初始化项目

lib/common/util/FitTool.dart

@@ -0,0 +1,43 @@
+
+
+class FitTool {
+  static double rpx = 0;
+  static bool isInit = false;
+  static init(double v) {
+    if (v < 1) {
+      return;
+    }
+    if (isInit == false) {
+      isInit = true;
+      rpx = v / 750.0;
+    }
+  }
+
+  static double getPx(double size) {
+    return rpx * size * 2.0;
+  }
+
+  static double getRpx(double size) {
+    return rpx * size;
+  }
+}
+
+extension FitInt on int {
+  double get px {
+    return FitTool.getPx(this.toDouble());
+  }
+
+  double get rpx {
+    return FitTool.getRpx(this.toDouble());
+  }
+}
+
+extension FitDouble on double {
+  double get px {
+    return FitTool.getPx(this);
+  }
+
+  double get rpx {
+    return FitTool.getRpx(this);
+  }
+}