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
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
}
基本上和这个想法一样https://stackoverflow.com/a/19903595/1937908但更健壮:
#ifndef func_i_system_version_field
#define func_i_system_version_field
inline static int i_system_version_field(unsigned int fieldIndex) {
NSString* const versionString = UIDevice.currentDevice.systemVersion;
NSArray<NSString*>* const versionFields = [versionString componentsSeparatedByString:@"."];
if (fieldIndex < versionFields.count) {
NSString* const field = versionFields[fieldIndex];
return field.intValue;
}
NSLog(@"[WARNING] i_system_version(%iu): field index not present in version string '%@'.", fieldIndex, versionString);
return -1; // error indicator
}
#endif
只需将上面的代码放在一个头文件中。
用法:
int major = i_system_version_field(0);
int minor = i_system_version_field(1);
int patch = i_system_version_field(2);
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)
}
}
#define _kisiOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
if (_kisiOS7) {
NSLog(@"iOS7 or greater")
}
else {
NSLog(@"Less than iOS7");
}
Try:
NSComparisonResult order = [[UIDevice currentDevice].systemVersion compare: @"3.1.3" options: NSNumericSearch];
if (order == NSOrderedSame || order == NSOrderedDescending) {
// OS version >= 3.1.3
} else {
// OS version < 3.1.3
}