Get last path part from NSString

问题

Hi all i want extract the last part from string which is a four digit number '03276' i:e http://www.abc.com/news/read/welcome-new-gig/03276

how can i do that.

回答1:

You can also use

NSString *sub = [@"http://www.abc.com/news/read/welcome-new-gig/03276" lastPathComponent];

回答2:

If you know how many characters you need, you can do something like this:

NSString *string = @"http://www.abc.com/news/read/welcome-new-gig/03276";
NSString *subString = [string substringFromIndex:[string length] - 5];

If you just know that it's the part after the last slash, you can do this:

NSString *string = @"http://www.abc.com/news/read/welcome-new-gig/03276";
NSString *subString = [[string componentsSeparatedByString:@"/"] lastObject];

回答3:

Since *nix uses the same path separators as URL's this will be valid as well.

[@"http://www.abc.com/news/read/welcome-new-gig/03276" lastPathComponent]

回答4:

If you know the length of the number, and it's not gonna change, it can be as easy as:

NSString *result = [string substringFromIndex:[string length] - 4];

回答5:

If the last part of the string is always the same length (5 characters) you could use this method to extract the last part:

- (NSString *)substringFromIndex:(NSUInteger)anIndex

Use the length of the string to determine the start index.

Something like this:

NSString *inputStr = @"http://www.abc.com/news/read/welcome-new-gig/03276";
NSString *newStr = [inputStr substringFromIndex:[inputStr length]-5];
NSLog(@"These are the last five characters of the string: %@", newStr);

(Code not tested)

回答6:

NSString *str = @"http://www.abc.com/news/read/welcome-new-gig/03276";  
NSArray *arr = [str componentSeparatedBy:@"gig/"];  
NSString *strSubStringDigNum = [arr objectAtIndex:1];  

strSubStringDigNum will have the value 03276

回答7:

Try this:

NSString *myUrl = @"http://www.abc.com/news/read/welcome-new-gig/03276";

NSString *number = [[myUrl componentsSeparatedByString:@"/"] objectAtIndex: 5];

来源：https://stackoverflow.com/questions/6440187/get-last-path-part-from-nsstring