shouldUpdate生命周期

7 years ago · 4e4066bedd
2 changed files with 10 additions and 0 deletions
--- a/demo/js/core/abstract/demo.virtual_group.js
+++ b/demo/js/core/abstract/demo.virtual_group.js
@ -89,6 +89,11 @@ Demo.Item = BI.inherit(BI.Widget, {
        }
    },

+    shouldUpdate: function (nextProps) {
+        var o = this.options;
+        return o.type !== nextProps.type || o.key !== nextProps.key || o.value !== nextProps.value;
+    },
+
    update: function (item) {
        this.label.setText(item.value);
        console.log("更新了一项");
--- a/dist/demo.js
+++ b/dist/demo.js
@ -7561,6 +7561,11 @@ Demo.Item = BI.inherit(BI.Widget, {
        }
    },

+    shouldUpdate: function (nextProps) {
+        var o = this.options;
+        return o.type !== nextProps.type || o.key !== nextProps.key || o.value !== nextProps.value;
+    },
+
    update: function (item) {
        this.label.setText(item.value);
        console.log("更新了一项");