NSDictionary *infoDict = [[NSBundle mainBundle] infoDictionary];
NSString*vison = infoDict[@"CFBundleVersion"];
// NSString *vison = @"1.2.5";
NSString*vison2 =@"1.1.4";
if ([vison compare:vison2 options:NSNumericSearch] == NSOrderedDescending){
NSLog(@"%@ is bigger",vison);
}else{
NSLog(@"%@ is bigger",vison2);
}
