fix issue gogf#1750

Author: gqcn

util/gconv/gconv.go

@@ -264,14 +264,18 @@ func checkJsonAndUnmarshalUseNumber(any interface{}, target interface{}) bool {
 	switch r := any.(type) {
 	case []byte:
 		if json.Valid(r) {
-			_ = json.UnmarshalUseNumber(r, &target)
+			if err := json.UnmarshalUseNumber(r, &target); err != nil {
+				return false
+			}
 			return true
 		}
 
 	case string:
 		anyAsBytes := []byte(r)
 		if json.Valid(anyAsBytes) {
-			_ = json.UnmarshalUseNumber(anyAsBytes, &target)
+			if err := json.UnmarshalUseNumber(anyAsBytes, &target); err != nil {
+				return false
+			}
 			return true
 		}
 	}

util/gconv/gconv_z_unit_slice_test.go

@@ -103,6 +103,10 @@ func Test_Strings(t *testing.T) {
 		}
 		t.AssertEQ(gconv.Strings(array), []string{"1", "2", "3"})
 	})
+	// https://github.com/gogf/gf/issues/1750
+	gtest.C(t, func(t *gtest.T) {
+		t.AssertEQ(gconv.Strings("123"), []string{"123"})
+	})
 }
 
 func Test_Slice_Interfaces(t *testing.T) {