add iOS Image Node

iOS/Pod/Classes/Shader/DoricImageNode.m

@@ -0,0 +1,36 @@
+//
+//  DoricImageNode.m
+//  Doric
+//
+//  Created by pengfei.zhou on 2019/8/6.
+//
+
+#import "DoricImageNode.h"
+#import <SDWebImage/SDWebImage.h>
+
+@implementation DoricImageNode
+
+- (UIView *)build:(NSDictionary *)props {
+    return [[UIImageView alloc] init];
+}
+
+- (void)blendView:(UIImageView *)view forPropName:(NSString *)name propValue:(id)prop {
+    if ([name isEqualToString:@"imageUrl"]) {
+        __weak typeof(self) _self = self;
+        [view sd_setImageWithURL:[NSURL URLWithString:prop] completed:^(UIImage * _Nullable image, NSError * _Nullable error, SDImageCacheType cacheType, NSURL * _Nullable imageURL) {
+            __strong typeof(_self) self = _self;
+            [self requestLayout];
+        }];
+    } else {
+        [super blendView:view forPropName:name propValue:prop];
+    }
+}
+
+- (void)measureByParent:(DoricGroupNode *)parent {
+    DoricLayoutDesc widthSpec = self.layoutParams.width;
+    DoricLayoutDesc heightSpec = self.layoutParams.height;
+    if (widthSpec == LAYOUT_WRAP_CONTENT || heightSpec == LAYOUT_WRAP_CONTENT) {
+        [self.view sizeToFit];
+    }
+}
+@end