题
我正在编写使用NSURLS的可可应用程序 - 我需要删除URL的片段部分(#blah部分)。
例子: http://example.com/#blah 应该最终成为 http://example.com/
我在WebCore中发现了一些代码,这些代码似乎是通过使用CFURL功能来完成的,但是它从未找到URL中的片段部分。我已经将其封装在扩展类别中:
-(NSURL *)urlByRemovingComponent:(CFURLComponentType)component {
CFRange fragRg = CFURLGetByteRangeForComponent((CFURLRef)self, component, NULL);
// Check to see if a fragment exists before decomposing the URL.
if (fragRg.location == kCFNotFound)
return self;
UInt8 *urlBytes, buffer[2048];
CFIndex numBytes = CFURLGetBytes((CFURLRef)self, buffer, 2048);
if (numBytes == -1) {
numBytes = CFURLGetBytes((CFURLRef)self, NULL, 0);
urlBytes = (UInt8 *)(malloc(numBytes));
CFURLGetBytes((CFURLRef)self, urlBytes, numBytes);
} else
urlBytes = buffer;
NSURL *result = (NSURL *)CFMakeCollectable(CFURLCreateWithBytes(NULL, urlBytes, fragRg.location - 1, kCFStringEncodingUTF8, NULL));
if (!result)
result = (NSURL *)CFMakeCollectable(CFURLCreateWithBytes(NULL, urlBytes, fragRg.location - 1, kCFStringEncodingISOLatin1, NULL));
if (urlBytes != buffer) free(urlBytes);
return result ? [result autorelease] : self;
}
-(NSURL *)urlByRemovingFragment {
return [self urlByRemovingComponent:kCFURLComponentFragment];
}
这样可以使用:
NSURL *newUrl = [[NSURL URLWithString:@"http://example.com/#blah"] urlByRemovingFragment];
不幸的是,Newurl最终成为”http://example.com/#blah“因为urlbyremovingComponent中的第一行总是返回kcfnotfound
我很难过。有更好的方法吗?
工作代码,感谢NALL
-(NSURL *)urlByRemovingFragment {
NSString *urlString = [self absoluteString];
// Find that last component in the string from the end to make sure to get the last one
NSRange fragmentRange = [urlString rangeOfString:@"#" options:NSBackwardsSearch];
if (fragmentRange.location != NSNotFound) {
// Chop the fragment.
NSString* newURLString = [urlString substringToIndex:fragmentRange.location];
return [NSURL URLWithString:newURLString];
} else {
return self;
}
}
解决方案
这个怎么样:
NSString* s = @"http://www.somewhere.org/foo/bar.html/#label";
NSURL* u = [NSURL URLWithString:s];
// Get the last path component from the URL. This doesn't include
// any fragment.
NSString* lastComponent = [u lastPathComponent];
// Find that last component in the string from the end to make sure
// to get the last one
NSRange fragmentRange = [s rangeOfString:lastComponent
options:NSBackwardsSearch];
// Chop the fragment.
NSString* newURLString = [s substringToIndex:fragmentRange.location + fragmentRange.length];
NSLog(@"%@", s);
NSLog(@"%@", newURLString);
其他提示
这是一个非常古老的问题,并且已经回答了,但是对于另一个简单的选择,这是我的做法:
NSString* urlAsString = [myURL absoluteString];
NSArray* components = [urlAsString componentsSeparatedByString:@"#"];
NSURL* myURLminusFragment = [NSURL URLWithString: components[0]];
如果没有碎片,urlminusfragment将与myurl相同
Swift 3.0
这将消除片段
if let fragment = url.fragment{
url = URL(string: url.absoluteString.replacingOccurrences(of: "#\(fragment)", with: "")!
}
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