Fix/maskview crash (#1201)

* fix crash

* feat: ios 3.1.6

---------

Co-authored-by: GY <hishiguangyuan@didiglobal.com>

Author: yFeii

DoraemonKit.podspec

@@ -7,7 +7,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'DoraemonKit'
-  s.version          = '3.1.5'
+  s.version          = '3.1.6'
   s.summary          = 'iOS 各式各样的工具集合'
 
 # This description is used to generate tags and improve search results.

iOS/DoraemonKit/Src/Core/Plugin/Common/H5/QRCode/DoraemonQRScanView.h

@@ -60,7 +60,7 @@ NS_ASSUME_NONNULL_BEGIN
  可自定义的蒙版View，可在上面添加自定义控件,也可以改变背景颜色，透明度
  默认为50%透明度黑色，遮盖区域依赖scanRect,需先指定scanRect，否则为默认
  */
-@property (nonatomic, strong) UIView *maskView;
+@property (nonatomic, strong) UIView *coverView;
 
 /**
  上下移动的扫描线的颜色，默认为橙色

iOS/DoraemonKit/Src/Core/Plugin/Common/H5/QRCode/DoraemonQRScanView.m

@@ -163,7 +163,7 @@ - (BOOL)statusCheck{
 
 - (void)setupViews{
     [self addSubview:self.middleView];
-    [self addSubview:self.maskView];
+    [self addSubview:self.coverView];
     [self.middleView addSubview:self.scanLine];
     if (self.isShowCornerLine) {
         [self addCornerLines];
@@ -326,18 +326,18 @@ - (UIView *)middleView{
     return _middleView;
 }
 
-- (UIView *)maskView{
-    if (!_maskView) {
-        _maskView = [[UIView alloc]initWithFrame:self.bounds];
-        _maskView.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.5];
+- (UIView *)coverView{
+    if (!_coverView) {
+        _coverView = [[UIView alloc]initWithFrame:self.bounds];
+        _coverView.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.5];
         UIBezierPath *fullBezierPath = [UIBezierPath bezierPathWithRect:self.bounds];
         UIBezierPath *scanBezierPath = [UIBezierPath bezierPathWithRect:self.scanRect];
         [fullBezierPath appendPath:[scanBezierPath  bezierPathByReversingPath]];
         CAShapeLayer *shapeLayer = [CAShapeLayer layer];
         shapeLayer.path = fullBezierPath.CGPath;
-        _maskView.layer.mask = shapeLayer;
+        _coverView.layer.mask = shapeLayer;
     }
-    return _maskView;
+    return _coverView;
 }
 
 - (UIView *)scanLine{