查看 IOS内存情况

使用内存和剩余内存

• (double)availableMemory
  {

  vm_statistics_data_t vmStats;
  mach_msg_type_number_t infoCount = HOST_VM_INFO_COUNT;
  kern_return_t kernReturn = host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&vmStats, &infoCount);
  if(kernReturn != KERN_SUCCESS)
  {
  return NSNotFound;
  }

  return ((vm_page_size * vmStats.free_count)/1024.0)/1024.0;
  }

• (double)usedMemory
  {
  task_basic_info_data_t taskInfo;
  mach_msg_type_number_t infoCount = TASK_BASIC_INFO_COUNT;
  kern_return_t kernReturn = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&taskInfo, &infoCount);
  if(kernReturn != KERN_SUCCESS)
  {
  return NSNotFound;
  }
  return taskInfo.resident_size/1024.0/1024.0;
  }