方法一：objc_copyImageNames
OC
const char * _Nonnull * objc_copyImageNames(unsigned int *outCount);
const char * imageNames = *objc_copyImageNames(&i);
NSString *imageNamesString = [NSString stringWithCString:imageNames encoding:kCFStringEncodingUTF8];
NSArray *imageNamesStringArray = [[imageNamesString stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:@""] componentsSeparatedByString:@"/"];
int imageNameTmp = 0;
while (imageNameTmp < imageNamesStringArray.count) {
NSLog(@"%@", imageNamesStringArray[imageNameTmp]);
imageNameTmp ++;
}
方法二：class_getImageName
OC
const char * class_getImageName(Class cls);
NSArray *imageNameArray = [[[NSString stringWithCString:class_getImageName([self class]) encoding:kCFStringEncodingUTF8] stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:@""] componentsSeparatedByString:@"/"];
方法三：objc_copyClassNamesForImage
OC
const char * _Nonnull * objc_copyClassNamesForImage(const char *image, unsigned int *outCount);
NSLog(@"%s", *objc_copyClassNamesForImage(class_getImageName(NSClassFromString(@"UIView")), &i));
方法四：sel_getName
OC
const char * sel_getName(SEL sel);
NSLog(@"%s", sel_getName(@selector(load)));
方法五：sel_registerName
OC
Discussion:sel——registerName就相当于@selector()
SEL sel_registerName(const char *str);
SEL loadSel = sel_registerName("load");
方法六：sel_getUid
OC
SEL sel_getUid(const char *str);
SEL loadSel = sel_getUid("load");
方法七：sel_isEqual
OC
BOOL sel_isEqual(SEL lhs, SEL rhs);
NSLog(@"%d", sel_isEqual(@selector(nsLogMySon), @selector(nslogCopy)));
方法八：objc_getProtocol
OC
Protocol * objc_getProtocol(const char *name);
NSLog(@"%s", protocol_getName(objc_getProtocol("UITableViewDelegate")));
方法九：objc_copyProtocolList
OC
Protocol * _Nonnull * objc_copyProtocolList(unsigned int *outCount);
int protocolCount = 0;
Protocol * _Nonnull __unsafe_unretained *protocolList = class_copyProtocolList([self class], &protocolCount);
j = 0;
while (j < protocolCount) {
j ++;
NSLog(@"%s", protocol_getName(*protocolList));
protocolList ++;
}
free((__bridge void *)(*protocolList));
方法十：objc_allocateProtocol
OC
Protocol * objc_allocateProtocol(const char *name);
Protocol *NewProtocol = objc_allocateProtocol("DaoXiangProtocol");
方法十一：objc_registerProtocol
OC
void objc_registerProtocol(Protocol *proto);
方法十二：protocol_addMethodDescription
Discussion: 要写在objc_registerProtocol之前
OC
void protocol_addMethodDescription(Protocol *proto, SEL name, const char *types, BOOL isRequiredMethod, BOOL isInstanceMethod);
protocol_addMethodDescription(NewProtocol, @selector(nslogCopy), "v@:", YES, YES);
方法十三：protocol_addProtocol
Discussion: 要写在objc_registerProtocol之前
OC
void protocol_addProtocol(Protocol *proto, Protocol *addition);
protocol_addProtocol(NewProtocol, objc_getProtocol("UITableViewDelegate"));
方法十四：protocol_addProperty
Discussion: 要写在objc_registerProtocol之前
OC
void protocol_addProperty(Protocol *proto, const char *name, const objc_property_attribute_t *attributes, unsigned int attributeCount, BOOL isRequiredProperty, BOOL isInstanceProperty);
objc_property_attribute_t nonatomic = {"N", ""};
objc_property_attribute_t strong = {"&", ""};
objc_property_attribute_t type = {"T", "@\"NSString\""};
objc_property_attribute_t ivar = {"V", "_qqqqq"};
objc_property_attribute_t attributes[] = {nonatomic, strong, type, ivar};
protocol_addProperty(NewProtocol, "property", attributes, 4, YES, YES);
方法十五：protocol_getName
OC
const char * protocol_getName(Protocol *proto);
NSLog(@"%s", protocol_getName(objc_getProtocol("UITableViewDelegate")));
方法十六：protocol_isEqual
OC
BOOL protocol_isEqual(Protocol *proto, Protocol *other);
NSLog(@"%d", protocol_isEqual(NewProtocol, objc_getProtocol("UITableViewDelegate")));
方法十七：protocol_copyMethodDescriptionList
OC
struct objc_method_description * protocol_copyMethodDescriptionList(Protocol *proto, BOOL isRequiredMethod, BOOL isInstanceMethod, unsigned int *outCount);
struct objc_method_description *protocolMethodList = protocol_copyMethodDescriptionList(objc_getProtocol("UITableViewDelegate"), NO, YES, &i);
for (int temp = 0; temp < i; protocolMethodList++, temp++) {
struct objc_method_description method = *protocolMethodList;
NSLog(@"%@", NSStringFromSelector(method.name));
}
方法十八：protocol_getMethodDescription
OC
struct objc_method_description protocol_getMethodDescription(Protocol *proto, SEL aSel, BOOL isRequiredMethod, BOOL isInstanceMethod);
struct objc_method_description protocolMethod = protocol_getMethodDescription(objc_getProtocol("UITableViewDelegate"), NSSelectorFromString(@"tableView:canFocusRowAtIndexPath:"), NO, YES);
NSLog(@"%@", NSStringFromSelector(protocolMethod.name));
方法十九：protocol_copyPropertyList
OC
objc_property_t _Nonnull * protocol_copyPropertyList(Protocol *proto, unsigned int *outCount);
objc_property_t *propertyList = protocol_copyPropertyList(NewProtocol, &i);
for (int j = 0; j < i; j++, propertyList++) {
NSLog(@"%s",property_getName(*propertyList));
}
free(*propertyList);
方法二十：protocol_copyPropertyList2
OC
propertyList = protocol_copyPropertyList2(NewProtocol, &i, YES, YES);
for (int j = 0; j < i; j++, propertyList++) {
NSLog(@"%s",property_getName(*propertyList));
}
free(*propertyList);
方法二十一：protocol_getProperty
OC
objc_property_t protocol_getProperty(Protocol *proto, const char *name, BOOL isRequiredProperty, BOOL isInstanceProperty);
NSLog(@"%s", property_getName(protocol_getProperty(NewProtocol, "property", YES, YES)));
方法二十二：protocol_copyProtocolList
OC
Protocol * _Nonnull __unsafe_unretained *protocolProtocolList = protocol_copyProtocolList(NewProtocol, &i);
for (int j = 0; j < i; j++, protocolProtocolList++) {
NSLog(@"%s", protocol_getName((*protocolProtocolList)));
}
方法二十三：protocol_conformsToProtocol
OC
BOOL protocol_conformsToProtocol(Protocol *proto, Protocol *other);
bool iqwe = protocol_conformsToProtocol(NewProtocol, objc_getProtocol("UITableViewDelegate"));
方法二十四：property_getName
OC
const char * property_getName(objc_property_t property);
NSLog(@"%s", property_getName(protocol_getProperty(NewProtocol, "property", YES, YES)));
方法二十五：property_getAttributes
OC
const char * property_getAttributes(objc_property_t property);
NSLog(@"%s", property_getAttributes(*propertyList));
方法二十六：property_copyAttributeValue
OC
char * property_copyAttributeValue(objc_property_t property, const char *attributeName);
NSLog(@"%s", property_copyAttributeValue(*propertyList, "V"));
方法二十七：property_copyAttributeList
OC
objc_property_attribute_t * property_copyAttributeList(objc_property_t property, unsigned int *outCount);
unsigned int count;
objc_property_attribute_t *attributeList = property_copyAttributeList(*propertyList, &count);
NSLog(@"%s", (*attributeList).name);
方法二十八：objc_enumerationMutation
Discussion: 在获取enumState.itemsPtr中每个元素前，都检查一遍enumState.mutationsPtr所指标志是否改变，改变则抛出异常
对__NSArrayI，enumState.mutationsPtr指向一个静态局部变量，永远也不会抛异常
对__NSArrayM，enumState.mutationsPtr指向_mutations变量, 每次增删操作后,_mutations会+1
OC
void objc_enumerationMutation(id obj);
NSArray *arr;
id l_collection = (id) arr;
objc_enumerationMutation(l_collection);
方法二十九：imp_implementationWithBlock
OC
IMP imp_implementationWithBlock(id block);
imp_implementationWithBlock(block)
方法三十：imp_getBlock
id imp_getBlock(IMP anImp);
newBlock = imp_getBlock(imp_implementationWithBlock(block));
newBlock();
方法三十一：imp_removeBlock
BOOL imp_removeBlock(IMP anImp);
imp_removeBlock(imp_implementationWithBlock(block));
方法三十二：objc_loadWeak
OC
id objc_loadWeak(id _Nullable *location);
__weak NSNumber *myWeak = @0;
NSNumber *newWeak = objc_loadWeak(&myWeak);
方法三十三：objc_storeWeak
OC
id objc_storeWeak(id _Nullable *location, id obj);
NSNumber *aaa = objc_storeWeak(&myWeak, @1);
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