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  • iOS 获取 当前设备 可用内存 及当前 应用 所占内存

    // 获取当前设备可用内存及所占内存的头文件
    #import <sys/sysctl.h>
    #import <mach/mach.h>
    
     
     
    // 获取当前设备可用内存(单位:MB)
    - (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;
    }
    
    // 获取当前任务所占用的内存(单位:MB)
    - (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;
    }
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  • 原文地址:https://www.cnblogs.com/yunis/p/3929520.html
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