{"id":259,"date":"2016-03-13T17:30:11","date_gmt":"2016-03-13T09:30:11","guid":{"rendered":"http:\/\/www.yusian.com\/blog\/?p=259"},"modified":"2016-07-15T17:17:13","modified_gmt":"2016-07-15T09:17:13","slug":"%e8%b0%88%e8%b0%88%e6%95%b0%e7%bb%84%e7%9a%84%e6%b5%85%e6%8b%b7%e8%b4%9d%e5%92%8c%e6%b7%b1%e6%8b%b7%e8%b4%9d%ef%bc%88copy-mutablecopy%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/project\/2016\/03\/13\/173011259.html","title":{"rendered":"\u8c08\u8c08\u6570\u7ec4\u7684\u6d45\u62f7\u8d1d\u548c\u6df1\u62f7\u8d1d\uff08copy & mutableCopy\uff09"},"content":{"rendered":"

1\u3001\u57fa\u672c\u5206\u6790
\n1.1\u3001\u6570\u7ec4\u6709\u4e24\u79cd\u5f62\u5f0f\uff0cNSArray\u548cNSMutableArray\uff1b
\n1.2\u3001\u62f7\u8d1d\u4e5f\u6709\u4e24\u4e2a\u65b9\u6cd5copy\u548cmutableCopy\uff1b
\n1.3\u3001\u90a3\u4e48\u76f8\u4e92\u7ec4\u5408\u5c31\u4f1a\u6709\u56db\u79cd\u60c5\u51b5\uff1aNSArray\u7684copy\u3001mutableCopy\uff1bNSMutableArray\u7684copy\u3001mutableCopy\uff1b<\/p>\n

2\u3001\u4ee3\u7801\u9a8c\u8bc1
\n2.1\u3001\u5148\u521b\u5efa\u4e00\u4e2aNSObject\u5bf9\u8c61\u4e0e\u4e00\u4e2aNSArray\u6570\u7ec4\uff0c\u5c06\u5bf9\u8c61\u653e\u5230\u6570\u7ec4\u4e2d\uff1b
\n2.2\u3001\u5206\u522b\u5bf9NSArray\u6570\u7ec4\u8fdb\u884ccopy\u4e0emutableCopy\uff0c\u67e5\u770b\u5f97\u5230\u7684\u7ed3\u679c\u6570\u636e\u7c7b\u578b\u53ca\u5730\u5740<\/p>\n

NSObject *object = [[NSObject alloc] init];
\nNSArray *array<\/strong><\/span> = [NSArray arrayWithObject:object];
\nNSArray *copy<\/span><\/strong> = [array copy];
\nNSArray *mutableCopy<\/span><\/strong> = [array mutableCopy];<\/p>\n

Printing description of array<\/span><\/strong>: <__NSArrayI 0x7fa739e2ad90> ( <NSObject: 0x7fa739e09240>)
\nPrinting description of copy<\/span><\/strong>: <__NSArrayI 0x7fa739e2ad90> ( <NSObject: 0x7fa739e09240>)
\nPrinting description of mutableCopy<\/span><\/strong>: <__NSArrayM 0x7fa739e1aa00> ( <NSObject: 0x7fa739e09240>)<\/p>\n

2.3\u3001\u5206\u522b\u5bf9NSMutableArray\u8fdb\u884ccopy\u4e0emutableCopy\uff0c\u67e5\u770b\u5f97\u5230\u7684\u7ed3\u679c\u6570\u636e\u7c7b\u578b\u53ca\u5730\u5740<\/p>\n

NSObject *object = [[NSObject alloc] init];
\nNSMutableArray *mutableArray<\/strong><\/span> = [NSMutableArray arrayWithObject:object];
\nNSArray *copy<\/span><\/strong> = [mutableArray copy];
\nNSArray *mutableCopy<\/span><\/strong> = [mutableArray mutableCopy];<\/p>\n

