Dark Horse programmer-ios notes-foundation nsstring, Nsarray

Below I pass a programming question: Calculate the code line number of the file, summarize the use method of NSString, Nsarray.

#import <Foundation/Foundation.h>

/*

Path: The full path of the file (may be a folder, or it may be a file)

return value int: line of code

*/

Nsuintegercodelinecount (NSString *path)

{

1. Get the File Manager

Nsfilemanager *mgr = [Nsfilemanagerdefaultmanager];

2. Whether the tag is a folder

BOOL dir = NO; Whether the tag is a folder

Mark if this path exists

BOOL exist = [Mgrfileexistsatpath:path isdirectory:&dir];

3. If not present, return directly to 0

if (!exist)

{

NSLog (@ "file path does not exist!) ");

return 0;

}

The code can come and show that the path exists

if (dir)

{//Folder

Get all contents (folders, files) under the current folder path

Nsarray *array = [Mgrcontentsofdirectoryatpath:path Error:nil];

Define a variable to hold the total number of all files in the path

int count = 0;

Iterate through the names of all the sub-Files (folders) in the array

For (nsstring *filenamein Array)

{

Get the full path of the sub-file (clip)

NSString *fullpath = [nsstringstringwithformat:@ "%@/%@", path, filename];

Accumulate total rows per sub-path

Count + = Codelinecount (FullPath);

}

return count;

}

Else

{//File

Determine the extension name of the file (ignoring case)

NSString *extension = [[Pathpathextension] lowercasestring];

if (![ extensionisequaltostring:@ "H"]

&&! [extensionisequaltostring:@ "M"]

&&! [extensionisequaltostring:@ "C"])

{

The file extension is not H, and it's not m, and it's not C.

return 0;

}

Loading file contents

NSString *content = [Nsstringstringwithcontentsoffile:path encoding:nsutf8stringencoding error:nil];

Cut the contents of the file into each row

Nsarray *array = [contentcomponentsseparatedbystring:@ "\ n"];

Remove the/users/apple/desktop/ios exercise in front of the file path

Nsrange range = [path rangeofstring:@ "/users/apple/desktop/ios exercise"];

NSString *str = [path stringbyreplacingcharactersinrange:rangewithstring:@ "];

Print file path and number of lines

NSLog (@ "%@-%ld", str, array.count);

return array.count;

}

}

int main ()

{

Nsuinteger count = Codelinecount (@ "/users/apple/desktop/ios XI");

NSLog (@ "%ld", count);

return 0;

}

void Test ()

{

NSString *str = @ "Jack\nrose\njim\njake";

[Str writetofile:@ "/users/apple/desktop/abc.txt" atomically:YESencoding:NSUTF8StringEncoding Error:nil];

Nsarray *array = [str componentsseparatedbystring:@ "\ n"];

For (NSString *line in array)

{

NSLog (@ "%@", line);

}

int count =codelinecount (@ "/users/apple/desktop/ios Exercise/Code/FOUNDATION/MAIN.M");

NSLog (@ "count=%d", count);

}

Dark Horse programmer-ios notes-foundation nsstring, Nsarray