add files apis

GIGA/Common/BaseVC/GiGaBaseNavViewController.m

@@ -36,12 +36,13 @@
     if (self.viewControllers.count > 1 ) {
         //自定义返回按钮
         UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
-        [backBtn setImage:[UIImage imageNamed:@""] forState:UIControlStateNormal];
-        backBtn.backgroundColor = [UIColor redColor];
+        backBtn.frame = CGRectMake(0, 0, 40, 40);
+        [backBtn setImage:[UIImage imageNamed:@"btn_moment_back"] forState:UIControlStateNormal];
+        [backBtn setImageEdgeInsets:UIEdgeInsetsMake(0,-14, 0, 14)];
+        //backBtn.backgroundColor = [UIColor redColor];
         [backBtn addTarget:self action:@selector(backItemAction) forControlEvents:UIControlEventTouchUpInside];
         UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];
         viewController.navigationItem.leftBarButtonItem = backItem;
-        
     }
 }
 
@@ -55,14 +56,4 @@
     // Dispose of any resources that can be recreated.
 }
 
-/*
-#pragma mark - Navigation
-
-// In a storyboard-based application, you will often want to do a little preparation before navigation
-- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
-    // Get the new view controller using [segue destinationViewController].
-    // Pass the selected object to the new view controller.
-}
-*/
-
 @end