How do I check if a string contains another string in Objective-C?

Please use this code

<!-- language: lang-c -->

NSString *string = @"hello bla bla";
if ([string rangeOfString:@"bla"].location == NSNotFound)
{
NSLog(@"string does not contain bla");
}
else
{
NSLog(@"string contains bla!");
}

try this,

<!-- language: lang-c -->

NSString *string = @"test Data";
if ([[string lowercaseString] rangeOfString:@"data"].location == NSNotFound)
{
NSLog(@"string does not contain Data");
}
else
{
NSLog(@"string contains data!");
}

Best solution. As simple as this! If you want to find a word or
part of the string. You can use this code. In this example we are going to check if the value of word contains "acter".

NSString *word =@"find a word or character here";
if ([word containsString:@"acter"]){
NSLog(@"It contains acter");
} else {
NSLog (@"It does not contain acter");
}

Since this seems to be a high-ranking result in Google, I want to add this:

iOS 8 and OS X 10.10 add the [`containsString:`][1] method to `NSString`. An updated version of Dave DeLong's example for those systems:

NSString *string = @"hello bla bla";
if ([string containsString:@"bla"]) {
NSLog(@"string contains bla!");
} else {
NSLog(@"string does not contain bla");
}

[1]:

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In Swift 4:

let a = "Hello, how are you?"
a.contains("Hello") //will return true

With **iOS 8** and **Swift**, we can use `localizedCaseInsensitiveContainsString` method

let string: NSString = "Café"
let substring: NSString = "É"

string.localizedCaseInsensitiveContainsString(substring) // true

Use the option NSCaseInsensitiveSearch with rangeOfString:options:

NSString *me = @"toBe" ;
NSString *target = @"abcdetobe" ;
NSRange range = [target rangeOfString: me options: NSCaseInsensitiveSearch];
NSLog(@"found: %@", (range.location != NSNotFound) ? @"Yes" : @"No");
if (range.location != NSNotFound) {
// your code
}

Output result is found:Yes

The options can be "or'ed" together and include:

NSCaseInsensitiveSearch
NSLiteralSearch
NSBackwardsSearch and more

First string contain or not second string,

NSString *first = @"Banana";
NSString *second = @"BananaMilk";
NSRange range = [first rangeOfString:second options:NSCaseInsensitiveSearch];

if (range.length > 0) {
NSLog(@"Detected");
}
else {
NSLog(@"Not detected");
}

Try this:

**Swift 4.1 , 4.2:**

let stringData = "Black board"

//swift quick way and case sensitive
if stringData.contains("bla") {
print("data contains string");
}

//case sensitive
if stringData.range(of: "bla",options: .caseInsensitive) != nil {
print("data contains string");
}else {
print("data does not contains string");
}

**For Objective-C:**

NSString *stringData = @"Black board";

//Quick way and case sensitive
if ([stringData containsString:@"bla"]) {
NSLog(@"data contains string");
}

//Case Insensitive
if ([stringData rangeOfString:@"bla" options:NSCaseInsensitiveSearch].location != NSNotFound) {
NSLog(@"data contains string");
}else {
NSLog(@"data does not contain string");
}

**Swift 4 And Above**

let str = "Hello iam midhun"

if str.contains("iam") {
//contains substring
}
else {
//doesn't contain substring
}

**Objective-C**

NSString *stringData = @"Hello iam midhun";

if ([stringData containsString:@"iam"]) {
//contains substring
}
else {
//doesn't contain substring
}