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15 changes: 15 additions & 0 deletions
15
Categories/Foundation/NSFileHandle/NSFileHandle+readLine.h
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| // | ||
| // NSFileHandle+readLine.h | ||
| // | ||
| // Created by Ethan Horger on 11/27/12. | ||
| // Copyright (c) 2012 Ethan Horger. All rights reserved. | ||
| // | ||
| // A Cocoa / Objective-C NSFileHandle category that adds the ability to read a file line by line. | ||
| //https://github.com/arbalest/NSFileHandle-readLine | ||
| #import <Foundation/Foundation.h> | ||
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| @interface NSFileHandle (readLine) | ||
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| - (NSData *)readLineWithDelimiter:(NSString *)theDelimier; | ||
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| @end |
93 changes: 93 additions & 0 deletions
93
Categories/Foundation/NSFileHandle/NSFileHandle+readLine.m
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| @@ -0,0 +1,93 @@ | ||
| // | ||
| // NSFileHandle+readLine.m | ||
| // | ||
| // Created by Ethan Horger on 11/27/12. | ||
| // Copyright (c) 2012 Ethan Horger. All rights reserved. | ||
| // | ||
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| #import "NSFileHandle+readLine.h" | ||
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| @implementation NSFileHandle (readLine) | ||
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| - (NSData *)readLineWithDelimiter:(NSString *)theDelimiter | ||
| { | ||
| NSUInteger bufferSize = 1024; // Set our buffer size | ||
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| // Read the delimiter string into a C string | ||
| NSData *delimiterData = [theDelimiter dataUsingEncoding:NSASCIIStringEncoding]; | ||
| const char *delimiter = [delimiterData bytes]; | ||
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| NSUInteger delimiterIndex = 0; | ||
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| NSData *lineData; // Our buffer of data | ||
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| unsigned long long currentPosition = [self offsetInFile]; | ||
| NSUInteger positionOffset = 0; | ||
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| BOOL hasData = YES; | ||
| BOOL lineBreakFound = NO; | ||
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| while (lineBreakFound == NO && hasData == YES) | ||
| { | ||
| // Fill our buffer with data | ||
| lineData = [self readDataOfLength:bufferSize]; | ||
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| // If our buffer gets some data, proceed | ||
| if ([lineData length] > 0) | ||
| { | ||
| // Get a pointer to our buffer's raw data | ||
| const char *buffer = [lineData bytes]; | ||
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| // Loop over the raw data, byte-by-byte | ||
| for (int i = 0; i < [lineData length]; i++) | ||
| { | ||
| // If the current character matches a character in the delimiter sequence... | ||
| if (buffer[i] == delimiter[delimiterIndex]) | ||
| { | ||
| delimiterIndex++; // Move to the next char of the delimiter sequence | ||
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| if (delimiterIndex >= [delimiterData length]) | ||
| { | ||
| // If we've found all of the delimiter characters, break out of the loop | ||
| lineBreakFound = YES; | ||
| positionOffset += i + 1; | ||
| break; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| // Otherwise, reset the current delimiter character offset | ||
| delimiterIndex = 0; | ||
| } | ||
| } | ||
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| if (lineBreakFound == NO) | ||
| { | ||
| positionOffset += [lineData length]; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| hasData = NO; | ||
| break; | ||
| } | ||
| } | ||
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| // Use positionOffset to determine the string to return... | ||
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| // Return to the start of this line | ||
| [self seekToFileOffset:currentPosition]; | ||
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| NSData *returnData = [self readDataOfLength:positionOffset]; | ||
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| if ([returnData length] > 0) | ||
| { | ||
| return returnData; | ||
| } | ||
| else | ||
| { | ||
| return nil; | ||
| } | ||
| } | ||
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| @end |
13 changes: 13 additions & 0 deletions
13
Demos/Foundation/NSFileHandle/NSFileHandleDemoViewController.h
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|---|---|---|
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| // | ||
| // NSFileHandleDemoViewController.h | ||
| // IOS-Categories | ||
| // | ||
| // Created by Jakey on 15/7/9. | ||
| // Copyright © 2015年 www.skyfox.org. All rights reserved. | ||
| // | ||
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| #import "BaseViewController.h" | ||
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| @interface NSFileHandleDemoViewController : BaseViewController | ||
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| @end |
55 changes: 55 additions & 0 deletions
55
Demos/Foundation/NSFileHandle/NSFileHandleDemoViewController.m
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| // | ||
| // NSFileHandleDemoViewController.m | ||
| // IOS-Categories | ||
| // | ||
| // Created by Jakey on 15/7/9. | ||
| // Copyright © 2015年 www.skyfox.org. All rights reserved. | ||
| // | ||
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| #import "NSFileHandleDemoViewController.h" | ||
| #import "NSFileHandle+readLine.h" | ||
| @interface NSFileHandleDemoViewController () | ||
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| @end | ||
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| @implementation NSFileHandleDemoViewController | ||
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| - (void)viewDidLoad { | ||
| [super viewDidLoad]; | ||
| // Do any additional setup after loading the view from its nib. | ||
| NSMutableArray *linesFound = [[NSMutableArray alloc] init]; | ||
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| // Open our demo file | ||
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| NSString *demoFilePath = [[NSBundle mainBundle] pathForResource:@"NSFileHandleSampleFile" ofType:@"txt"]; | ||
| NSFileHandle *demoFileHandle = [NSFileHandle fileHandleForReadingAtPath:demoFilePath]; | ||
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| // Use readLineWithDelimiter to fill our NSTableView with each line found | ||
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| NSData *lineData; | ||
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| while ((lineData = [demoFileHandle readLineWithDelimiter:@"\n"])) | ||
| { | ||
| NSString *lineString = [[NSString alloc] initWithData:lineData encoding:NSASCIIStringEncoding]; | ||
| NSLog(@"lineString:%@",lineString); | ||
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| [linesFound addObject:lineString]; | ||
| } | ||
| } | ||
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| - (void)didReceiveMemoryWarning { | ||
| [super didReceiveMemoryWarning]; | ||
| // Dispose of any resources that can be recreated. | ||
| } | ||
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| /* | ||
| #pragma mark - Navigation | ||
| // In a storyboard-based application, you will often want to do a little preparation before navigation | ||
| - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { | ||
| // Get the new view controller using [segue destinationViewController]. | ||
| // Pass the selected object to the new view controller. | ||
| } | ||
| */ | ||
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| @end |
19 changes: 19 additions & 0 deletions
19
Demos/Foundation/NSFileHandle/NSFileHandleDemoViewController.xib
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| <?xml version="1.0" encoding="UTF-8" standalone="no"?> | ||
| <document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES"> | ||
| <dependencies> | ||
| <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/> | ||
| </dependencies> | ||
| <objects> | ||
| <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="NSFileHandleDemoViewController"> | ||
| <connections> | ||
| <outlet property="view" destination="i5M-Pr-FkT" id="sfx-zR-JGt"/> | ||
| </connections> | ||
| </placeholder> | ||
| <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/> | ||
| <view clearsContextBeforeDrawing="NO" contentMode="scaleToFill" id="i5M-Pr-FkT"> | ||
| <rect key="frame" x="0.0" y="0.0" width="600" height="600"/> | ||
| <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/> | ||
| <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/> | ||
| </view> | ||
| </objects> | ||
| </document> |
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| @@ -0,0 +1,4 @@ | ||
| The quick yellow Pikachu | ||
| jumped over the lazy Snorlax | ||
| while the thirsty Lotad | ||
| carried water on his back! |
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