#import "NeiCunViewController.h"
// 查询剩余内存导入头文件
#import <sys/sysctl.h>
#import <mach/mach.h>
// 查询所剩存储空间导入头文件
#import <sys/param.h>
#import <sys/mount.h>
@interface NeiCunViewController ()
@end
@implementation NeiCunViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self addSubViews];
}
- (void)addSubViews
{
self.view.backgroundColor = [UIColor whiteColor];
NSLog(@"手机目前所剩内存空间为 : %f MB", [self availableMemory]);
NSLog(@"手机目前应用所占内存为 : %f MB", [self usedMemory]);
NSLog(@"手机目前剩余存储空间为 : %@ MB", [self freeDiskSpaceInBytes]);
}
#pragma mark -- 获取目前手机所剩存储空间
- (NSString *) freeDiskSpaceInBytes{
struct statfs buf;
long long freespace = -1;
if(statfs("/var", &buf) >= 0){
freespace = (long long)(buf.f_bsize * buf.f_bfree);
}
return [NSString stringWithFormat:@"%qi" ,freespace/1024/1024];
}
#pragma mark -- 获取当前设备可用内存(单位: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;
}
#pragma mark -- 获取当前任务所占用的内存(单位:MB)
- (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;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}