1)深copy:也就是内容copy,会 从源对象复制一份新的对象出来,新对象计数器为1,源对象的计数器不发生变化。 2)浅copy:也就是指针copy,只是将指针复制一份给对象,源对象计数器会+1,通常相当于对象retain操作。 四、自定义对象实现copy 分两步走: 1)实现copyying(mutableCopying)协议。 2)实现copyWithZone方法。
#pragma mark 练习mutablecopy语法(深拷贝)对象拷贝。 void mutablecopyTest(){ NSString *string =[[NSString alloc] initWithFormat:@"Age is %i",10]; //调用MutableCopy方法,产生一个可变的对象,MutableCopy后的对象和原来的对象不是同一个对象 ,原来的对象和新建的对象的计数器都是1 NSMutableString *str=...
x-cos-copy-source-server-side-encryption-customer-key-MD5 服务端加密密钥的 MD5 哈希值,使用 Base64 编码 例如U5L61r7jcwdNvT7frmUG8g== string 源对象使用 SSE-C 时,此头部是必选项 目标对象服务端加密(SSE)相关头部 在复制对象时可以使用服务端加密,请参见 服务端加密专用头部。 请求体 此接口无请求...
Example 5 Copy-S3Object -BucketName amzn-s3-demo-bucket -KeyPrefix data -LocalFolder c:\downloads Downloads all objects that match the specified key prefix to the local folder. The relative key hierarchy will be preserved as subfolders in the overall download location.Related...
If you have any questions during development, post them on the Issues page of GitHub.This API uploads a part for a specified multipart upload by copying data to a specifi
For some AVI, MOV, or MP4 files on Windows, using thereadFramefunction to read all of the frames in the file can result in a different number of frames from the value returned by theNumFramesproperty of theVideoReaderobject. Tips
Copy 0:003> .loadby sos mscorwks 0:003> !eeheap -gc Number of GC Heaps: 1 generation 0 starts at 0x013e35ec generation 1 starts at 0x013e1b6c generation 2 starts at 0x013e1000 ephemeral segment allocation context: none segment begin allocated size 0018f2d0 790d5588 790f4b38...
fields =3×1 cell{'x' } {'y' } {'title'} To return the values of the fields, use thestruct2cellfunction.struct2cellandfieldnamesreturn the values and the field names in the same order. values = struct2cell(S) values=3×2 cell array{[ 0 0.0635 0.1269 0.1904 0.2539 0.3173 0.3808 ...
publicstringname;publicdoubleSize {set{ ... }; }publiccharthis[inti] {set{ ... }; }publicstringthis[charc,inti] {set{ ... }; } Object Initializers with anonymous types Although object initializers can be used in any context, they're especially useful in LINQ query expressions...
Target object does not reside in the same data center as source object 问题原因:不支持跨地域拷贝文件。 解决方案:仅支持拷贝同一地域下相同或不同存储空间(Bucket)之间的文件(Object)。详情请参见CopyObject。 Query string authentication requires the Signature, Expires and OSSAccessKeyId parameters ...