cocoa - 使用 Objective-C 进行字符串操作

Question

我有一个这样的字符串网址

"https://stackoverflow.com/questions/ 3260091/databases-and-deep-copy"

如何获取网址的倒数第二部分？

3260091

Answer 1

NSURL * url = [NSURL URLWithString:@"http://stackoverflow.com/questions/3260091/databases-and-deep-copy"];  //or however you get this url

NSString * path = [url path];
NSArray * components = [path pathComponents];

NSString * questionID = [components objectAtIndex:[components count]-2];