源碼分析：
+ (BOOL)isMemberOfClass:(Class)cls {
return object_getClass((id)self) == cls;
}
- (BOOL)isMemberOfClass:(Class)cls {
return [self class] == cls;
}
+ (BOOL)isKindOfClass:(Class)cls {
// 獲取的是該類的meta class
for (Class tcls = object_getClass((id)self); tcls; tcls = tcls->superclass) {
if (tcls == cls) return YES;
}
return NO;
}
- (BOOL)isKindOfClass:(Class)cls {
for (Class tcls = [self class]; tcls; tcls = tcls->superclass) {
if (tcls == cls) return YES;
}
return NO;
}
class和meta class關系
總結：
+ (BOOL)isMemberOfClass:是判斷該類的meta class是否和class相等理朋。- (BOOL)isMemberOfClass:判斷該對象所屬的類是和class相等橡羞，即用于判斷一個對象是否屬于當前這個類阳欲。+ (BOOL)isKindOfClass:循環(huán)遍歷該類的meta class的super class者蠕，判斷是否和class相等（只有NSObject的meta class的super class等于NSObject）檩奠。- (BOOL)isKindOfClass:循環(huán)遍歷該對象所屬的類及super class，判斷是否和class相等蔓挖，即用于判斷當前對象是否屬于這個類或者這個類的子類夕土；。
