CODEWITHSUNDEEP
objective-cnsstring
Amarjeet Karam
Amarjeet Karam

Reputation: 3

How to change or reverse the position of words in a String object in Objective C?

Like for example : To Create a string object with string "Welcome to objective-C" and then to Print the string in as "objective-C to Welcome" This should work for any string. Please help. Thanks :)

Upvotes: 0

Views: 3270

Answers (3)

NitinLandge
NitinLandge

Reputation: 11

NSString *myStr = @"India is my Country";

NSArray* array= [myStr componentsSeparatedByString:@" " ];
NSArray* reversedArray = [[array reverseObjectEnumerator] allObjects];
NSLog(@"%@",reversedArray);

NSString * result = [reversedArray componentsJoinedByString:@" "];
NSLog(@"%@",result);

Upvotes: 0

dombesz
dombesz

Reputation: 7899

Here you go. Not the most efficient solution but does his work.

NSString *myString = @"This is a test";
NSArray *myWords = [myString componentsSeparatedByString:@" "];
// myWords is now: [@"This", @"is", @"a", @"test"]
NSMutableArray *reversed = [NSMutableArray arrayWithCapacity:[myWords count]];
NSEnumerator *enumerator = [myWords reverseObjectEnumerator];
for (id element in enumerator) {
    [reversed addObject:element];
}
NSString *reverseString = [reversed componentsJoinedByString:@" "];
NSLog(@"%@", reverseString);

If you have any question let me know.

Update

You can try just a simple for cycle. Like this.

NSString *myString = @"This is a test";
NSArray *myWords = [myString componentsSeparatedByString:@" "];
NSMutableString* theString = [NSMutableString string];
for (int i=[myWords count]-1; i>=0;i--){
    [theString appendFormat:@"%@ ", [myWords objectAtIndex:i]];
}

Upvotes: 4

Viraj
Viraj

Reputation: 1890

Possibly, I think you should read a string till you encounter a space and store it in array and then use- (void)exchangeObjectAtIndex:(NSUInteger)idx1 withObjectAtIndex:(NSUInteger)idx2

Upvotes: 0

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