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How to extract Image URL using REGEX (NSRegularExpression) in IOS !

How to extract Image URL using REGEX (NSRegularExpression) in IOS !

1	How to extract Image URL using REGEX (NSRegularExpression) in IOS !

Sometimes its very difficult to find image link from an html string. if you have already html strings the us the below sample to extract images SAMPLE-1

NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:&amp;error];
NSArray *matchs = [regex matchesInString:item.summary options:0 range:rangeOfString];
if (matchs.count==0)
{
NSRegularExpression* regex1 = [NSRegularExpression regularExpressionWithPattern:@"(?i)\\b((?:[a-z][\\w-]+:(?:/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()&lt;&gt;]+|\\(([^\\s()&lt;&gt;]+|(\\([^\\s()&lt;&gt;]+\\)))*\\))+(?:\\(([^\\s()&lt;&gt;]+|(\\([^\\s()&lt;&gt;]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,&lt;&gt;?«»“”‘’]))" options:NSRegularExpressionCaseInsensitive error:NULL];
matchs = [regex1 matchesInString:item.summary options:0 range:rangeOfString];
}
for (NSTextCheckingResult* match in matchs)
{
Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];
NSString* path =Imagestring;
NSString* extension = [path pathExtension];
if ([extension isEqualToString:@"jpg"])
{
Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];
myflag=false;
break;
}
else if ([extension isEqualToString:@"png"])
{
Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];
myflag=false;
break;

}


}

NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:&error];

NSArray *matchs = [regex matchesInString:item.summary options:0 range:rangeOfString];

if (matchs.count==0)

{

NSRegularExpression* regex1 = [NSRegularExpression regularExpressionWithPattern:@"(?i)\\b((?:[a-z][\\w-]+:(?:/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,<>?«»“”‘’]))" options:NSRegularExpressionCaseInsensitive error:NULL];

matchs = [regex1 matchesInString:item.summary options:0 range:rangeOfString];

}

for (NSTextCheckingResult* match in matchs)

{

Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];

NSString* path =Imagestring;

NSString* extension = [path pathExtension];

if ([extension isEqualToString:@"jpg"])

{

Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];

myflag=false;

break;

}

else if ([extension isEqualToString:@"png"])

{

Imagestring=[item.summary substringWithRange:[match rangeAtIndex:1]];

myflag=false;

break;

}

…

IOS, Objective-c

Asynchronous Operations in iOS with Grand Central Dispatch

Some times while you read the news from any news app the images related to that articles downloads slowly but before that you can read the news articles, this can…

IOS, Objective-c, Programming

How to call global method with parameters or arguments in IOS !!!

How to call global method with parameters or arguments in IOS

//SINGLETONCLASS.H
#import &lt;Foundation/Foundation.h&gt;
#import &lt;UIKit/UIKit.h&gt;
#import 

static NSString *databaseName1;
static NSString *databasePath1;
static sqlite3 *contactDB1;

@interface mysingleton : NSObject
{


//DATABASE STARTS

NSString *databaseName;
NSString *databasePath;
sqlite3 *contactDB;
NSMutableArray *nlatest;
}

@property (nonatomic, retain) NSString *databaseName;

@property (nonatomic, retain) NSString *databasePath;


+ (mysingleton *)sharedInstance;

+ (mysingleton * ) LoggErrors : (NSString *) string1 :(NSString *) string2 :(NSString*) string3;

@end


//SINGLETONCLASS.M

#import "mySingleton.h"

@implementation mysingleton

+ (mysingleton *)sharedInstance {
static dispatch_once_t once;
static mysingleton *instance;
dispatch_once(&amp;once, ^{
instance = [[mysingleton alloc] init];
});
return instance;
}


- (id)init
{
if (self = [super init])
{

}
}

+ (mysingleton *)LoggErrors :(NSString*) string1 :(NSString*) string2 :(NSString*) string3
{
NSString *docsDir;
NSArray *dirPaths;

// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

docsDir = [dirPaths objectAtIndex:0];


// Build the path to the database file
databasePath1 = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @“testDB.db"]];

NSFileManager *filemgr = [NSFileManager defaultManager];

if ([filemgr fileExistsAtPath: databasePath1 ] == YES)
{
const char *dbpath = [databasePath1 UTF8String];

if (sqlite3_open(dbpath, &amp;contactDB1) == SQLITE_OK)
{
char *errMsg;

//INSERT DATA INTO LEVEL TABLE



}
}
sqlite3_close(contactDB1);


return nil;


}


@end

//ANY OTHERCLASS WHERE YOU WANT TO CALL THIS SINGLETON METHOD


//MYTESTCLASS
#import “testclass.h”
#import "mysingleton.h"


