iOS开发——高级技术OC篇&运行时（Runtime）机制

 1 unsigned int count = 0;
 2 
 3     Ivar *ivars = class_copyIvarList([iCocosObject class], &count);
 4 
 5 //    Ivar *ivars = class_copyMethodList(<#__unsafe_unretained Class cls#>, <#unsigned int *outCount#>)
 6 
 7 //    Ivar *ivars = class_copyPropertyList(<#__unsafe_unretained Class cls#>, <#unsigned int *outCount#>);
 8 
 9 //    Ivar *ivars = class_copyProtocolList(<#__unsafe_unretained Class cls#>, <#unsigned int *outCount#>)
10 
11     
12 
13     for (int i = 0; i < count; i++) {
14 
15         Ivar ivar = ivars[i];
16 
17         
18 
19         NSString *name = @(ivar_getName(ivar));
20 
21         NSLog(@"%@", name);
22 
23         
24 
25         NSLog(@"*****************");
26 
27         const char *iv = ivar_getName(ivar);
28 
29         
30 
31         
32 
33         NSLog(@"%s", iv);
34 
35         
36 
37         NSLog(@"*****************");
38 
39         const char *ivs =  ivar_getTypeEncoding(ivar);
40 
41         
42 
43         NSLog(@"%s", ivs);
44 
45     }

 1  unsigned int meth = 0;
 2 
 3     Method *met = class_copyMethodList([iCocosObject class], &meth);
 4 
 5     for (int i = 0; i < meth; i++) {
 6 
 7         Method m = met[i];
 8 
 9         
10 
11         SEL sel = method_getName(m);
12 
13         NSString *str = NSStringFromSelector(sel);
14 
15         
16 
17         NSLog(@"%@",str);
18 
19     }
20 
21     

 1 unsigned int pro = 0;
 2 
 3     Protocol * __unsafe_unretained *proto =  class_copyProtocolList([iCocosObject class], &pro);
 4 
 5     for (int i = 0; i < pro; i++) {
 6 
 7         Method p = (__bridge Method)(proto[i]);
 8 
 9         
10 
11         const char *pr = protocol_getName((__bridge Protocol *)(p));
12 
13 //        NSString *str = NSStringFromSelector(pr);
14 
15         
16 
17         NSLog(@"%s",pr);
18 
19     }
20 
21     

 1  unsigned int xs = 0;
 2 
 3     objc_property_t *xsL = class_copyPropertyList([iCocosObject class], &xs);
 4 
 5     for (int i = 0; i < xs; i++) {
 6 
 7         objc_property_t xslist = xsL[i];
 8 
 9         
10 
11         const char *x = property_getName(xslist);
12 
13 //        NSString *str = NSStringFromSelector(x);
14 
15         
16 
17         NSLog(@"%s",x);
18 
19     }
20 
21     
22 
23     
24 
25 //    objc_msgSend()
26 
27 //    objc_getClass(<#const char *name#>);
28 
29 //    sel_registerName(<#const char *str#>);
30 
31     
32 
33 //     iCocosView *view = objc_msgSend(objc_msgSend(objc_getClass("iCocosView"), sel_registerName("alloc")), sel_registerName("init"));
34 
35     
36 
37     

 1     Method one =  class_getClassMethod([iCocosObject class], @selector(iCocosMethos));
 2 
 3     Method two =  class_getClassMethod([iCocosObject class], @selector(iCocosMetho));
 4 
 5     method_exchangeImplementations(one, two);
 6 
 7     
 8 
 9     Method o =  class_getInstanceMethod([iCocosObject class], @selector(iCocosMethos));
10 
11     Method t =  class_getInstanceMethod([iCocosObject class], @selector(iCocosMetho));
12 
13     method_exchangeImplementations(o, t);
14 
15     
16 
17     //    class_getInstanceSize(<#__unsafe_unretained Class cls#>);
18 
19     //    class_getInstanceVariable(<#__unsafe_unretained Class cls#>, <#const char *name#>);
20 
21     //    class_getMethodImplementation_stret(<#__unsafe_unretained Class cls#>, <#SEL name#>);
22 
23     
24 
25     //    class_getClassVariable(<#__unsafe_unretained Class cls#>, <#const char *name#>);
26 
27     //    class_getSuperclass(<#__unsafe_unretained Class cls#>);
28 
29     
30 
31     //    class_getProperty(<#__unsafe_unretained Class cls#>, <#const char *name#>);
32 
33     //    class_getName(<#__unsafe_unretained Class cls#>);
34 
35     
36 
37     
38 
39     
40 
41 //    class_replaceMethod(<#__unsafe_unretained Class cls#>, <#SEL name#>, <#IMP imp#>, <#const char *types#>);
42 
43     

