Question

我从Web服务获取一个字符串，如： @“当前地址是Narveer Tanaji Malusare Road，Dandekar Pool，Dattavadi，Pune，Maharashtra 411030，India”。现在我想在第三个逗号后删除字符串，所以地址将如下所示： @“当前地址是Narveer Tanaji Malusare Road，Dandekar Pool，Dattavadi”; 并删除第三个逗号。请帮帮我。

谢谢

Answer 1

使用componentsSeparatedByString：

NSString *list = @"current address is Narveer Tanaji Malusare Road, Dandekar Pool, Dattavadi, Pune, Maharashtra 411030, India";
NSArray *listItems = [list componentsSeparatedByString:@","];

// produces an array { @"Karin", @"Carrie", @"David"" }.

//这里检查listItems.count＆gt; = 3

NSString* reducedString = [NSString stringWithFormat:@"%@, %@, %@",[listItems objectAtIndex:0],[listItems objectAtIndex:1],[listItems objectAtIndex:2] ];

Answer 2

您可以使用基本的NSString方法实现您想要的效果。

我刚刚写了一个方法，它正是你所要求的：

-(NSString *) clearStringAfterThirdComma: (NSString *) originalString {

    NSMutableString *clearedString = [originalString mutableCopy];

    NSInteger commaCount = 0;

    // iterate thru each character of the string

    for (NSInteger i = 0; i < originalString.length; i++) {

        NSString *subString = [originalString substringWithRange:NSMakeRange(i, 1)];

        if ([subString isEqualToString:@","]) {

            commaCount++;

            if (commaCount == 3) {
                [clearedString deleteCharactersInRange:NSMakeRange(i, originalString.length - i)];
                break;
            }
        }
    }

    return clearedString;
}

Answer 3

我知道这已经得到了解答，但这让我感到困扰，所以这是我的解决方案;

以下是方法：

- (NSString *)shortenedAddress:(NSString *)address {
    // Turn the string into an array of each part separated by a comma
    NSArray *components = [address componentsSeparatedByString:@","];

    // No need to shorten the address if there are three items or less
    if ([components count] < 4) {
        return address;
    }

    // Create a range object for the first three items in the array
    NSRange range;
    range.location = 0;
    range.length = 3;

    return [[components subarrayWithRange:range] componentsJoinedByString:@","];
}

如果你用它测试它：

NSString *fullAddress = @"current address is Narveer Tanaji Malusare Road, Dandekar Pool, Dattavadi, Pune, Maharashtra 411030, India"; // More than three items
NSString *partialAddress = @"current address is Narveer Tanaji Malusare Road, Dandekar Pool"; // Less than three items

NSLog(@"Full Address: %@", [self shortenedAddress:fullAddress]);
NSLog(@"Partial Address: %@", [self shortenedAddress:partialAddress]);

它在控制台中提供以下输出：

Full Address: current address is Narveer Tanaji Malusare Road, Dandekar Pool, Dattavadi

Partial Address: current address is Narveer Tanaji Malusare Road, Dandekar Pool

我认为它比接受的答案更短，更容易理解，更容易修改，但这只是我的意见。

如何从iOS中的字符串中的第三个逗号（，）后删除字符串？

3 个答案: