我想检查设备的iOS版本是否大于3.1.3 我尝试了以下方法:
[[UIDevice currentDevice].systemVersion floatValue]
但是不管用,我只想要一个:
if (version > 3.1.3) { }
我怎样才能做到这一点呢?
我想检查设备的iOS版本是否大于3.1.3 我尝试了以下方法:
[[UIDevice currentDevice].systemVersion floatValue]
但是不管用,我只想要一个:
if (version > 3.1.3) { }
我怎样才能做到这一点呢?
当前回答
有7.0或6.0.3这样的版本,所以我们可以简单地将版本转换为数字进行比较。如果版本类似于7.0,只需追加另一个”。0”,然后取它的数值。
int version;
NSString* iosVersion=[[UIDevice currentDevice] systemVersion];
NSArray* components=[iosVersion componentsSeparatedByString:@"."];
if ([components count]==2) {
iosVersion=[NSString stringWithFormat:@"%@.0",iosVersion];
}
iosVersion=[iosVersion stringByReplacingOccurrencesOfString:@"." withString:@""];
version=[iosVersion integerValue];
为0
if (version==600) {
// Do something
}
为7.0
if (version==700) {
// Do something
}
其他回答
虽然有点晚了,但鉴于iOS 8.0的存在,这可能是相关的:
如果可以避免使用
[[UIDevice目前]系统版本]
相反,检查是否存在方法/类/其他任何东西。
if ([self.yourClassInstance respondsToSelector:@selector(<yourMethod>)])
{
//do stuff
}
我发现它对位置管理器很有用,我必须调用requestWhenInUseAuthorization for iOS 8.0,但该方法不适用于iOS < 8
以下是一个简短的版本:
struct iOSVersion {
static let SYS_VERSION_FLOAT = (UIDevice.currentDevice().systemVersion as NSString).floatValue
static let iOS7 = (Version.SYS_VERSION_FLOAT < 8.0 && Version.SYS_VERSION_FLOAT >= 7.0)
static let iOS8 = (Version.SYS_VERSION_FLOAT >= 8.0 && Version.SYS_VERSION_FLOAT < 9.0)
static let iOS9 = (Version.SYS_VERSION_FLOAT >= 9.0 && Version.SYS_VERSION_FLOAT < 10.0)
}
用法:
if iOSVersion.iOS8 {
//Do iOS8 code here
}
+(BOOL)doesSystemVersionMeetRequirement:(NSString *)minRequirement{
// eg NSString *reqSysVer = @"4.0";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
if ([currSysVer compare:minRequirement options:NSNumericSearch] != NSOrderedAscending)
{
return YES;
}else{
return NO;
}
}
在您的项目中添加以下Swift代码,并轻松访问iOS版本和设备等信息。
class DeviceInfo: NSObject {
struct ScreenSize
{
static let SCREEN_WIDTH = UIScreen.main.bounds.size.width
static let SCREEN_HEIGHT = UIScreen.main.bounds.size.height
static let SCREEN_MAX_LENGTH = max(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)
static let SCREEN_MIN_LENGTH = min(ScreenSize.SCREEN_WIDTH, ScreenSize.SCREEN_HEIGHT)
}
struct DeviceType
{
static let IS_IPHONE_4_OR_LESS = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH < 568.0
static let IS_IPHONE_5 = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 568.0
static let IS_IPHONE_6 = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH >= 667.0
static let IS_IPHONE_6P = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 736.0
static let IS_IPHONE_X = UIDevice.current.userInterfaceIdiom == .phone && ScreenSize.SCREEN_MAX_LENGTH == 812.0
static let IS_IPAD = UIDevice.current.userInterfaceIdiom == .pad && ScreenSize.SCREEN_MAX_LENGTH == 1024.0
static let IS_IPAD_PRO = UIDevice.current.userInterfaceIdiom == .pad && ScreenSize.SCREEN_MAX_LENGTH == 1366.0
}
struct VersionType{
static let SYS_VERSION_FLOAT = (UIDevice.current.systemVersion as NSString).floatValue
static let iOS7 = (VersionType.SYS_VERSION_FLOAT < 8.0 && VersionType.SYS_VERSION_FLOAT >= 7.0)
static let iOS8 = (VersionType.SYS_VERSION_FLOAT >= 8.0 && VersionType.SYS_VERSION_FLOAT < 9.0)
static let iOS9 = (VersionType.SYS_VERSION_FLOAT >= 9.0 && VersionType.SYS_VERSION_FLOAT < 10.0)
static let iOS10 = (VersionType.SYS_VERSION_FLOAT >= 9.0 && VersionType.SYS_VERSION_FLOAT < 11.0)
}
}
float deviceOSVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
float versionToBeCompared = 3.1.3; //(For Example in your case)
if(deviceOSVersion < versionToBeCompared)
//Do whatever you need to do. Device version is lesser than 3.1.3(in your case)
else
//Device version should be either equal to the version you specified or above