如何在iPhone/iPad上获得当前可用的RAM

Question

我想开发显示iPhone/iPad的免费RAM的应用程序，但是我找不到有关如何操作的信息。 我的目标C

Answer 1

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); 
}