Substring from NSString [closed]

问题

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Closed 5 years ago.

I am using NSString and I want to get a substring of it that contains the first 20 characters of my string. How can I do that?

回答1:

You can use substringToIndex.

NSString *mystring = @"This is a test message having more than 20 characters";
NSString *newString = [mystring substringToIndex:20];
NSLog(@"%@", newString);

回答2:

NSString *str = @"123456789012345678901234";
NSString *subStr = [str substringWithRange:NSMakeRange(0, 20)];

回答3:

NSString *string = @"I am having a simple question.I am having NSString and i want a substring of it that contains first 20 ";
NSString *first20CharString = [string substringToIndex:20];

回答4:

Try this

NSString *string = @"This is for testing substring from string";
    NSInteger intIndex = 20;
    NSLog(@"%@", [string substringToIndex:intIndex]);

Hope it helps you..

回答5:

Check with below:

NSString *strTmp = @"This is test string to check substring.";
NSInteger intIdx = 20;
NSLog(@"%@", [strTmp substringToIndex:intIdx]);

It will be helpful to you.

Cheers!

来源：https://stackoverflow.com/questions/14767167/substring-from-nsstring