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
/// 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
+ (NSString *)getDeviceName {
// 需要#import "sys/utsname.h"
struct utsname systemInfo;
uname(&systemInfo);
NSString *deviceString = [NSStringstringWithCString:systemInfo.machineencoding:NSUTF8StringEncoding];
if ([deviceStringisEqualToString:@"iPhone3,1"])return @"iPhone 4";
if ([deviceStringisEqualToString:@"iPhone3,2"])return @"iPhone 4";
if ([deviceStringisEqualToString:@"iPhone3,3"])return @"iPhone 4";
if ([deviceStringisEqualToString:@"iPhone4,1"])return @"iPhone 4S";
if ([deviceStringisEqualToString:@"iPhone5,1"])return @"iPhone 5";
if ([deviceStringisEqualToString:@"iPhone5,2"])return @"iPhone 5 (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPhone5,3"])return @"iPhone 5c (GSM)";
if ([deviceStringisEqualToString:@"iPhone5,4"])return @"iPhone 5c (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPhone6,1"])return @"iPhone 5s (GSM)";
if ([deviceStringisEqualToString:@"iPhone6,2"])return @"iPhone 5s (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPhone7,1"])return @"iPhone 6 Plus";
if ([deviceStringisEqualToString:@"iPhone7,2"])return @"iPhone 6";
if ([deviceStringisEqualToString:@"iPhone8,1"])return @"iPhone 6s";
if ([deviceStringisEqualToString:@"iPhone8,2"])return @"iPhone 6s Plus";
if ([deviceStringisEqualToString:@"iPhone8,4"])return @"iPhone SE";
if ([deviceStringisEqualToString:@"iPod1,1"])return @"iPod Touch 1G";
if ([deviceStringisEqualToString:@"iPod2,1"])return @"iPod Touch 2G";
if ([deviceStringisEqualToString:@"iPod3,1"])return @"iPod Touch 3G";
if ([deviceStringisEqualToString:@"iPod4,1"])return @"iPod Touch 4G";
if ([deviceStringisEqualToString:@"iPod5,1"])return @"iPod Touch (5 Gen)";
if ([deviceStringisEqualToString:@"iPad1,1"])return @"iPad";
if ([deviceStringisEqualToString:@"iPad1,2"])return @"iPad 3G";
if ([deviceStringisEqualToString:@"iPad2,1"])return @"iPad 2 (WiFi)";
if ([deviceStringisEqualToString:@"iPad2,2"])return @"iPad 2";
if ([deviceStringisEqualToString:@"iPad2,3"])return @"iPad 2 (CDMA)";
if ([deviceStringisEqualToString:@"iPad2,4"])return @"iPad 2";
if ([deviceStringisEqualToString:@"iPad2,5"])return @"iPad Mini (WiFi)";
if ([deviceStringisEqualToString:@"iPad2,6"])return @"iPad Mini";
if ([deviceStringisEqualToString:@"iPad2,7"])return @"iPad Mini (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPad3,1"])return @"iPad 3 (WiFi)";
if ([deviceStringisEqualToString:@"iPad3,2"])return @"iPad 3 (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPad3,3"])return @"iPad 3";
if ([deviceStringisEqualToString:@"iPad3,4"])return @"iPad 4 (WiFi)";
if ([deviceStringisEqualToString:@"iPad3,5"])return @"iPad 4";
if ([deviceStringisEqualToString:@"iPad3,6"])return @"iPad 4 (GSM+CDMA)";
if ([deviceStringisEqualToString:@"iPad4,1"])return @"iPad Air (WiFi)";
if ([deviceStringisEqualToString:@"iPad4,2"])return @"iPad Air (Cellular)";
if ([deviceStringisEqualToString:@"iPad4,4"])return @"iPad Mini 2 (WiFi)";
if ([deviceStringisEqualToString:@"iPad4,5"])return @"iPad Mini 2 (Cellular)";
if ([deviceStringisEqualToString:@"iPad4,6"])return @"iPad Mini 2";
if ([deviceStringisEqualToString:@"iPad4,7"])return @"iPad Mini 3";
if ([deviceStringisEqualToString:@"iPad4,8"])return @"iPad Mini 3";
if ([deviceStringisEqualToString:@"iPad4,9"])return @"iPad Mini 3";
if ([deviceStringisEqualToString:@"iPad5,1"])return @"iPad Mini 4 (WiFi)";
if ([deviceStringisEqualToString:@"iPad5,2"])return @"iPad Mini 4 (LTE)";
if ([deviceStringisEqualToString:@"iPad5,3"])return @"iPad Air 2";
if ([deviceStringisEqualToString:@"iPad5,4"])return @"iPad Air 2";
if ([deviceStringisEqualToString:@"iPad6,3"])return @"iPad Pro 9.7";
if ([deviceStringisEqualToString:@"iPad6,4"])return @"iPad Pro 9.7";
if ([deviceStringisEqualToString:@"iPad6,7"])return @"iPad Pro 12.9";
if ([deviceStringisEqualToString:@"iPad6,8"])return @"iPad Pro 12.9";
if ([deviceStringisEqualToString:@"i386"])return @"Simulator";
if ([deviceStringisEqualToString:@"x86_64"])return @"Simulator";return deviceString;
}
3. 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。
4. 获取app版本号
/// 获取app版本号+ (NSString *)getAPPVerion {
return [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
}
5. 获取电池电量
/// 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
/// 当前系统名称+ (NSString *)getSystemName {
return [UIDevice currentDevice].systemName;
}
7. 获取当前系统版本号
/// 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
/// 通用唯一识别码UUID+ (NSString *)getUUID {
return [[UIDevice currentDevice] identifierForVendor].UUIDString;
}
9. 获取当前设备IP
// 获取当前设备IP+ (NSString *)getDeviceIPAdress {
NSString *address = @"an error occurred when obtaining ip address";
structifaddrs *interfaces = NULL;
structifaddrs *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(((structsockaddr_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
/// 获取总内存大小+ (longlong)getTotalMemorySize {
return [NSProcessInfo processInfo].physicalMemory;
}
11. 获取当前可用内存
/// 获取当前可用内存+ (longlong)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
/// 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([appclass],"_statusBar");
id status = object_getIvar(app, ivar);
for (id aviewin [status subviews]) {
int batteryLevel =0;
for (id bviewin [aview subviews]) {
if ([NSStringFromClass([bviewclass]) caseInsensitiveCompare:@"UIStatusBarBatteryItemView"] ==NSOrderedSame&&[[[UIDevice currentDevice] systemVersion] floatValue] >=6.0) {
Ivar ivar= class_getInstanceVariable([bviewclass],"_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）
/// 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
/// 获取当前语言+ (NSString *)getDeviceLanguage {
NSArray *languageArray = [NSLocale preferredLanguages];
return [languageArray objectAtIndex:0];
}