iphone - 连接字符串时插入逗号的问题

Question

在我的应用程序中，我有一个地址标签，其中包含"address1"、 "Address2"、"City"和"state"的值。在标签中显示时，我需要在每个值之间插入逗号。

但是，如果一个字符串没有值（比如"Address2"），则不应在此处插入唯一的逗号。

谁可以帮我这个事？

Answer 1

这里考虑这dictLocation是一个包含 Address1、Address2、City、State、Country 和 Zip 的字典：

样品dictLocation：

NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:@"add1", @"Address1", @"add2", @"Address2",@"cityname",@"City",@"state",@"StateName",@" country",@"CountryName",@"350010",@"ZipCode",nil];

代码：

-(NSMutableString *)createLocationAddress:(NSDictionary *)dictLocation
{
    NSMutableString *strAddress = [[NSMutableString alloc] initWithString:@""];

    NSString *strStreetAddress1 = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"Address1"] != nil)
    {
        strStreetAddress1 = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"Address1"]];
    }

    [strAddress appendString:strStreetAddress1];


    NSString *strAddress2 = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"Address2"] != nil)
    {
        strAddress2 = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"Address2"]];
    }

    if(![strAddress2 isEqualToString:@""])
    {
        if(![strAddress isEqualToString:@""])
            [strAddress appendString:@", "];
        [strAddress appendString:strAddress2];
    }


    NSString *strLocationCity = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"City"] != nil)
    {
        strLocationCity = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"City"]];
    }

    if(![strLocationCity isEqualToString:@""])
    {
        if(![strAddress isEqualToString:@""])
            [strAddress appendString:@", "];
        [strAddress appendString:strLocationCity];
    }

    NSString *strLocationState = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"StateName"] != nil)
    {
        strLocationState = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"StateName"]];
    }

    if(![strLocationState isEqualToString:@""])
    {
        if(![strAddress isEqualToString:@""])
            [strAddress appendString:@",\n"];
        [strAddress appendString:strLocationState];
    }

    NSString *strLocationCountry = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"CountryName"] !=nil)
    {
        strLocationCountry = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"CountryName"]];
    }

    if(![strLocationCountry isEqualToString:@""])
    {
        if(![strAddress isEqualToString:@""])
            [strAddress appendString:@", "];
        [strAddress appendString:strLocationCountry];
    }

    NSString *strLocationZipcode = @"";
    if(dictLocation != nil && [dictLocation valueForKey:@"ZipCode"] != nil)
    {
        strLocationZipcode = [StringUtility trimWhiteSpaceAndNewLine:[dictLocation valueForKey:@"ZipCode"]];
    }

    if(![strLocationZipcode isEqualToString:@""])
    {
        if(![strAddress isEqualToString:@""])
            [strAddress appendString:@", "];
        [strAddress appendString:strLocationZipcode];
    }

    return strAddress;

}

希望这可以帮助。

如果您需要其他任何东西，请告诉我