有誰知道如何獲取應(yīng)用程序的CPU使用率？絕對有可能，因?yàn)閼?yīng)用商店中有一些可以顯示它的應(yīng)用程序（Activity Monitor Touch）。
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TA貢獻(xiàn)1829條經(jīng)驗(yàn) 獲得超13個(gè)贊
嘗試這個(gè)：
- (NSString *)cpuUsage
{
kern_return_t kr;
task_info_data_t tinfo;
mach_msg_type_number_t task_info_count;
task_info_count = TASK_INFO_MAX;
kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)tinfo, &task_info_count);
if (kr != KERN_SUCCESS)
{
return @"NA";
}
task_basic_info_t basic_info;
thread_array_t thread_list;
mach_msg_type_number_t thread_count;
thread_info_data_t thinfo;
mach_msg_type_number_t thread_info_count;
thread_basic_info_t basic_info_th;
uint32_t stat_thread = 0; // Mach threads
basic_info = (task_basic_info_t)tinfo;
// get threads in the task
kr = task_threads(mach_task_self(), &thread_list, &thread_count);
if (kr != KERN_SUCCESS)
{
return @"NA";
}
if (thread_count > 0)
stat_thread += thread_count;
long tot_idle = 0;
long tot_user = 0;
long tot_kernel = 0;
int j;
for (j = 0; j < thread_count; j++)
{
thread_info_count = THREAD_INFO_MAX;
kr = thread_info(thread_list[j], THREAD_BASIC_INFO,
(thread_info_t)thinfo, &thread_info_count);
if (kr != KERN_SUCCESS)
{
return nil;
}
basic_info_th = (thread_basic_info_t)thinfo;
if (basic_info_th->flags & TH_FLAGS_IDLE)
{
//This is idle
tot_idle = tot_idle + basic_info_th->user_time.microseconds + basic_info_th->system_time.microseconds;
} else {
//This is user
tot_user = tot_user + basic_info_th->user_time.microseconds;
//This is kernel
tot_kernel = tot_kernel + basic_info_th->system_time.microseconds;
}
} // for each thread
kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t));
assert(kr == KERN_SUCCESS);
long tot_cpu = tot_idle + tot_user + tot_kernel
return [NSString stringWithFormat:@"Idle: %.2f, User: %.2f, Kernel: %.2f", tot_idle/tot_cpu, tot_user/tot_cpu, tot_kernel/tot_cpu];
}
但是，該方法會(huì)根據(jù)每個(gè)過程的起點(diǎn)來計(jì)算百分比。如果您正在尋找更傳統(tǒng)的方法來計(jì)算這些數(shù)字
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