Objective-C 對(duì)象復(fù)制 簡(jiǎn)單實(shí)現(xiàn)
Objective-C 對(duì)象復(fù)制 簡(jiǎn)單實(shí)現(xiàn)是本文要介紹的內(nèi)容,也行對(duì)Objective-C 也不算陌生了,我們先來看內(nèi)容。
Foundation系統(tǒng)對(duì)象(NSString,NSArray等)
只有遵守NSCopying 協(xié)議的類才可以發(fā)送copy消息
只有遵守 NSMutableCopying 協(xié)議的類才可以發(fā)送mutableCopy消息
copy和mutableCopy區(qū)別就是copy返回后的是不能修改的對(duì)象, 而mutableCopy返回后是可以修改的對(duì)象。
這個(gè)兩個(gè)方法復(fù)制的對(duì)象都需要手動(dòng)釋放。
自義定義Class
自義定Class也需要實(shí)現(xiàn)NSCopying協(xié)義或NSMutableCopying協(xié)議后,其對(duì)象才能提供copy功能。代碼
- //TestProperty.h
- #import <Cocoa/Cocoa.h>
- @interface TestProperty : NSObject <NSCopying>{
- NSString *name; NSString *password;
- NSMutableString *interest;
- NSInteger myInt;}@property (retain,nonatomic)
- NSString *name,*password;
- @property (retain,nonatomic) NSMutableString *interest;
- @property NSInteger myInt;
- -(void) rename:(NSString *)newname;
- @end//TestProperty.m
- #import "TestProperty.h"
- @implementation TestProperty
- @synthesize name,password,interest;
- @synthesize myInt;
- -(void) rename:(NSString *)newname{
- // 這里可以直接寫成
- // self.name = newname;
- // if (name != newname) {
- [name autorelease];
- name = newname;
- [name retain];
- }
- }
- -(void) dealloc{
- self.name = nil;
- self.password = nil;
- self.interest = nil;
- [super dealloc];}- (id)copyWithZone:(NSZone *)zone{
- TestProperty *newObj = [[[self class] allocWithZone:zone] init];
- newObj.name = name;
- newObj.password = password;
- newObj.myInt = myInt;
- //深復(fù)制 NSMutableString *tmpStr = [interest mutableCopy];
- newObj.interest = tmpStr;
- [tmpStr release];
- //淺復(fù)制 //newObj.
- interestinterest = interest;
- return newObj;
- }
- @end
小結(jié):Objective-C 對(duì)象復(fù)制 簡(jiǎn)單實(shí)現(xiàn)的內(nèi)容介紹完,希望本文對(duì)你有所幫助!