非常适合一些不能正常真机测试的兄弟

我们做的东西就要插个硬件，没办法真接上真机，悲剧啊

#import <mach/mach.h>

- (vm_size_t)getUsedMemory

{

    struct task_basic_info info;

    mach_msg_type_number_t size = sizeof(info);

    kern_return_t kerr = task_info(mach_task_self(),

                                   TASK_BASIC_INFO,

                                   (task_info_t)&info,

                                   &size);

    if( kerr == KERN_SUCCESS ) 

    {

        return info.resident_size;

    }

    else

    {

        NSLog(@"Error with task_info(): %s", mach_error_string(kerr));

    }

    return -1;