Question

如何以编程方式在iOS的后台，CPU和RAM使用中运行活动进程？

Answer 1

代码自我解释：）

#import <mach/mach.h>
#import <mach/mach_host.h>
#import <sys/sysctl.h>
- (NSArray *)runningProcesses {

    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0};
    size_t miblen = 4;

    size_t size;
    int st = sysctl(mib, miblen, NULL, &size, NULL, 0);

    struct kinfo_proc * process = NULL;
    struct kinfo_proc * newprocess = NULL;

    do {

        size += size / 10;
        newprocess = realloc(process, size);

        if (!newprocess){

            if (process){
                free(process);
            }

            return nil;
        }

        process = newprocess;
        st = sysctl(mib, miblen, process, &size, NULL, 0);

    } while (st == -1 && errno == ENOMEM);

    if (st == 0){

        if (size % sizeof(struct kinfo_proc) == 0){
            int nprocess = size / sizeof(struct kinfo_proc);

            if (nprocess){

                NSMutableArray * array = [[NSMutableArray alloc] init];

                for (int i = nprocess - 1; i >= 0; i--){

                    NSString * processID = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pid];
                    NSString * processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];

                    NSDictionary * dict = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:processID, processName, nil]
                                                                        forKeys:[NSArray arrayWithObjects:@"ProcessID", @"ProcessName", nil]];
                    [array addObject:dict];
                }

                free(process);
                return array;
            }
        }
    }

    return nil;
}

Answer 2

在此处检索了CPU使用情况：iOS - Get CPU usage from application

RAM的使用似乎在这里得到解决：Available memory for iPhone OS app

编辑：

就像EricS在评论中指出的那样，似乎有办法获得后台任务：Can we retrieve the applications currently running in iPhone and iPad和How to get information about free memory and running processes in an App Store approved app? (Yes, there is one!)

如何在iOS中运行活动进程

2 个答案: