iphone - 使用 NSScanner 提取 NSString

Question

我正在从 AllContacts 获取数据；在该数据中，我得到了联系方式，例如 (998) 989-8989。使用此号码，我无法拨打电话。有人可以帮忙吗？提前致谢。

Answer 1

大家好

最后我用下面的代码来解决这个问题

NSString *originalString = @"(998) 989-8989";
NSMutableString *strippedString = [NSMutableString 
                                   stringWithCapacity:originalString.length];

NSScanner *scanner = [NSScanner scannerWithString:originalString];
NSCharacterSet *numbers = [NSCharacterSet 
                           characterSetWithCharactersInString:@"0123456789"];

while ([scanner isAtEnd] == NO) {
    NSString *buffer;
    if ([scanner scanCharactersFromSet:numbers intoString:&buffer]) {
        [strippedString appendString:buffer];

    } else {
        [scanner setScanLocation:([scanner scanLocation] + 1)];
    }
}

NSLog(@"%@", strippedString);

谢谢大家

Answer 2

听起来你可以删除空格、括号和连字符。

NSString *phoneNumber = @"(998) 989-8989";
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
phoneNumber = [@"tel://" stringByAppendingString:phoneNumber];
[[UIApplication sharedApplication] openURL:phoneNumber];