#import "ViewController.h"
// Get the header file of the available memory of the current device and the memory occupied
#import <sys/sysctl.h>
#import <mach/mach.h>
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
double f1 = [self availableMemory];
NSLog(@"%.f",f1);
double f2 = [self usedMemory];
NSLog(@"%.f",f2);
}
// Get the available memory of the current device ( unit: 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;
}
// Get the memory occupied by the current task (unit: 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;
}
@end