URL validation category for NSString, including both ip and DNS address types.

NSString+URLValidate.m

//
//  Created by Calios on 2017-04-10.
//  Copyright © 2017 Calios. All rights reserved.
//

@implementation NSString (URLValidate)

- (BOOL)isValidURL
{
    if ([self isIPAddress]) {
        return [self isValidIPAddress];
    }
    return [self isValidDNSAddress];
}

- (BOOL)isValidDNSAddress {
    NSString *result = self;
    if (![self containsProtocol]) {
        result = [NSString stringWithFormat:@"http://%@",self];
    }
    NSString *urlRegEx =
    @"(http|https)://((\\w)*|([0-9]*)|([-|_])*)+([\\.|/]((\\w)*|([0-9]*)|([-|_])*))+(:[0-9]{1,})?";
    NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegEx];
    return [urlTest evaluateWithObject:result];
}

- (BOOL)isIPAddress {
    NSString *result = self;
    if ([self containsProtocol]) {
        result = [result componentsSeparatedByString:@"//"].lastObject;
    }
    NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:@"[a-zA-Z]" options:0 error:NULL];
    NSInteger matches = [regex numberOfMatchesInString:result options:0 range:NSMakeRange(0, result.length)];
    return (matches <= 0);
}

- (BOOL)isValidIPAddress {
    NSString *result = self;
    if ([self containsProtocol]) {
        result = [result componentsSeparatedByString:@"//"].lastObject;
    }
    NSString *ipRegEx = @"(\\d{1,3}\\.){3}(\\d){1,3}(:\\d{1,})?";
    NSPredicate *ipTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", ipRegEx];
    return [ipTest evaluateWithObject:result];
}

- (BOOL)containsProtocol {
    return [self hasPrefix:@"http://"] || [self hasPrefix:@"https://"];
}

@end

URLValidationTests.m

//
//  Created by Calios on 2017-04-10.
//  Copyright © 2017 Calios. All rights reserved.
//

#import <XCTest/XCTest.h>
#import "NSString+URLValidate.h"

@interface URLValidationTests : XCTestCase

@end

@implementation URLValidationTests

NSString *url1 = @"http://192.168.1.9";
NSString *url2 = @"http://192.168.1.9:1010";
NSString *url4 = @"192.168.1.9:1010";
NSString *url5 = @"192.168.1.9";
NSString *urlInvalid1 = @"http://192.168.1..9";
NSString *urlInvalid2 = @"192.168.1..9";
NSString *urlInvalid3 = @"http://192.168.1.9:101x";
NSString *urlInvalid4 = @"http://#(@*&%#@)$(*&%#@.com";

tring *url7 = @"http://office.shtdtech.com:28080";
NSString *url8 = @"http://office.shtdtech.com";
NSString *url9 = @"office.shtdtech.com";
NSString *url0 = @"office.shtdtech.com:48080";

- (void)setUp {
    [super setUp];
    // Put setup code here. This method is called before the invocation of each test method in the class.
}

- (void)tearDown {
    // Put teardown code here. This method is called after the invocation of each test method in the class.
    [super tearDown];
}

- (void)testValidIPAddress {
    XCTAssertTrue([url1 isValidIPAddress]);
    XCTAssertTrue([url2 isValidIPAddress]);
    XCTAssertTrue([url4 isValidIPAddress]);
    XCTAssertTrue([url5 isValidIPAddress]);
    XCTAssertFalse([urlInvalid1 isValidIPAddress]);
    XCTAssertFalse([urlInvalid2 isValidIPAddress]);
    XCTAssertFalse([urlInvalid3 isValidIPAddress]);
}

- (void)testValidDNSAddress {
    XCTAssertTrue([url6 isValidDNSAddress]);
    XCTAssertTrue([url7 isValidDNSAddress]);
    XCTAssertTrue([url8 isValidDNSAddress]);
    XCTAssertTrue([url9 isValidDNSAddress]);
    XCTAssertTrue([url0 isValidDNSAddress]);
    
    XCTAssertFalse([url6 isIPAddress]);
    XCTAssertFalse([url7 isIPAddress]);
    XCTAssertFalse([url8 isIPAddress]);
    XCTAssertFalse([url9 isIPAddress]);
    XCTAssertFalse([url0 isIPAddress]);
}

- (void)testValidURL {
    XCTAssertTrue([url1 isValidURL]);
    XCTAssertTrue([url2 isValidURL]);
    XCTAssertTrue([url4 isValidURL]);
    XCTAssertTrue([url5 isValidURL]);
    XCTAssertTrue([url6 isValidURL]);
    XCTAssertTrue([url7 isValidURL]);
    XCTAssertTrue([url8 isValidURL]);
    XCTAssertTrue([url9 isValidURL]);
    XCTAssertTrue([url0 isValidURL]);

    XCTAssertFalse([urlInvalid1 isValidURL]);
    XCTAssertFalse([urlInvalid2 isValidURL]);
    XCTAssertFalse([urlInvalid3 isValidURL]);
    XCTAssertFalse([urlInvalid4 isValidURL]);
}
@end

Add test case.