方法私有免得后续调用到，以及增加注释

galaxy/galaxy/Classes/Base/C/YHBaseViewModel.swift

@@ -186,7 +186,7 @@ class YHBaseViewModel {
     }
     
     // 获取公链URL
-    func getCurrentPublicImageUrl(_ url: String, _ isPublic: Bool = false, callBackBlock: @escaping (_ success: String?, _ error: YHErrorModel?) -> Void) {
+    private func getCurrentPublicImageUrl(_ url: String, _ isPublic: Bool = false, callBackBlock: @escaping (_ success: String?, _ error: YHErrorModel?) -> Void) {
         if YHNetworkStatusManager.shared.isNetWorkOK == false {
             DispatchQueue.main.async {
                 YHHUD.flash(message: "网络不可用，请检查网络设置")
@@ -206,7 +206,7 @@ class YHBaseViewModel {
         }
     }
 
-    // 获取公链URL
+    // 获取公链URL，后续用getRealUsefulUrl，前期的调用默认中转到getRealUsefulUrl
     func getPublicImageUrl(_ url: String, _ isPublic: Bool = false, callBackBlock: @escaping (_ success: String?, _ error: YHErrorModel?) -> Void) {
         getRealUsefulUrl(url) { str in
             if str.count > 0 {