Printing description of mutableArray<\/strong><\/span>: <__NSArrayM 0x7f8a1af6ba70> ( <NSObject: 0x7f8a1af65970> )
\nPrinting description of copy<\/span><\/strong>: <__NSArrayI 0x7f8a1af66650> ( <NSObject: 0x7f8a1af65970> )
\nPrinting description of mutableCopy<\/span><\/strong>: <__NSArrayM 0x7f8a1af12150> ( <NSObject: 0x7f8a1af65970> )<\/p>\n

3\u3001\u7ed3\u679c\u5206\u6790\uff1a
\n3.1\u3001\u5bf9\u4e8eNSArray\u6765\u8bb2\uff0c\u539f\u6570\u7ec4\u3001copy\u3001mutableCopy\u7684\u7ed3\u679c\u5bf9\u6bd4\uff1a
\nNSArrayI? ?0x7fa739e2ad90
\nNSArrayI? ?0x7fa739e2ad90
\nNSArrayM 0x7fa739e1aa00
\n3.2\u3001\u5bf9\u4e8eNSMutableArray\u6765\u8bb2\uff0c\u539f\u6570\u7ec4\u3001copy\u3001mutableCopy\u7684\u7ed3\u679c\u5bf9\u6bd4\uff1a
\nNSArrayM 0x7f8a1af6ba70
\nNSArrayI?? 0x7f8a1af66650
\nNSArrayM 0x7f8a1af12150<\/p>\n

3.3\u3001\u5f97\u51fa\u4ee5\u4e0b\u7ed3\u8bba\uff1a
\nA\u3001copy\u5f97\u5230\u7684\u7ed3\u679c\u4e00\u5b9a\u662fNSArray\u7c7b\u578b\uff0cmutableCopy\u5f97\u5230\u7684\u4e00\u5b9a\u662fNSMutableArray\u7c7b\u578b\uff1b
\nB\u3001NSArray\u7684copy\u65b9\u6cd5\u7531\u4e8e\u6ca1\u6709\u7c7b\u578b\u8f6c\u6362\uff0c\u5f97\u5230\u7684\u8fd8\u662f\u539f\u6570\u7ec4\uff0c\u76f8\u5f53\u4e8e\u8d4b\u503c\uff0c\u6ca1\u6709\u521b\u5efa\u65b0\u6570\u7ec4\uff1b
\nC\u3001NSArray\u7684mutableCopy\u65b9\u6cd5\u5f97\u5230\u4e86\u4e0e\u539f\u6570\u7ec4\u7c7b\u578b\u4e0d\u540c\u7684\u53ef\u53d8\u6570\u7ec4\uff0c\u6bcb\u5eb8\u7f6e\u7591\u521b\u5efa\u4e86\u65b0\u6570\u7ec4\uff1b
\nD\u3001NSMutableArray\u7684copy\u65b9\u6cd5\u53c2\u7167A\uff0c\u5f97\u5230\u7684\u7c7b\u578b\u4e0e\u539f\u6570\u7ec4\u7c7b\u578b\u4e0d\u540c\uff0c\u6bcb\u5eb8\u7f6e\u7591\u521b\u5efa\u4e86\u65b0\u6570\u7ec4\uff1b
\nE\u3001NSMutableArray\u7684mutableCopy\u65b9\u6cd5\uff0c\u5f97\u5230\u7684\u7c7b\u578b\u4e0e\u539f\u6570\u7ec4\u7c7b\u578b\u76f8\u540c\uff0c\u4f46\u540c\u6837\u521b\u5efa\u4e86\u65b0\u6570\u7ec4\uff1b
\nF\u3001\u6bd4\u8f83B\u4e0eE\uff0c\u518d\u53c2\u7167A\u63a8\u65ad\uff0cE\u5e94\u8be5\u4e5f\u53ea\u662f\u8d4b\u503c\u7684\u6548\u679c\uff0c\u7136\u800c\u7ed3\u679c\u5374\u4e0d\u662f\uff0c\u53ef\u80fd\u8fd9\u5c31\u662fmutableCopy\u6240\u8c13\u7684\u6df1\u62f7\u8d1d\u7f18\u6545\u5427\uff01<\/span><\/p>\n