1 //    class_addIvar(<#__unsafe_unretained Class cls#>, <#const char *name#>, <#size_t size#>, <#uint8_t alignment#>, <#const char *types#>);
2 
3 //    class_addMethod(<#__unsafe_unretained Class cls#>, <#SEL name#>, <#IMP imp#>, <#const char *types#>);
4 
5 //    class_addProperty(<#__unsafe_unretained Class cls#>, <#const char *name#>, <#const objc_property_attribute_t *attributes#>, <#unsigned int attributeCount#>);
6 
7 //    class_addProtocol(<#__unsafe_unretained Class cls#>, <#Protocol *protocol#>);
8 
9     

 1     //在load中实现下面的代码
 2 
 3     Method ic =  class_getInstanceMethod(NSClassFromString(@"_NSArrayM"), @selector(iCocosobject:));
 4 
 5     Method add =  class_getInstanceMethod(NSClassFromString(@"_NSArrayM"), @selector(addObject:));
 6 
 7     method_exchangeImplementations(ic, add);
 8 
 9  
10 
11     
12 
13     //实现iCocosobject方法:(实现相应的功能，这里只是去掉非空)
14 
15 //    if (object != nil) {
16 
17 //        [self iCocosobject:object];
18 
19 //    }
20 
21  

    objc_msgSend();

//    objc_getClass(<#const char *name#>);

//    objc_getMetaClass(<#const char *name#>);

//    objc_getClassList(<#__unsafe_unretained Class *buffer#>, <#int bufferCount#>);

//    objc_getProtocol(<#const char *name#>);

//    object_getIvar(<#id obj#>, <#Ivar ivar#>);

//    objc_getRequiredClass(<#const char *name#>);

//    objc_getAssociatedObject(<#id object#>, <#const void *key#>);//关联对象
 
}

@end

 

 1  
 2 
 3 @implementation NSObject(Extension)
 4 
 5  
 6 
 7 /**
 8 
 9  *  给NSObject添加一个分类
10 
11  */
12 
13  
14 
15 +(void)swizzleClassMethod:(Class)class originalSelector:(SEL)originSelector otherSelector:(SEL)otherSelector
16 
17 {
18 
19     Method other = class_getClassMethod(class, otherSelector);
20 
21     Method origin = class_getClassMethod(class, originSelector);
22 
23     method_exchangeImplementations(other, origin);
24 
25 }
26 
27  
28 
29 +(void)swizzleInstanceMethod:(Class)class originalSelector:(SEL)originSelector otherSelector:(SEL)otherSelector
30 
31 {
32 
33     Method other = class_getInstanceMethod(class, otherSelector);
34 
35     Method origin = class_getInstanceMethod(class, originSelector);
36 
37     method_exchangeImplementations(other, origin);
38 
39 } 
40 
41 @end

 1 @interface NSObject(iCocos)
 2 
 3  
 4 
 5 //头文件中声明一个属性
 6 
 7 @property (nonatomic, assign) double height;
 8 
 9  
10 
11 @end
12 
13  
14 
15  
16 
17 @implementation NSObject(iCocos)
18 
19  
20 
21 static double heightKey;//用来参考
22 
23  
24 
25 -(void)setHeight:(double)height
26 
27 {
28 
29     objc_setAssociatedObject(self, &heightKey, @(height), OBJC_ASSOCIATION_ASSIGN);
30 
31 }
32 
33  
34 
35 -(double)height
36 
37 {
38 
39     return [objc_getAssociatedObject(self, &heightKey) doubleValue];
40 
41 }
42 
43  
44 
45 @end
46 
47  

 1 @implementation NSObject (Model)
 2 
 3  
 4 
 5 + (instancetype)objcWithDict:(NSDictionary *)dict mapDict:(NSDictionary *)mapDict
 6 
 7 {
 8 
 9     
10 
11     
12 
13     id objc = [[self alloc] init];
14 
15     
16 
17     unsigned int count = 0;
18 
19     Ivar *ivars = class_copyIvarList(self, &count);
20 
21     
22 
23     for (int i = 0; i < count; i++) {
24 
25         Ivar ivar = ivars[i];
26 
27         
28 
29         NSString *name = @(ivar_getName(ivar));
30 
31         
32 
33         name = [name substringFromIndex:1];
34 
35         
36 
37         id value = dict[name];
38 
39         
40 
41         if (value == nil) {
42 
43             
44 
45             if (mapDict) {
46 
47                 NSString *mapName = mapDict[name];
48 
49                 
50 
51                 value = dict[mapName];
52 
53             }
54 
55             
56 
57         }
58 
59         
60 
61         [objc setValue:value forKeyPath:name];
62 
63     }
64 
65     
66 
67     
68 
69     return objc;
70 
71 }
72 
73  
74 
75 @end