feat:add Popover and supoort headViews for iOS

iOS/Pod/Classes/Plugin/DoricPopoverPlugin.h

@@ -0,0 +1,9 @@
+//
+// Created by pengfei.zhou on 2019/11/28.
+//
+
+#import <Foundation/Foundation.h>
+#import "DoricNativePlugin.h"
+
+@interface DoricPopoverPlugin : DoricNativePlugin
+@end

iOS/Pod/Classes/Plugin/DoricPopoverPlugin.m

@@ -0,0 +1,54 @@
+//
+// Created by pengfei.zhou on 2019/11/28.
+//
+
+#import "DoricPopoverPlugin.h"
+#import "DoricRootNode.h"
+#import "Doric.h"
+
+@interface DoricPopoverPlugin ()
+@property(nonatomic, strong) DoricRootNode *popoverNode;
+@property(nonatomic, strong) UIView *fullScreenView;
+@end
+
+@implementation DoricPopoverPlugin
+- (void)show:(NSDictionary *)params withPromise:(DoricPromise *)promise {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        UIView *superView = [UIApplication sharedApplication].windows.lastObject;
+        if (!self.fullScreenView) {
+            self.fullScreenView = [[DoricStackView new] also:^(UIView *it) {
+                it.width = superView.width;
+                it.height = superView.height;
+                it.top = it.left = 0;
+                [superView addSubview:self.fullScreenView];
+                UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissPopover)];
+                [it addGestureRecognizer:gestureRecognizer];
+            }];
+        }
+        [superView bringSubviewToFront:self.fullScreenView];
+        self.fullScreenView.hidden = NO;
+        if (!self.popoverNode) {
+            self.popoverNode = [[DoricRootNode alloc] initWithContext:self.doricContext];
+            DoricStackView *view = [[DoricStackView alloc] initWithFrame:self.fullScreenView.frame];
+            [self.popoverNode setupRootView:view];
+        }
+        [self.popoverNode render:params[@"props"]];
+        [promise resolve:nil];
+    });
+}
+
+- (void)dismiss:(NSDictionary *)params withPromise:(DoricPromise *)promise {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self dismissPopover];
+        [promise resolve:nil];
+    });
+}
+
+- (void)dismissPopover {
+    self.popoverNode.view.hidden = YES;
+    self.fullScreenView.hidden = YES;
+    [self.popoverNode.view.subviews forEach:^(__kindof UIView *obj) {
+        [obj removeFromSuperview];
+    }];
+}
+@end

iOS/Pod/Classes/Plugin/DoricShaderPlugin.m

@@ -43,6 +43,15 @@ - (void)render:(NSDictionary *)argument {
     });
 }
 
+- (DoricViewNode *)headViewNodeByViewId:(NSString *)viewId {
+    for (DoricViewNode *node in self.doricContext.headNodes) {
+        if ([viewId isEqualToString:node.viewId]) {
+            return node;
+        }
+    }
+    return self.doricContext.rootNode;
+}
+
 - (id)command:(NSDictionary *)argument withPromise:(DoricPromise *)promise {
     NSArray *viewIds = argument[@"viewIds"];
     id args = argument[@"args"];
@@ -50,7 +59,7 @@ - (id)command:(NSDictionary *)argument withPromise:(DoricPromise *)promise {
     DoricViewNode *viewNode = nil;
     for (NSString *viewId in viewIds) {
         if (!viewNode) {
-            viewNode = self.doricContext.rootNode;
+            viewNode = [self headViewNodeByViewId:viewId];
         } else {
             if ([viewNode isKindOfClass:[DoricSuperNode class]]) {
                 viewNode = [((DoricSuperNode *) viewNode) subNodeWithViewId:viewId];