增加ifClearAllInBeginEditing

Example/CRBoxInputView/CRDetailViewController.m

@@ -416,6 +416,7 @@
         }
     };
     
+    _boxInputView.ifClearAllInBeginEditing = YES;
     [_boxInputView reloadInputString:@"5678"];
     
     return _boxInputView;

PodCode/Classes/CRBoxInputView.h

@@ -76,6 +76,13 @@ typedef void(^TextEditStatusChangeblock)(CRTextEditStatus editStatus);
  */
 @property (strong, nonatomic) NSString  * _Nullable placeholderText;
 
+/**
+ 弹出键盘时，是否清空所有输入
+ 只有在输入的字数等于codeLength时，生效
+ default: NO
+ */
+@property (assign, nonatomic) BOOL ifClearAllInBeginEditing;
+
 @property (copy, nonatomic) TextDidChangeblock _Nullable textDidChangeblock;
 @property (copy, nonatomic) TextEditStatusChangeblock _Nullable textEditStatusChangeblock;
 @property (strong, nonatomic) CRBoxFlowLayout * _Nullable boxFlowLayout;

PodCode/Classes/CRBoxInputView.m

@@ -159,6 +159,10 @@ typedef NS_ENUM(NSInteger, CRBoxTextChangeType) {
 {
     _ifNeedBeginEdit = YES;
     
+    if (self.ifClearAllInBeginEditing && self.textValue.length == self.codeLength) {
+        [self clearAll];
+    }
+    
     if (self.textEditStatusChangeblock) {
         self.textEditStatusChangeblock(CRTextEditStatus_BeginEdit);
     }