获取iphone磁盘总大小、已使用空间、空闲空间 

1. [代码][C/C++]代码    

-(float)getFreeDiskspace {
    float totalSpace;
    float totalFreeSpace;
    float totalUsedSpace;
    
    NSError *error = nil;  
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];  
    
    if (dictionary) {  
        NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];  
        NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
        totalSpace = [fileSystemSizeInBytes floatValue];
        totalFreeSpace = [freeFileSystemSizeInBytes floatValue];
        totalUsedSpace = totalSpace - totalFreeSpace;
        http://www.huiyi8.com/css3/
        float freePercent = totalFreeSpace/totalSpace;
        float usedPercent = totalUsedSpace/totalSpace;
        
        freePercentLabel.text  = [[NSString stringWithFormat:@"%.2f",freePercent*100]    stringByAppendingString:@"%"];
        usedPercentLabel.text  = [[NSString stringWithFormat:@"%.2f",usedPercent*100]    stringByAppendingString:@"%"];
        totalSpaceLabel.text   = [[NSString stringWithFormat:@"%.2f",((totalSpace/1024.0f)/1024.0f/1024.0f)]     stringByAppendingString:@"GB"];
        usedSpaceLabel.text    = [[NSString stringWithFormat:@"%.2f",((totalUsedSpace/1024.0f)/1024.0f/1024.0f)] stringByAppendingString:@"GB"];
        freeSpaceLabel.text    = [[NSString stringWithFormat:@"%.2f",((totalFreeSpace/1024.0f)/1024.0f/1024.0f)] stringByAppendingString:@"GB"];
        
        NSLog(@"Memory Capacity of %f GB with %f GB Free memory available.", ((totalSpace/1024.0f)/1024.0f/1024.0f), ((totalFreeSpace/1024.0f)/1024.0f)/1024.0f);
    } else {  css3教程
        NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);  
    }  
    return totalFreeSpace;
}