如何以编程方式获取ios中的内存使用信息？

Question

我需要获取内存使用信息，例如（可用RAM，可用内部存储）。

Answer 1

#import <mach/mach.h>
#import <mach/mach_host.h>

void print_free_memory ()
{
    mach_port_t host_port;
    mach_msg_type_number_t host_size;
    vm_size_t pagesize;

    host_port = mach_host_self();
    host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);
    host_page_size(host_port, &pagesize);        

    vm_statistics_data_t vm_stat;

    if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) != KERN_SUCCESS) {
        NSLog(@"Failed to fetch vm statistics");
    }

    /* Stats in bytes */ 
    natural_t mem_used = (vm_stat.active_count +
                          vm_stat.inactive_count +
                          vm_stat.wire_count) * pagesize;
    natural_t mem_free = vm_stat.free_count * pagesize;
    natural_t mem_total = mem_used + mem_free;
    NSLog(@"used: %u free: %u total: %u", mem_used, mem_free, mem_total);
}

在appdelegate中使用此方法，并在您想要检查...欢呼时调用

Answer 2

运行应用程序后，您可以登录Xcode IDE。

通过选择调试导航器，您可以以图形或百分比的形式查看内存使用情况。

Answer 3

下面的代码可以帮助您获得所需内容。

- (NSNumber*) totalMemory
{
   //Return the current device total memory
    return [[UIDevice currentDevice] totalMemory];
}


- (NSNumber*) userMemory
{
   //Return the current device non-kernel memory
    return [[UIDevice currentDevice] userMemory];
}


- (NSNumber*) freeMemory
{
   //Return the current device free memory
    return [[UIDevice currentDevice] freeMemory];
}


- (NSNumber*) totalDiskSpace
{
   //Return the current device total disk space
    return [[UIDevice currentDevice] totalDiskSpace];
}


- (NSNumber*) freeDiskSpace
{
   //Return the current device free disk space
    return [[UIDevice currentDevice] freeDiskSpace];
}