how to check NSString in NSMutableArray

Question

I want search (to check) one NSString in NSMutableArray. but I dont know about it.

    NSMutableArray *a = [[NSMutableArray alloc]initWithObjects:@"Marco",@"christian",@"hon",@"John",@"fred",@"asdas", nil];
    NSString *name = @"John";

I want to see is there name variable in a NSMutableArray variable ?

I'm voting to close this as too localized. The `containsObject:` function is listed as clear as daylight on the documentation page: https://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html — borrrden, May 30 '13 at 09:21

Nishant Tyagi · Accepted Answer · 2014-12-10T09:43:34.980

4

Use containsObject: method to check this :

NSMutableArray *a = [[NSMutableArray alloc]initWithObjects:@"Marco",@"christian",@"hon",@"John",@"fred",@"asdas", nil];
    NSString *name = @"John";
    if ([a containsObject:name]) {
        // Your array cotains that object
    }

Hope it helps you.

edited Dec 10 '14 at 09:43

answered May 30 '13 at 09:20

Nishant Tyagi

9,893
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score 1 · Answer 2 · answered May 30 '13 at 09:21

run a loop and check .

-(BOOL)array:(NSArray*)array containsString:(NSString*)name
{
    for(NSString *str in array)
    {
        if([name isEqualToString:str])
            return YES;
    }
    return NO;
}

In this way array find out object that it contains.

you can also use a single line

 [array containsObject:name]

score 1 · Answer 3 · answered May 30 '13 at 09:21

1

If you are also interested in the position of your element you can use

 - (NSUInteger)indexOfObject:(id)anObject

it will return NSNotFound if the object is not in the array, or the index of the object

answered May 30 '13 at 09:21

katzenhut

1,742
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score 1 · Answer 4 · answered May 30 '13 at 09:21

1

You can use the following code

if([a containsObject: name])
{
    //here your code
}

answered May 30 '13 at 09:21

manujmv

6,450
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score 0 · Answer 5 · answered May 30 '13 at 09:20

0

[a containsObject:name] This might help you.

answered May 30 '13 at 09:20

Desert Rose

3,376
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score 0 · Answer 6 · answered May 30 '13 at 09:27

I suggest you to use indexOfObject:. Because using this way you can not only check whether it exists but also get the index if it indeed exists.

NSMutableArray *array = [[NSMutableArray alloc] initWithObjects:@"Marco",@"christian",@"hon",@"John",@"fred",@"asdas", nil];
NSString *name = @"John";
NSInteger index = [array indexOfObject:name];
if (index != NSNotFound) {
    NSLog(@"Find name %@", name);
} else {
    NSLog(@"Name %@ not fount", name);
}

how to check NSString in NSMutableArray

6 Answers6