http://www.cocoachina.com/ios/20170807/20149.html
一、目录结构:
获取屏幕宽度与高度
获取设备版本号
获取iPhone名称
获取app版本号
获取电池电量
获取当前系统名称
获取当前系统版本号
获取通用的唯一识别码UUID
获取当前设备IP
获取总内存大小
获取当前可用内存
获取精准电池电量
获取电池当前的状态（共有4种状态）
获取设备当前的语言
二、具体内容
1. 获取屏幕宽度与高度
1 2 3 4 5 6 7 8 /// 屏幕宽度 + (CGFloat)getDeviceScreenWidth { return [UIScreen mainScreen].bounds.size.width; } /// 屏幕高度 + (CGFloat)getDeviceScreenHeight { return [UIScreen mainScreen].bounds.size.height; }[UIScreen mainScreen].bounds.size.width用的很普遍，一般来说定义成宏更好，然后根据屏幕宽高进行尺寸的适配。
2. 获取设备版本号
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 + (NSString *)getDeviceName { // 需要#import "sys/utsname.h" struct utsname systemInfo; uname(&systemInfo); NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding]; if ([deviceString isEqualToString:@ "iPhone3,1" ]) return @ "iPhone 4" ; if ([deviceString isEqualToString:@ "iPhone3,2" ]) return @ "iPhone 4" ; if ([deviceString isEqualToString:@ "iPhone3,3" ]) return @ "iPhone 4" ; if ([deviceString isEqualToString:@ "iPhone4,1" ]) return @ "iPhone 4S" ; if ([deviceString isEqualToString:@ "iPhone5,1" ]) return @ "iPhone 5" ; if ([deviceString isEqualToString:@ "iPhone5,2" ]) return @ "iPhone 5 (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPhone5,3" ]) return @ "iPhone 5c (GSM)" ; if ([deviceString isEqualToString:@ "iPhone5,4" ]) return @ "iPhone 5c (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPhone6,1" ]) return @ "iPhone 5s (GSM)" ; if ([deviceString isEqualToString:@ "iPhone6,2" ]) return @ "iPhone 5s (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPhone7,1" ]) return @ "iPhone 6 Plus" ; if ([deviceString isEqualToString:@ "iPhone7,2" ]) return @ "iPhone 6" ; if ([deviceString isEqualToString:@ "iPhone8,1" ]) return @ "iPhone 6s" ; if ([deviceString isEqualToString:@ "iPhone8,2" ]) return @ "iPhone 6s Plus" ; if ([deviceString isEqualToString:@ "iPhone8,4" ]) return @ "iPhone SE" ; if ([deviceString isEqualToString:@ "iPod1,1" ]) return @ "iPod Touch 1G" ; if ([deviceString isEqualToString:@ "iPod2,1" ]) return @ "iPod Touch 2G" ; if ([deviceString isEqualToString:@ "iPod3,1" ]) return @ "iPod Touch 3G" ; if ([deviceString isEqualToString:@ "iPod4,1" ]) return @ "iPod Touch 4G" ; if ([deviceString isEqualToString:@ "iPod5,1" ]) return @ "iPod Touch (5 Gen)" ; if ([deviceString isEqualToString:@ "iPad1,1" ]) return @ "iPad" ; if ([deviceString isEqualToString:@ "iPad1,2" ]) return @ "iPad 3G" ; if ([deviceString isEqualToString:@ "iPad2,1" ]) return @ "iPad 2 (WiFi)" ; if ([deviceString isEqualToString:@ "iPad2,2" ]) return @ "iPad 2" ; if ([deviceString isEqualToString:@ "iPad2,3" ]) return @ "iPad 2 (CDMA)" ; if ([deviceString isEqualToString:@ "iPad2,4" ]) return @ "iPad 2" ; if ([deviceString isEqualToString:@ "iPad2,5" ]) return @ "iPad Mini (WiFi)" ; if ([deviceString isEqualToString:@ "iPad2,6" ]) return @ "iPad Mini" ; if ([deviceString isEqualToString:@ "iPad2,7" ]) return @ "iPad Mini (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPad3,1" ]) return @ "iPad 3 (WiFi)" ; if ([deviceString isEqualToString:@ "iPad3,2" ]) return @ "iPad 3 (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPad3,3" ]) return @ "iPad 3" ; if ([deviceString isEqualToString:@ "iPad3,4" ]) return @ "iPad 4 (WiFi)" ; if ([deviceString isEqualToString:@ "iPad3,5" ]) return @ "iPad 4" ; if ([deviceString isEqualToString:@ "iPad3,6" ]) return @ "iPad 4 (GSM+CDMA)" ; if ([deviceString isEqualToString:@ "iPad4,1" ]) return @ "iPad Air (WiFi)" ; if ([deviceString isEqualToString:@ "iPad4,2" ]) return @ "iPad Air (Cellular)" ; if ([deviceString isEqualToString:@ "iPad4,4" ]) return @ "iPad Mini 2 (WiFi)" ; if ([deviceString isEqualToString:@ "iPad4,5" ]) return @ "iPad Mini 2 (Cellular)" ; if ([deviceString isEqualToString:@ "iPad4,6" ]) return @ "iPad Mini 2" ; if ([deviceString isEqualToString:@ "iPad4,7" ]) return @ "iPad Mini 3" ; if ([deviceString isEqualToString:@ "iPad4,8" ]) return @ "iPad Mini 3" ; if ([deviceString isEqualToString:@ "iPad4,9" ]) return @ "iPad Mini 3" ; if ([deviceString isEqualToString:@ "iPad5,1" ]) return @ "iPad Mini 4 (WiFi)" ; if ([deviceString isEqualToString:@ "iPad5,2" ]) return @ "iPad Mini 4 (LTE)" ; if ([deviceString isEqualToString:@ "iPad5,3" ]) return @ "iPad Air 2" ; if ([deviceString isEqualToString:@ "iPad5,4" ]) return @ "iPad Air 2" ; if ([deviceString isEqualToString:@ "iPad6,3" ]) return @ "iPad Pro 9.7" ; if ([deviceString isEqualToString:@ "iPad6,4" ]) return @ "iPad Pro 9.7" ; if ([deviceString isEqualToString:@ "iPad6,7" ]) return @ "iPad Pro 12.9" ; if ([deviceString isEqualToString:@ "iPad6,8" ]) return @ "iPad Pro 12.9" ; if ([deviceString isEqualToString:@ "i386" ]) return @ "Simulator" ; if ([deviceString isEqualToString:@ "x86_64" ]) return @ "Simulator" ; return deviceString; }3. 获取iPhone名称
1 2 3 4 /// 获取iPhone名称 + (NSString *)getiPhoneName { return [UIDevice currentDevice].name; }获取的是你 iPhone 的名字。
4. 获取app版本号
1 2 3 4 /// 获取app版本号 + (NSString *)getAPPVerion { return [[[NSBundle mainBundle] infoDictionary] objectForKey:@ "CFBundleShortVersionString" ]; }5. 获取电池电量
1 2 3 4 /// 获取电池电量 + (CGFloat)getBatteryLevel { return [UIDevice currentDevice].batteryLevel; }这个方法获取电池电量不是很精确，下边会介绍一个获取精确电池电量的。
6. 获取当前系统名称
1 2 3 4 /// 当前系统名称 + (NSString *)getSystemName { return [UIDevice currentDevice].systemName; }7. 获取当前系统版本号
1 2 3 4 /// 当前系统版本号 + (NSString *)getSystemVersion { return [UIDevice currentDevice].systemVersion; }8. 获取通用的唯一识别码UUID
1 2 3 4 /// 通用唯一识别码UUID + (NSString *)getUUID { return [[UIDevice currentDevice] identifierForVendor].UUIDString; }9. 获取当前设备IP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 // 获取当前设备IP + (NSString *)getDeviceIPAdress { NSString *address = @ "an error occurred when obtaining ip address" ; struct ifaddrs *interfaces = NULL; struct ifaddrs *temp_addr = NULL; int success = 0; success = getifaddrs(&interfaces); if (success == 0) { // 0 表示获取成功 temp_addr = interfaces; while (temp_addr != NULL) { if ( temp_addr->ifa_addr->sa_family == AF_INET) { // Check if interface is en0 which is the wifi connection on the iPhone if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@ "en0" ]) { // Get NSString from C String address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)]; } } temp_addr = temp_addr->ifa_next; } } freeifaddrs(interfaces); return address; }10. 获取总内存大小
1 2 3 4 /// 获取总内存大小 + (long long)getTotalMemorySize { return [NSProcessInfo processInfo].physicalMemory; }11. 获取当前可用内存
1 2 3 4 5 6 7 8 9 10 11 /// 获取当前可用内存 + (long long)getAvailableMemorySize { 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 + vm_page_size * vmStats.inactive_count)); }12. 获取精准电池电量
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 /// 获取精准电池电量 + (CGFloat)getCurrentBatteryLevel { UIApplication *app = [UIApplication sharedApplication]; if (app.applicationState == UIApplicationStateActive||app.applicationState==UIApplicationStateInactive) { Ivar ivar= class_getInstanceVariable([app class], "_statusBar" ); id status = object_getIvar(app, ivar); for (id aview in [status subviews]) { int batteryLevel = 0; for (id bview in [aview subviews]) { if ([NSStringFromClass([bview class]) caseInsensitiveCompare:@ "UIStatusBarBatteryItemView" ] == NSOrderedSame&&[[[UIDevice currentDevice] systemVersion] floatValue] >=6.0) { Ivar ivar= class_getInstanceVariable([bview class], "_capacity" ); if (ivar) { batteryLevel = ((int (*)(id, Ivar))object_getIvar)(bview, ivar); if (batteryLevel > 0 && batteryLevel <= 100) { return batteryLevel; } else { return 0; } } } } } } return 0; }上面这个方法是通过 runtime 获取电池电量控件类私有变量的值，较为精确。
13. 获取电池当前的状态（共有4种状态）
1 2 3 4 5 6 7 8 9 10 11 12 13 14 /// 获取电池当前的状态，共有4种状态 + (NSString *) getBatteryState { UIDevice *device = [UIDevice currentDevice]; if (device.batteryState == UIDeviceBatteryStateUnknown) { return @ "UnKnow" ; } else if (device.batteryState == UIDeviceBatteryStateUnplugged){ return @ "Unplugged" ; } else if (device.batteryState == UIDeviceBatteryStateCharging){ return @ "Charging" ; } else if (device.batteryState == UIDeviceBatteryStateFull){ return @ "Full" ; } return nil; }14. 获取设备当前的语言
1 2 3 4 5 /// 获取当前语言 + (NSString *)getDeviceLanguage { NSArray *languageArray = [NSLocale preferredLanguages]; return [languageArray objectAtIndex:0]; }提示：上面代码如果直接复制的话有些会报错，这是因为需要导入头文件，详细代码请点击 iOS 获取设备的各种信息。
