設備運行內存過小 IOS獲取手機設備運行內存的方法－IT工程師數位筆記本

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//當前設備可用內存

- (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;}

//當前任務所占內存

- (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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