM1 = [NSMutableString string];

For (int I = 0; I <arr. count; I ++ ){

// Add all file names to the string

[StrM appendFormat: @ "// Users/zhangyunjiang/Desktop/% @", arr [I];

}

// Convert the string with the added file name into an array

NSArray * arr1 = [strM componentsSeparatedByString: @ "//"];

For (int j = 0; j <arr. count; j ++ ){

// Extract the attribute content of each file name from the array

NSDictionary * dic = [manager attributesOfItemAtPath :( arr1 [j]) error: nil];

// Find the memory size occupied by files in the content

NSString * str3 = dic [NSFileSize];

[StrM1 appendFormat: @ "-% @", str3];

}

// Calculate

NSArray * arr2 = [strM1 componentsSeparatedByString: @ "-"];

Double sum = 0;

For (int I = 0; I <arr2.count; I ++ ){

NSString * str3 = [arr2 objectAtIndex: I];

If (str3 = nil ){

}

Else

{

Sum + = [str3 intValue];

}

}

// Convert the space into a GM

Double newsum = sum/1024/1024/1024;

NSLog (@ "% f", sum );

NSLog (@ "% f", newsum );

}

Return 0;