@interface testclass ()

@end

@implementation testclass

-(void)mymethod
{

NSString *string1=@“Somestring1”;
NSString *string2=@“Somestring2”;
NSString *string3=@“Somestring3”;

[mysingleton LoggErrors:string1 :string2 :string3 ] ;

}

@end

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//SINGLETONCLASS.H

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

#import

static NSString *databaseName1;

static NSString *databasePath1;

static sqlite3 *contactDB1;

@interface mysingleton : NSObject

{

//DATABASE STARTS

NSString *databaseName;

NSString *databasePath;

sqlite3 *contactDB;

NSMutableArray *nlatest;

}

@property (nonatomic, retain) NSString *databaseName;

@property (nonatomic, retain) NSString *databasePath;

+ (mysingleton *)sharedInstance;

+ (mysingleton * ) LoggErrors : (NSString *) string1 :(NSString *) string2 :(NSString*) string3;

@end

//SINGLETONCLASS.M

#import "mySingleton.h"

@implementation mysingleton

+ (mysingleton *)sharedInstance {

static dispatch_once_t once;

static mysingleton *instance;

dispatch_once(&once, ^{

instance = [[mysingleton alloc] init];

});

return instance;

}

- (id)init

{

if (self = [super init])

{

}

+ (mysingleton *)LoggErrors :(NSString*) string1 :(NSString*) string2 :(NSString*) string3

{

NSString *docsDir;

NSArray *dirPaths;

// Get the documents directory

dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

docsDir = [dirPaths objectAtIndex:0];

// Build the path to the database file

databasePath1 = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @“testDB.db"]];

NSFileManager *filemgr = [NSFileManager defaultManager];

if ([filemgr fileExistsAtPath: databasePath1 ] == YES)

{

const char *dbpath = [databasePath1 UTF8String];

if (sqlite3_open(dbpath, &contactDB1) == SQLITE_OK)

{

char *errMsg;

//INSERT DATA INTO LEVEL TABLE

}

sqlite3_close(contactDB1);

return nil;

}

@end

//ANY OTHERCLASS WHERE YOU WANT TO CALL THIS SINGLETON METHOD

//MYTESTCLASS

#import “testclass.h”

#import "mysingleton.h"

@interface testclass ()

@end

@implementation testclass

-(void)mymethod

{

NSString *string1=@“Somestring1”;

NSString *string2=@“Somestring2”;

NSString *string3=@“Somestring3”;

[mysingleton LoggErrors:string1 :string2 :string3 ] ;

}

@end

IOS, Objective-c

What is Reference Count in Objective-C’s Memory Management.

This is Objective-C Memory technique which holds number of counts which is handling by Object. i.e one object is holding how many reference are count value. When we are allocating…

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Methods of NSString in IOS !!!

NSString is a predefine class available in Foundation Framework. 1)stringWithString – By using this we can create a string object with another string content.(class method). 2)Length – By Using this…

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UITextField and its Properties in IOS ?

By using this view we can place single line text content. When we are working UITextfield we require to implement UITextfieldDelegate methods. When we are editing UITextfield data then automatically…

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What is Delegate Means in Objective-C (IOS Application Development)

A delegate allows one object to send messages to another object when an event happens. For example, if you’re downloading data from a web site asynchronously using the NSURLConnection class.…

IOS, Objective-c

Fundamentals of Objective-C !!!

Objective-C is a general purpose high level Object Oriented programming language. Objective-C programming language designed by using C and Smalltalk-80 programming language. Objective-C programming language follows smalltalk message passing style(syntax)…

Objective-c

Singleton Class sample

//.h file should contain + (MySingleton *)sharedInstance; //.m file must declare as below + (MySingleton *)sharedInstance { static dispatch_once_t once; static MySingleton *instance; dispatch_once(&once, ^{ instance = [[MySingleton alloc]…

IOS, Objective-c

Tips for Bounds and Frames in IOS

The bounds of an UIView is the rectangle, expressed as a location (x,y) and size (width,height) relative to its own coordinate system (0,0). The frame of an UIView is the…

MyCodeTips

Category: Objective-c

How to extract Image URL using REGEX (NSRegularExpression) in IOS !

Asynchronous Operations in iOS with Grand Central Dispatch

How to call global method with parameters or arguments in IOS !!!

What is Reference Count in Objective-C’s Memory Management.

Methods of NSString in IOS !!!

UITextField and its Properties in IOS ?

What is Delegate Means in Objective-C (IOS Application Development)

Fundamentals of Objective-C !!!

Singleton Class sample

Tips for Bounds and Frames in IOS

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