//当前设备可用内存
- (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; }
//当前任务所占内存
- (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; }