ios中對檔案的讀與寫

在ios中對檔案的操作，蘋果已經封裝好了一個類，開放了對應的IPA，對應的類為：NSFileManager，檔案管理類。

執行個體化：

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NSFileManager *manage = [NSFileManager defaultManager]; 

    NSFileManager *manage = [NSFileManager defaultManager];

建立一個檔案目錄

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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類型，直接判斷，建立是否成功。

如果給檔案寫入資料，如NSData，就可以：

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BOOL isWrite = [_data writeToFile:filepath atomically:YES]; 

BOOL isWrite = [_data writeToFile:filepath atomically:YES];

返回判斷，是否成功。

對檔案的拷貝：

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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);

轉移：

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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);

刪除：

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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);

檔案是否存在：

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- (BOOL)fileExistsAtPath:(NSString *)path; 

- (BOOL)fileExistsAtPath:(NSString *)path;

檔案是否能讀：

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- (BOOL)isReadableFileAtPath:(NSString *)path; 

- (BOOL)isReadableFileAtPath:(NSString *)path;