objective-c – UIApplication openURL：不适用于相对URL

这是代码：

NSURL *newsUrl = [NSURL URLWithString:@"/Document/News/1593" relativeToURL:[NSURL URLWithString:@"http://exist.ru"]];

// Outputs "http://exist.ru/Document/News/1593"
NSLog(@"%@",[newsUrl absoluteString]);

// works
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[newsUrl absoluteString]]];

// doesn't work
//[[UIApplication sharedApplication] openURL:newsUrl];

这是Apple的错误吗？

解决方法

在我的NSLog的Xcode输出中(@“NEW％@”,newsUrl)我将newUrl声明为

NSURL *newsUrl = [NSURL URLWithString:@"/Document/News/1593" relativeToURL:[NSURL URLWithString:@"http://exist.ru"]]:

NSLog输出是

/Document/News/1593 -- http://exist.ru

但对于[newsUrl absoluteString]

NSLog输出是

http://exist.ru/Document/News/1593

所以我猜[URLWithString：relativeToURL：]正在以不同的格式提供URL.这是您的结果无效的原因.