ios中对文件的读与写

在ios中对文件的操作，苹果已经封装好了一个类，开放了对应的ipa，对应的类为：nsfilemanager，文件管理类。

实例化：

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nsfilemanager *manage = [nsfilemanager defaultmanager]; 

    nsfilemanager *manage = [nsfilemanager defaultmanager];

创建一个文件目录

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[manage createdirectoryatpath:direcatorypath withintermediatedirectories:yes attributes:nil error:nil]; 

        [manage createdirectoryatpath:direcatorypath withintermediatedirectories:yes attributes:nil error:nil];

返回bool类型，直接判断，创建是否成功。

如果给文件写入数据，如nsdata，就可以：

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bool iswrite = [_data writetofile:filepath atomically:yes]; 

bool iswrite = [_data writetofile:filepath atomically:yes];

返回判断，是否成功。

对文件的拷贝：

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- (bool)copyitematpath:(nsstring *)srcpath topath:(nsstring *)dstpath error:(nserror **)error ns_available(10_5, 2_0); 

- (bool)copyitematpath:(nsstring *)srcpath topath:(nsstring *)dstpath error:(nserror **)error ns_available(10_5, 2_0);

转移：

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- (bool)moveitematpath:(nsstring *)srcpath topath:(nsstring *)dstpath error:(nserror **)error ns_available(10_5, 2_0); 

- (bool)moveitematpath:(nsstring *)srcpath topath:(nsstring *)dstpath error:(nserror **)error ns_available(10_5, 2_0);

删除：

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- (bool)removeitematpath:(nsstring *)path error:(nserror **)error ns_available(10_5, 2_0); 

- (bool)removeitematpath:(nsstring *)path error:(nserror **)error ns_available(10_5, 2_0);

文件是否存在：

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- (bool)fileexistsatpath:(nsstring *)path; 

- (bool)fileexistsatpath:(nsstring *)path;

文件是否能读：

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- (bool)isreadablefileatpath:(nsstring *)path; 

- (bool)isreadablefileatpath:(nsstring *)path;