NSProcessInfo对象是用来获取进程的相关信息，包括进程的参数、PID、进程所在的系统的主机名、操作系统名、操作系统版本等等。(UIDevice获设备信息)
@autoreleasepool {
//创建一个NSProcessInfo对象，表示当前进程
NSProcessInfo *processInfo = [NSProcessInfo processInfo];
//获取运行该进程的参数
NSArray *arr = [processInfo arguments];
NSLog(@"运行该程序的参数为：%@", arr);
//获取该进程的进程标示符
NSLog(@"该程序的进程标示符(PID)为：%d", [processInfo processIdentifier]);
//获取该进程的进程名
NSLog(@"该程序的进程名为：%@", [processInfo processName]);
//设置该进程的新进程名
[processInfo setProcessName:@"test"];
NSLog(@"该程序的新进程名为：%@", [processInfo processName]);
//获取运行该进程的系统的环境变量
NSLog(@"运行该进程的系统的所有环境变量为：%@", [processInfo environment]);
//获取运行该进程的主机名
NSLog(@"运行该进程的主机名为：%@", [processInfo hostName]);
//获取运行该进程的操作系统
NSLog(@"运行该进程所在的操作系统为：%ld", [processInfo operatingSystem]);
//获取运行该进程的操作系统的版本
NSLog(@"运行该进程所在的操作系统名为：%@", [processInfo operatingSystemName]);
//获取运行该进程的操作系统的版本
NSLog(@"运行该进程所在的操作系统的版本为：%@", [processInfo operatingSystemVersionString]);
//获取运行该进程的系统的物理内存
NSLog(@"运行该进程的系统的物理内存为：%lld", [processInfo physicalMemory]);
//获取运行该进程的系统的处理器数量
NSLog(@"运行该进程的系统的处理器数量为：%ld", [processInfo processorCount]);
//获取运行该进程的系统的处于激活状态的处理器数量
NSLog(@"运行该进程的系统的处于激活状态的处理器数量为：%ld", [processInfo activeProcessorCount]);
//获取运行该进程的系统已运行的时间
NSLog(@"运行该进程的系统的已运行时间为：%f", [processInfo systemUptime]);
}
2015-12-17 13:32:27.993 PhotoData[1769:88186] 运行该程序的参数为：(
"/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Containers/Bundle/Application/98DE2D88-1AFB-4BFE-B7F3-BABC6E895073/PhotoData.app/PhotoData"
)
2015-12-17 13:32:27.993 PhotoData[1769:88186] 该程序的进程标示符(PID)为：1769
2015-12-17 13:32:27.993 PhotoData[1769:88186] 该程序的进程名为：PhotoData
2015-12-17 13:32:27.994 PhotoData[1769:88186] 该程序的新进程名为：test
2015-12-17 13:32:27.995 PhotoData[1769:88186] 运行该进程的系统的所有环境变量为：{
"CFFIXED_USER_HOME" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Containers/Data/Application/3BF58ECF-089F-4502-9033-7D9395B0E33A";
"CFLOG_FORCE_STDERR" = YES;
CLASSIC = 2;
"CUPS_SERVER" = "/private/tmp/com.apple.launchd.PTj87fzPPz/Listeners";
"DYLD_FALLBACK_FRAMEWORK_PATH" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/Frameworks";
"DYLD_FALLBACK_LIBRARY_PATH" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib";
"DYLD_FRAMEWORK_PATH" = "/Users/ouka/Library/Developer/Xcode/DerivedData/PhotoData-fwnrcsmyuqwojoatgebsyefqxkkw/Build/Products/Debug-iphonesimulator";
"DYLD_LIBRARY_PATH" = "/Users/ouka/Library/Developer/Xcode/DerivedData/PhotoData-fwnrcsmyuqwojoatgebsyefqxkkw/Build/Products/Debug-iphonesimulator:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/system/introspection";
"DYLD_ROOT_PATH" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk";
"DYLD_SHARED_REGION" = avoid;
FBSClientLogging = 0;
HOME = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Containers/Data/Application/3BF58ECF-089F-4502-9033-7D9395B0E33A";
"IOS_SIMULATOR_SYSLOG_SOCKET" = "/private/tmp/com.apple.CoreSimulator.SimDevice.8286C39C-1B24-4854-AF48-CA68A6B0D182.launchd_sim/syslogsock";
"IPHONE_SHARED_RESOURCES_DIRECTORY" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data";
"IPHONE_SIMULATOR_CLASS" = N71;
"IPHONE_SIMULATOR_DEVICE" = iPhone;
"IPHONE_SIMULATOR_ROOT" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk";
"IPHONE_TVOUT_EXTENDED_PROPERTIES" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Library/Application Support/iPhone Simulator/com.apple.iphonesimulator/extended_display.plist";
NSUnbufferedIO = YES;