3.4\u3001\u4ed4\u7ec6\u89c2\u5bdf\u6bd4\u8f83\u7ed3\u679c\u91cc\u9762\u8fd8\u4e00\u4e2a\u7279\u70b9\uff0c\u5373\u65e0\u8bba\u4f55\u79cd\u62f7\u8d1d\uff0cNSObject\u4ece\u5934\u5230\u5c3e\u90fd\u662f\u6ca1\u6709\u53d8\u5316\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5c3d\u7ba1\u6570\u7ec4\u672c\u8eab\u5f00\u8f9f\u4e86\u65b0\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u4f46\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u5374\u4f9d\u65e7\u8fd8\u662f\u4e0d\u53d8\u7684\u90a3\u4e9b\u5143\u7d20\uff0c\u7ad9\u5728\u5143\u7d20\u672c\u8eab\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u53ea\u662f\u591a\u4e86\u51e0\u4e2a\u6307\u9488\u6307\u5411\u4e86\u4ed6\u800c\u5df2\uff1b<\/p>\n

3.5\u3001\u5982\u679c\u5728\u62f7\u8d1d\u7684\u65f6\u5019\u5e0c\u671b\u8fde\u540c\u6570\u7ec4\u5185\u5143\u7d20\u4e5f\u62f7\u8d1d\u4e00\u4efd\u5219\u9700\u8981\u8c03\u7528\u6570\u7ec4\u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5\uff1a
\n– (instancetype)initWithArray:(NSArray<ObjectType> *)array copyItems:(BOOL)flag;<\/span><\/p>\n

3.6\u3001\u6570\u7ec4\u4e2d\u5143\u7d20\u5982\u679c\u6ca1\u6709\u5b9e\u73b0NSCoping\u534f\u8bae\uff0c\u5219\u8fd8\u9700\u8981\u5148\u5b9e\u73b0\u8be5\u534f\u8bae\uff0c\u5426\u5219\u62f7\u8d1d\u4f1a\u51fa\u9519\uff0c\u7cfb\u7edf\u81ea\u5e26\u7684\u7c7b\u5982\uff1aNSString\u3001NSArray\u3001NSDictionay\u3001NSNumber\u7b49\u5df2\u5b9e\u73b0NSCoping\u534f\u8bae\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

1\u3001\u57fa\u672c\u5206\u6790 1.1\u3001\u6570\u7ec4\u6709\u4e24\u79cd\u5f62\u5f0f\uff0cNSArray\u548cNSMutableArray\uff1b 1.2\u3001\u62f7\u8d1d\u4e5f\u6709\u4e24\u4e2a\u65b9\u6cd5copy\u548cmutableCopy\uff1b 1.3\u3001\u90a3\u4e48\u76f8\u4e92\u7ec4\u5408\u5c31\u4f1a\u6709\u56db\u79cd\u60c5\u51b5\uff1aNSArray\u7684copy\u3001mutableCopy\uff1bNSMutableArray\u7684copy\u3001mutableCopy\uff1b 2\u3001\u4ee3\u7801\u9a8c\u8bc1 2.1\u3001\u5148\u521b\u5efa\u4e00\u4e2aNSObject\u5bf9\u8c61\u4e0e\u4e00\u4e2aNSArray\u6570\u7ec4\uff0c\u5c06\u5bf9\u8c61\u653e\u5230\u6570\u7ec4\u4e2d\uff1b 2.2\u3001\u5206\u522b\u5bf9NSArray\u6570\u7ec4\u8fdb\u884ccopy\u4e0emutableCopy\uff0c\u67e5\u770b\u5f97\u5230\u7684\u7ed3\u679c\u6570\u636e\u7c7b\u578b\u53ca\u5730\u5740<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[20],"class_list":["post-259","post","type-post","status-publish","format-standard","hentry","category-project","tag-basics"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/comments?post=259"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/259\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}