NSString category to get all URLs from a string Returns a NSArray of NSURLs `NSArray <NSURL *> *`

NSString+URLsFromString.h

//
// NSString+URLsFromString.h
//
@interface NSString (URLsFromString)

+ (NSArray <NSURL*> *)URLsFromString:(NSString *)string;
- (NSArray <NSURL*> *)URLs;

@end

NSString+URLsFromString.m

//
// NSString+URLsFromString.m
//
@implementation NSString (URLsFromString)

+ (NSArray <NSURL*> *)URLsFromString:(NSString *)string {
	NSMutableArray<NSURL *> *URLs = [NSMutableArray new];
 
	if (string.length) {
 
		NSString *pattern = @"https?://([-\\w\\.]+)+(:\\d+)?(/([\\w/_\\.]*(\\?\\S+)?)?)?";
		NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
		NSArray *matches = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
 
		for (NSTextCheckingResult *match in matches) {
			NSString* substring = [string substringWithRange:match.range];
 
			NSURL *candidateURL = [NSURL URLWithString:substring];
			if (candidateURL && candidateURL.scheme && candidateURL.host) {
				[URLs addObject:candidateURL];
			}
		}
	}
	
	return URLs;
}

- (NSArray <NSURL*> *)URLs {
	NSMutableArray<NSURL *> *URLs = [NSMutableArray new];

	if (self.length) {

		NSString *pattern = @"https?://([-\\w\\.]+)+(:\\d+)?(/([\\w/_\\.]*(\\?\\S+)?)?)?";
		NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:NSRegularExpressionCaseInsensitive error:nil];
		NSArray *matches = [regex matchesInString:self options:0 range:NSMakeRange(0, [self length])];

		for (NSTextCheckingResult *match in matches) {
			NSString* substring = [self substringWithRange:match.range];

			NSURL *candidateURL = [NSURL URLWithString:substring];
			if (candidateURL && candidateURL.scheme && candidateURL.host) {
				[URLs addObject:candidateURL];
			}
		}
	}
	
	return URLs;
}

@end