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Pods/LookinServer/Src/Base/LookinIvarTrace.h

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+#ifdef SHOULD_COMPILE_LOOKIN_SERVER 
+
+//
+//  LookinIvarTrace.h
+//  Lookin
+//
+//  Created by Li Kai on 2019/4/30.
+//  https://lookin.work
+//
+
+#import <Foundation/Foundation.h>
+
+extern NSString *const LookinIvarTraceRelationValue_Self;
+
+/// 如果 hostClassName 和 ivarName 均 equal，则认为两个 LookinIvarTrace 对象彼此 equal
+/// 比如 A 是 B 的 superview，且 A 的 "_stageView" 指向 B，则 B 会有一个 LookinIvarTrace：hostType 为 “superview”，hostClassName 为 A 的 class，ivarName 为 “_stageView”
+@interface LookinIvarTrace : NSObject <NSSecureCoding, NSCopying>
+
+/// 该值可能是 "superview"、"superlayer"、“self” 或 nil
+@property(nonatomic, copy) NSString *relation;
+
+@property(nonatomic, copy) NSString *hostClassName;
+
+@property(nonatomic, copy) NSString *ivarName;
+
+#pragma mark - No Coding
+
+#if TARGET_OS_IPHONE
+@property(nonatomic, weak) id hostObject;
+#endif
+
+@end
+
+@interface NSObject (LookinServerTrace)
+
+@property(nonatomic, copy) NSArray<LookinIvarTrace *> *lks_ivarTraces;
+
+@end
+
+#endif /* SHOULD_COMPILE_LOOKIN_SERVER */

Pods/LookinServer/Src/Base/LookinIvarTrace.m

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+#ifdef SHOULD_COMPILE_LOOKIN_SERVER 
+
+//
+//  LookinIvarTrace.m
+//  Lookin
+//
+//  Created by Li Kai on 2019/4/30.
+//  https://lookin.work
+//
+
+#import "LookinIvarTrace.h"
+
+NSString *const LookinIvarTraceRelationValue_Self = @"self";
+
+@implementation LookinIvarTrace
+
+#pragma mark - Equal
+
+- (NSUInteger)hash {
+    return self.hostClassName.hash ^ self.ivarName.hash;
+}
+
+- (BOOL)isEqual:(id)object {
+    if (self == object) {
+        return YES;
+    }
+    if (![object isKindOfClass:[LookinIvarTrace class]]) {
+        return NO;
+    }
+    LookinIvarTrace *comparedObj = object;
+    if ([self.hostClassName isEqualToString:comparedObj.hostClassName] && [self.ivarName isEqualToString:comparedObj.ivarName]) {
+        return YES;
+    }
+    return NO;
+}
+
+#pragma mark - <NSCopying>
+    
+- (id)copyWithZone:(NSZone *)zone {
+    LookinIvarTrace *newTrace = [[LookinIvarTrace allocWithZone:zone] init];
+    newTrace.relation = self.relation;
+    newTrace.hostClassName = self.hostClassName;
+    newTrace.ivarName = self.ivarName;
+    return newTrace;
+}
+
+#pragma mark - <NSCoding>
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+    [aCoder encodeObject:self.relation forKey:@"relation"];
+    [aCoder encodeObject:self.hostClassName forKey:@"hostClassName"];
+    [aCoder encodeObject:self.ivarName forKey:@"ivarName"];
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    if (self = [super init]) {
+        self.relation = [aDecoder decodeObjectForKey:@"relation"];
+        self.hostClassName = [aDecoder decodeObjectForKey:@"hostClassName"];
+        self.ivarName = [aDecoder decodeObjectForKey:@"ivarName"];
+    }
+    return self;
+}
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+@end
+
+#endif /* SHOULD_COMPILE_LOOKIN_SERVER */