Objective-c：极其奇怪且烦人的字符串问题
我一直在开发一个表格视图程序，并且有一个函数可以处理来自用户首选项和核心数据的多个数据。程序解析这些东西并返回一个 url 地址。代码如下：
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSString *serverAdress = [prefs stringForKey:@"serverAdress"];
serverAdress = [serverAdress stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd.MM.yyyy"];
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc] init];
[dateFormatter2 setDateFormat:@"dd.MM.yyyy HH:mm"];
NSString *dateString = [dateFormatter stringFromDate:[NSDate date]];
NSString *dateTimeString = [NSString stringWithFormat:@"%@ %@",dateString,[dashboardParameters attribute1]];
NSTimeInterval dayInterval = [[dashboardParameters attribute2] intValue]*60*60*(-1);
NSDate *date2 = [[dateFormatter2 dateFromString:dateTimeString] addTimeInterval:dayInterval];
NSString *urlString =
[NSMutableString stringWithFormat:@"%@/webservices/service1.asmx/getHourlySales2?tarih2=%@&tarih1=%@&salesType=%@",
serverAdress,
dateTimeString,
[dateFormatter2 stringFromDate:date2],
[dashboardParameters itemOrder]
];
urlString = [urlString stringByReplacingOccurrencesOfString:@" " withString:@"%20"];
return urlString;
一切正常，我在检索数据方面没有问题。但是当我执行代码时，我得到以下日志输出：
//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi/webservices/service1.asmx/getHourlySales2 ?tarih2=21.01.2011%2022:00&tarih1=21.01.2011%2011:00&salesType=Hepsi
必须是
//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi
但奇怪的是程序添加了
/webservices/service1.asmx/getHourlySales2?tarih2=21.01.2011%2022:00&tarih1=21.01.2011%2011:00&salesType=Hepsi
正常处理后自行处理。
删除 NSString *serverAdress = [prefs stringForKey:@"serverAdress"] 并手动输入 serveradress 时，代码正常运行
另外一件重要的事情是，当我从代码中
。请帮助，程序中的所有内容都工作正常，但我遇到了这个问题。
谢谢你的帮助。
i've been working on a tableview program and i have a function that processes several data from user preferences, and core-data. the program parses these things and returns a url adress. heres the code:
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSString *serverAdress = [prefs stringForKey:@"serverAdress"];
serverAdress = [serverAdress stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd.MM.yyyy"];
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc] init];
[dateFormatter2 setDateFormat:@"dd.MM.yyyy HH:mm"];
NSString *dateString = [dateFormatter stringFromDate:[NSDate date]];
NSString *dateTimeString = [NSString stringWithFormat:@"%@ %@",dateString,[dashboardParameters attribute1]];
NSTimeInterval dayInterval = [[dashboardParameters attribute2] intValue]*60*60*(-1);
NSDate *date2 = [[dateFormatter2 dateFromString:dateTimeString] addTimeInterval:dayInterval];
NSString *urlString =
[NSMutableString stringWithFormat:@"%@/webservices/service1.asmx/getHourlySales2?tarih2=%@&tarih1=%@&salesType=%@",
serverAdress,
dateTimeString,
[dateFormatter2 stringFromDate:date2],
[dashboardParameters itemOrder]
];
urlString = [urlString stringByReplacingOccurrencesOfString:@" " withString:@"%20"];
return urlString;
Everything works great, i have no problem on retrieving data. But when i execute the code, i get this log output:
//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi/webservices/service1.asmx/getHourlySales2?tarih2=21.01.2011%2022:00&tarih1=21.01.2011%2011:00&salesType=Hepsi
it has to be
//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi
But strangely the program adds
/webservices/service1.asmx/getHourlySales2?tarih2=21.01.2011%2022:00&tarih1=21.01.2011%2011:00&salesType=Hepsi
by itself after the normal processing.
Also another important thing, the code runs normally when i remove
NSString *serverAdress = [prefs stringForKey:@"serverAdress"] from the code and enter serveradress manually.
Plase help , everything in the program works fine but im stuck with this problem.
Thanks for helping.
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那么，在将 serverAdress 添加到 urlString 之前， 中会包含哪些内容。看起来好像 serverAdress 包含 '//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi'
So what's in serverAdress before you add it to urlString. Looks as if serverAdress contains '//server.dyndns.org/webservices/service1.asmx/getHourlySales2?tarih2=20.01.2011%2016:00&tarih1=19.01.2011%2016:00&salesType=Hepsi'