iOS 獲取 當前裝置 可用記憶體 及當前 應用 所佔記憶體
// 獲取當前裝置可用記憶體及所佔記憶體的標頭檔案
#import <sys/sysctl.h>
#import <mach/mach.h>
// 獲取當前裝置可用記憶體(單位：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;
}
// 獲取當前任務所佔用的記憶體（單位：MB）
- (double
{
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;
}