Created
August 13, 2017 15:32
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鸭子对象例子
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| // | |
| // YYDuckObj.h | |
| // YYDuckObj | |
| // | |
| // Created by yauzz on 17/8/13. | |
| // Copyright © 2017年 yauzz. All rights reserved. | |
| // | |
| #import <Foundation/Foundation.h> | |
| @interface YYDuckObj : NSObject | |
| @property (nonatomic, strong) NSMutableDictionary *propertys; | |
| - (instancetype)initWithProtocol:(Protocol *)aProtocol; | |
| @end |
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| // | |
| // YYDuckObj.m | |
| // YYDuckObj | |
| // | |
| // Created by yauzz on 17/8/13. | |
| // Copyright © 2017年 yauzz. All rights reserved. | |
| // | |
| #import "YYDuckObj.h" | |
| #import <YYModel/YYClassInfo.h> | |
| #import <objc/objc.h> | |
| @interface YYDuckObj () | |
| @property (nonatomic, copy) NSDictionary *propertyInfos; | |
| @end | |
| @implementation YYDuckObj | |
| - (instancetype)initWithProtocol:(Protocol *)aProtocol | |
| { | |
| self = [super init]; | |
| if (self) { | |
| unsigned int outCount; | |
| NSMutableDictionary *dicts = [NSMutableDictionary dictionary]; | |
| objc_property_t *pro = protocol_copyPropertyList(aProtocol, &outCount); | |
| for (int i = 0; i < outCount; i++) { | |
| YYClassPropertyInfo *info = [[YYClassPropertyInfo alloc] initWithProperty:pro[i]]; | |
| [dicts setObject:info forKey:NSStringFromSelector(info.getter)]; | |
| } | |
| self.propertyInfos = dicts; | |
| self.propertys = [NSMutableDictionary dictionary]; | |
| } | |
| return self; | |
| } | |
| + (BOOL)resolveInstanceMethod:(SEL)sel | |
| { | |
| return YES; | |
| } | |
| - (id)forwardingTargetForSelector:(SEL)aSelector | |
| { | |
| return self; | |
| } | |
| - (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector | |
| { | |
| YYClassPropertyInfo *propertyInfo = [self.propertyInfos objectForKey:NSStringFromSelector(aSelector)]; | |
| if (propertyInfo) { | |
| if ([propertyInfo.typeEncoding isEqualToString:@"i"]) { | |
| return [self methodSignatureForSelector:@selector(getMethodReturnInt32WithKey:)]; | |
| } | |
| } | |
| return [super methodSignatureForSelector:aSelector]; | |
| } | |
| - (void)forwardInvocation:(NSInvocation *)anInvocation | |
| { | |
| YYClassPropertyInfo *propertyInfo = [self.propertyInfos objectForKey:NSStringFromSelector(anInvocation.selector)]; | |
| if (propertyInfo) { | |
| if ([propertyInfo.typeEncoding isEqualToString:@"i"]) { | |
| SEL originSel = anInvocation.selector; | |
| anInvocation.selector = @selector(getMethodReturnInt32WithKey:); | |
| [anInvocation setArgument:&originSel atIndex:2]; | |
| } | |
| [anInvocation invoke]; | |
| } | |
| } | |
| - (id)getMethodReturnIDWithKey:(SEL)aSelector | |
| { | |
| return @"hahahah"; | |
| } | |
| - (int)getMethodReturnInt32WithKey:(SEL)aSelector | |
| { | |
| NSString *value = [self.propertys objectForKey:NSStringFromSelector(aSelector)]; | |
| if (value) { | |
| return value.intValue; | |
| } else { | |
| return 0; | |
| } | |
| } | |
| @end |
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