首先导入
#import <sys/sysctl.h>
#import <mach/mach.h>
///内存
- (int64_t)memoryUsage {
int64_t memoryUsageInByte = 0;
task_vm_info_data_t vmInfo;
mach_msg_type_number_t count = TASK_VM_INFO_COUNT;
kern_return_t kernelReturn = task_info(mach_task_self(), TASK_VM_INFO, (task_info_t) &vmInfo, &count);
if(kernelReturn == KERN_SUCCESS) {
memoryUsageInByte = (int64_t) vmInfo.phys_footprint;
NSLog(@"Memory in use (in bytes): %lld", memoryUsageInByte);
} else {
NSLog(@"Error with task_info(): %s", mach_error_string(kernelReturn));
}
return memoryUsageInByte;
}
//CPU占用
- (double)getCpuUsage {
kern_return_t kr;
thread_array_t threadList; // 保存当前Mach task的线程列表
mach_msg_type_number_t threadCount; // 保存当前Mach task的线程个数
thread_info_data_t threadInfo; // 保存单个线程的信息列表
mach_msg_type_number_t threadInfoCount; // 保存当前线程的信息列表大小
thread_basic_info_t threadBasicInfo; // 线程的基本信息
// 通过“task_threads”API调用获取指定 task 的线程列表
// mach_task_self_，表示获取当前的 Mach task
kr = task_threads(mach_task_self(), &threadList, &threadCount);
if (kr != KERN_SUCCESS) {
return -1;
}
double cpuUsage = 0;
for (int i = 0; i < threadCount; i++) {
threadInfoCount = THREAD_INFO_MAX;
// 通过“thread_info”API调用来查询指定线程的信息
// flavor参数传的是THREAD_BASIC_INFO，使用这个类型会返回线程的基本信息，
// 定义在 thread_basic_info_t 结构体，包含了用户和系统的运行时间、运行状态和调度优先级等
kr = thread_info(threadList[i], THREAD_BASIC_INFO, (thread_info_t)threadInfo, &threadInfoCount);
if (kr != KERN_SUCCESS) {
return -1;
}
threadBasicInfo = (thread_basic_info_t)threadInfo;
if (!(threadBasicInfo->flags & TH_FLAGS_IDLE)) {
cpuUsage += threadBasicInfo->cpu_usage;
}
}
// 回收内存，防止内存泄漏
vm_deallocate(mach_task_self(), (vm_offset_t)threadList, threadCount * sizeof(thread_t));
return cpuUsage / (double)TH_USAGE_SCALE * 100.0;
}
- (void)logConfig{
NSLog(@"系统是：%@", [[UIDevice currentDevice] systemVersion]);
NSLog(@"开始检测内存占用");
NSLog(@"CPU占用是：%.1f%%", [self getCpuUsage]);
NSLog(@"占用内存是：%.1fM", [self memoryUsage] / 1024.0 / 1024.0);
NSLog(@"结束");
}
以上是实现方式，和调用。
想看原理：https://www.jianshu.com/p/95df83780c8f
