CODEWITHSUNDEEP
iphoneobjective-ciosstringnsstring
wOlVeRiNe
wOlVeRiNe

Reputation: 575

Separating a single string into two Different Strings in Objective-C

I am just starting off with Objective-C and iphone app dev, i'm trying to design a calculator app, the logic i have used is this : when the user clicks any button i take the title of the button by [sender titleForState:UIControlStateNormal] method and then go on appending it onto a string(NSString *result). say the user enters 123+456 , then in my string i will have "123+456", now i want two strings "123" and "456" so that i can add them by [result intValue] method.

So my question is, how do i get these two separate strings ("123" & "456")?

An example code with suitable methods would be very helpful.

Upvotes: 2

Views: 1959

Answers (4)

ymutlu
ymutlu

Reputation: 6715

Found this at NSString tokenize in Objective-C

Found this at http://borkware.com/quickies/one?topic=NSString (useful link):

NSString *string = @"oop:ack:bork:greeble:ponies";
NSArray *chunks = [string componentsSeparatedByString: @":"];

Hope this helps!

Adam

NSString *string = @"123+456";
NSArray *chunks = [string componentsSeparatedByString: @"+"];

int res = [[chunks objectAtIndex:0] intValue]+[[chunks objectAtIndex:1] intValue];

Upvotes: 2

Joe
Joe

Reputation: 57179

You can separate strings by using NSStrings componentsSeparatedByString:

NSString *calculation = @"1235+4362";
NSArray *results = [calculation componentsSeparatedByString:@"+"];

NSLog(@"Results: %@", results);

If you are attempting to implement a calculator you may want to familiarize yourself with Reverse Polish Notation and the Shunting-Yard Algorithm as you will find trying to create a simple calculator will be a bit more challenging than expected..

Upvotes: 1

Youssef
Youssef

Reputation: 3592

NSString * mystring = @"123+456";
NSArray * array = [mystring componentsSeparatedByString:@"+"];
NSString * str1 = [array objectAtIndex:0]; //123
NSString * str2 = [array objectAtIndex:1]; //456

Upvotes: 14

gcamp
gcamp

Reputation: 14662

NSArray* yourTwoStrings = [@"123+456" componentsSeparatedByString:@"+"];

Upvotes: 1

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