获取iOS的内存方法

#import

vm_size_t getUsedMemory() {

  task_basic_info_data_t 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 {

    return 0;

  }

}

获取剩余内存

#import

vm_size_t getFreeMemory() {

  mach_port_t host = mach_host_self();

  mach_msg_type_number_t size = sizeof(vm_statistics_data_t) / sizeof(integer_t);

  vm_size_t pagesize;

  host_page_size(host, &pagesize);

  host_statistics(host, HOST_VM_INFO, (host_info_t)&vmstat, &size);

  return vmstat.free_count * pagesize;

}