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
获取屏幕宽度与高度 /// 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。
获取设备版本号 + (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; }
获取iPhone名称 /// 获取iPhone名称 + (NSString *)getiPhoneName { return [UIDevice currentDevice].name; } 获取的是你 iPhone 的名字。
/// 获取app版本号 + (NSString *)getAPPVerion { return [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]; }
/// 获取电池电量 + (CGFloat)getBatteryLevel { return [UIDevice currentDevice].batteryLevel; }
/// 当前系统名称 + (NSString *)getSystemName { return [UIDevice currentDevice].systemName; }
/// 当前系统版本号 + (NSString *)getSystemVersion { return [UIDevice currentDevice].systemVersion; }
/// 通用唯一识别码UUID + (NSString *)getUUID { return [[UIDevice currentDevice] identifierForVendor].UUIDString; }
// 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; }
/// 获取总内存大小 + (long long)getTotalMemorySize { return [NSProcessInfo processInfo].physicalMemory; }
/// 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)); }
/// 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。
/// 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; }
/// 获取当前语言 + (NSString *)getDeviceLanguage { NSArray *languageArray = [NSLocale preferredLanguages]; return [languageArray objectAtIndex:0]; }