来自NSString的子string
我正在使用NSString ，我想获得包含我的string的前20个字符的子string。 我怎样才能做到这一点？
你可以使用substringToIndex 。
NSString *mystring = @"This is a test message having more than 20 characters"; NSString *newString = [mystring substringToIndex:20]; NSLog(@"%@", newString);
NSString *str = @"123456789012345678901234"; NSString *subStr = [str substringWithRange:NSMakeRange(0, 20)];
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];
尝试这个
NSString *string = @"This is for testing substring from string"; NSInteger intIndex = 20; NSLog(@"%@", [string substringToIndex:intIndex]);
希望它可以帮助你..
检查下面：
NSString *strTmp = @"This is test string to check substring."; NSInteger intIdx = 20; NSLog(@"%@", [strTmp substringToIndex:intIdx]);
这对你有帮助。
干杯!