1、引入頭文件

#include?<sys/sysctl.h>

#include?<mach/mach.h>

2、檢測函數

//MARK:?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;
}


//MARK:?已使用內存
-?(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;
}

3、輸出內存狀況：

每隔三秒輸出一次內存使用情況：

NSTimer?*timer?=?[NSTimer?scheduledTimerWithTimeInterval:3?
?????????????????????????????????????????????target:self?
???????????????????????????????????????????selector:@selector(onTimer:)?
???????????????????????????????????????????userInfo:nil?
????????????????????????????????????????????repeats:YES];
?

-?(void)onTimer:(id)sender
{
?????NSLog(@"?使用內存??%f??剩余內存??%f",[self?usedMemory],[self?availableMemory]);
}轉?http://www.cnblogs.com/foxmin/archive/2012/05/04/2482102.html

轉載于:https://www.cnblogs.com/likwo/archive/2012/05/04/2482569.html

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