版本号对比方案及参考代码(Objective-C,Java,JavaScript)

判断aVersion是否大于bVersion
例子 :
A.
NSString *aVersion = @"2.4.2";
NSString *bVersion = @"2.3.5";
[self compareVersion:aVersion biggerThan:bVersion] 为true

B.
NSString *aVersion = @"2.3.5";
NSString *bVersion = @"2.3.5";
[self compareVersion:aVersion biggerThan:bVersion] 为false

C.
NSString *aVersion = @"0.13.5";
NSString *bVersion = @"2.3.5";
[self compareVersion:aVersion biggerThan:bVersion] 为false

D.判断A版本号 不小于 B版本号
NSString *aVersion = @"2.0.0";
NSString *bVersion = @"2.3.5";  //为当前版本号
(![self compareVersion:aVersion biggerThan:bVersion]) 为true 


+ (BOOL)compareVersion:(NSString *)aVersion biggerThan:(NSString *)bVersion{
    NSArray<NSString *> *aArray = [aVersion componentsSeparatedByString:@"."];
    NSArray<NSString *> *bArray = [bVersion componentsSeparatedByString:@"."];
    NSUInteger loopCount = MIN(aArray.count,bArray.count);
    for (int i = 0; i < loopCount; i++) {
        if (aArray[i].integerValue > bArray[i].integerValue){
            return YES;
        }else if (aArray[i].integerValue < bArray[i].integerValue){
            return NO;
        }
    }
    return aArray.count > bArray.count;
}

判断aVersion是否大于bVersion
例子 :
A.
String aVersion = @"2.4.2";
String bVersion = @"2.3.5";
compareAppVersion(aVersion,bVersion) ;//为true

B.
String aVersion = @"2.3.5";
String bVersion = @"2.3.5";
compareAppVersion(aVersion,bVersion) ;//false

C.
String aVersion = @"0.13.5";
String bVersion = @"2.3.5";
compareAppVersion(aVersion,bVersion) ;//false

D.判断A版本号 不小于 B版本号
String aVersion = @"2.0.0";
String bVersion = @"2.3.5";  //为当前版本号
(!compareAppVersion(aVersion,bVersion)) 为true 


protected boolean compareAppVersion(String aVersion,String bVersion){
    String a = (aVersion != null ? aVersion : "");
    String b = (bVersion != null ? bVersion : "");
    List<String> aStringArray = Arrays.asList(a.split("\\."));
    List<String> bStringArray = Arrays.asList(b.split("\\."));
    int loopCount = Math.min(aStringArray.size(), bStringArray.size());
    for (int i = 0; i < loopCount; i++){
        try{
            if (Integer.parseInt(aStringArray.get(i)) > Integer.parseInt(bStringArray.get(i))){
                return true;
            }
            else if (Integer.parseInt(aStringArray.get(i)) < Integer.parseInt(bStringArray.get(i))){
                return false;
            }
        }
        catch (Exception e) {
            //logger.warn("compareAppVersion版本比较错误"+e.getMessage());
            // TODO: handle exception
        }
    }
    return aStringArray.size() > bStringArray.size();
}

----- JavaScript ------
判断方式请参考Java
function compareVersion(aVersion,bVersion){
    var a = (aVersion != null ? aVersion : "");
    var b = (bVersion != null ? bVersion : "");
    var aStringArray = a.split(".");
    var bStringArray = b.split(".");
    var loopCount = Math.min(aStringArray.length, bStringArray.length);
    for (var i = 0; i < loopCount; i++){
            if (parseInt(aStringArray[i]) > parseInt(bStringArray[i])){
                return true;
            }
            else if (parseInt(aStringArray[i]) < parseInt(bStringArray[i])){
                return false;
            }    
    }
    return aStringArray.length > bStringArray.length;
}