PATH = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/bin:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/bin:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/sbin:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/sbin:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/local/bin";
"SIMULATOR_CAPABILITIES" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/CoreSimulator/Profiles/DeviceTypes/iPhone 6s.simdevicetype/Contents/Resources/capabilities.plist";
"SIMULATOR_DEVICE_NAME" = iPhone4Simulator;
"SIMULATOR_EXTENDED_DISPLAY_PROPERTIES" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Library/Application Support/iPhone Simulator/com.apple.iphonesimulator/extended_display.plist";
"SIMULATOR_HOST_HOME" = "/Users/ouka";
"SIMULATOR_LEGACY_ASSET_SUFFIX" = iphone;
"SIMULATOR_LOG_ROOT" = "/Users/ouka/Library/Logs/CoreSimulator/8286C39C-1B24-4854-AF48-CA68A6B0D182";
"SIMULATOR_MAINSCREEN_HEIGHT" = 1334;
"SIMULATOR_MAINSCREEN_PITCH" = "326.000000";
"SIMULATOR_MAINSCREEN_SCALE" = "2.000000";
"SIMULATOR_MAINSCREEN_WIDTH" = 750;
"SIMULATOR_MEMORY_WARNINGS" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/var/run/memory_warning_simulation";
"SIMULATOR_MODEL_IDENTIFIER" = "iPhone8,1";
"SIMULATOR_PLATFORM_RUNTIME_OVERLAY_ROOT" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/CoreSimulator/RuntimeOverlay";
"SIMULATOR_ROOT" = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk";
"SIMULATOR_RUNTIME_BUILD_VERSION" = 13C75;
"SIMULATOR_RUNTIME_VERSION" = "9.2";
"SIMULATOR_SHARED_RESOURCES_DIRECTORY" = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data";
"SIMULATOR_UDID" = "8286C39C-1B24-4854-AF48-CA68A6B0D182";
"SIMULATOR_VERSION_INFO" = "CoreSimulator 201.3 - Device: iPhone 6s - Runtime: iOS 9.2 (13C75) - DeviceType: iPhone 6s";
"TESTMANAGERD_SIM_SOCK" = "/private/tmp/com.apple.launchd.Hd9yxjdGfC/com.apple.testmanagerd.unix-domain.socket";
TMPDIR = "/Users/ouka/Library/Developer/CoreSimulator/Devices/8286C39C-1B24-4854-AF48-CA68A6B0D182/data/Containers/Data/Application/3BF58ECF-089F-4502-9033-7D9395B0E33A/tmp";
"XPC_FLAGS" = 0x0;
"XPC_SERVICE_NAME" = "UIKitApplication:io.objc.PhotoData[0x24c7]";
"XPC_SIMULATOR_LAUNCHD_NAME" = "com.apple.CoreSimulator.SimDevice.8286C39C-1B24-4854-AF48-CA68A6B0D182.launchd_sim";
"__XCODE_BUILT_PRODUCTS_DIR_PATHS" = "/Users/ouka/Library/Developer/Xcode/DerivedData/PhotoData-fwnrcsmyuqwojoatgebsyefqxkkw/Build/Products/Debug-iphonesimulator";
"__XPC_DYLD_FRAMEWORK_PATH" = "/Users/ouka/Library/Developer/Xcode/DerivedData/PhotoData-fwnrcsmyuqwojoatgebsyefqxkkw/Build/Products/Debug-iphonesimulator";
"__XPC_DYLD_LIBRARY_PATH" = "/Users/ouka/Library/Developer/Xcode/DerivedData/PhotoData-fwnrcsmyuqwojoatgebsyefqxkkw/Build/Products/Debug-iphonesimulator";
}
2015-12-17 13:32:28.377 PhotoData[1769:88186] 运行该进程的主机名为：cactus.local
2015-12-17 13:32:28.377 PhotoData[1769:88186] 运行该进程所在的操作系统为：5
2015-12-17 13:32:28.378 PhotoData[1769:88186] 运行该进程所在的操作系统名为：NSMACHOperatingSystem
2015-12-17 13:32:28.382 PhotoData[1769:88186] 运行该进程所在的操作系统的版本为：Version 9.2 (Build 13C75)
2015-12-17 13:32:28.382 PhotoData[1769:88186] 运行该进程的系统的物理内存为：8589934592
2015-12-17 13:32:28.383 PhotoData[1769:88186] 运行该进程的系统的处理器数量为：4
2015-12-17 13:32:28.383 PhotoData[1769:88186] 运行该进程的系统的处于激活状态的处理器数量为：4
2015-12-17 13:32:28.384 PhotoData[1769:88186] 运行该进程的系统的已运行时间为：12109.074797