iPhone开发之内存监测代码实现
新建一个继承NSObject的类ICMemoryHelper,.m文件的代码如下所示:
#import "ICMemoryHelper.h" #import "AppDelegate.h" #include <sys/sysctl.h> #include <mach/mach.h> @implementation ICMemoryHelper //可用内存 +(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; } //已用内存 +(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; } //输出内存 +(void)OutputMemory { DebugLog(@"the memory use now is %f the available %f",[self usedMemory],[self availableMemory]); } @end
调用的时候只要:[ICMemoryHelper OutputMemory];就可以了