iOS Development--Practical Technical Chapter OC & Get Memory usage

Get Memory usage

1IOS gets the available memory for the current device and the memory occupied by the current application ( -- to- the  One: A: the)2 reproduced3 ▼4 Tags: memory memory for iOS device memory it classification: iOS5 6 //gets the current device's available memory and the header file of the occupied memory7 8 #import<sys/sysctl.h>9 Ten #import<mach/mach.h> One  A  -   -  the   -  - //get current device available memory (in MB) -  +- (Double) Availablememory -  + { A  at vm_statistics_data_t vmstats; -  -mach_msg_type_number_t Infocount =Host_vm_info_count; -  -kern_return_t Kernreturn =Host_statistics (Mach_host_self (), -  in Host_vm_info, -  to(host_info_t) &Vmstats, +  -&infocount); the  *    $ Panax Notoginseng   if(Kernreturn! =kern_success) { -  the     returnNsnotfound; +  A   } the  +    -  $   return((Vm_page_size *vmstats.free_count)/1024.0) /1024.0; $  - } -  the  - //gets the memory occupied by the current task in megabytes (MB)Wuyi  the- (Double) Usedmemory -  Wu { -  About 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 (), A  + Task_basic_info, the  -(task_info_t) &TaskInfo, $  the&infocount); the  the  the   if(Kernreturn! =kern_success -  in       ) { the  the     returnNsnotfound; About  the   } the  the    +  -   returnTaskinfo.resident_size/1024.0/1024.0; the Bayi}

iOS Development--Practical Technical Chapter OC & Get Memory usage