相关疑难解决方法(0)

我有一个NSString含有一个URL并且当我分配NSURL与NSString,NSURL输出(空).这是因为url中存在一些非法字符,NSURL如果不对NSString包含url的编码进行编码,则无法读取.

NSString *u = [incomingUrlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURL *url = [NSURL URLWithString:u];

NSLog(@"INCOMINGURLSTRING: %@" , u);
NSLog(@"URL: %@" , url);

输出是:

 INCOMINGURLSTRING: /url/path/fileName_blå.pdf
 URL: (null)

incomingUrlString包含挪威语字母"å",我认为这是存在的原因NSURL(null)

我也试过这个:

NSString *trimmedString = [file stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *encodedString = (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)trimmedString, NULL, (CFStringRef)@"!*'\"();:@&=+$,/?%#[]% ", kCFStringEncodingUTF8);

NSLog(@"TRIMMEDSTRING: %@" , trimmedString);
NSLog(@"ENCODEDSTRING: %@" , [encodedString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]);

NSURL *url = [NSURL URLWithString:encodedString];

NSLog(@"URL: %@" , url);

这里的输出是:

 TRIMMEDSTRING: /url/path/fileName_blå.pdf
 ENCODEDSTRING: /url/path/fileName_blå.pdf
 URL: %2Furl%2FPath%2FfileName_bl%C3%A5.pdf

我的目标是将URL加载到 …