头文件
#import <UIKit/UIKit.h>
#import <mach/mach.h>
#import <mach/mach_host.h>
@interface UIDevice (Utils)
+ (natural_t)getFreeMemory;
@end
实现文件
#import "UIDevice+Utils.h"
@implementation UIDevice (Utils)
+ (natural_t)getFreeMemory
{
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");
return 0;
}
/* Stats in bytes */
natural_t mem_free = vm_stat.free_count * pagesize;
return mem_free;
}
@end
参考: http://stackoverflow.com/questions/4579642/monitor-memory-usage-in-an-iphone-app
http://www.cocoachina.com/bbs/read.php?tid=83996
本文介绍了如何在iOS应用中获取内存使用情况的方法,通过调用内核API来监测应用程序的内存消耗,并提供了详细的实现代码。
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