iphone - NSURL 到 NSString

Question

我使用此函数从字符串中获取 URL，但我怎样才能将其取回？

- (NSString *)urlEncodeUsingEncoding:(NSStringEncoding)encoding forString:(NSString *)string {
    string = (__bridge NSString *)CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)string, NULL, (CFStringRef)@"!*'\"();:@&=+$,/?%#[]% ", CFStringConvertNSStringEncodingToEncoding(encoding));
    return string;
}

Answer 1

[string stringByReplacingPercentEscapesUsingEncoding:NSUTF8Encoding];

顺便提一句。如果NSURL用于文件 url，请务必使用[url path]来获取未转义的路径字符串，而不是通过[url absoluteString].

Answer 2

采用

NSString *urlString = [url absoluteString];

以此目的。

Answer 3

使用此代码..

NSError* error = nil;
NSString* text = [NSString stringWithContentsOfURL:your_url encoding:NSASCIIStringEncoding error:&error];

这可能会帮助你

Answer 4

我自己找到了答案：

- (NSString *)decodedURLString {
    NSString *string = (__bridge NSString*)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault,
                                                                                          (CFStringRef)self,
                                                                                          CFSTR(""),
                                                                                          CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));

    return string;
}

和编码：

- (NSString *)encodedURLString {
    NSString *string = (__bridge NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                                                           (CFStringRef)self,
                                                                           NULL,
                                                                           CFSTR(":/=,!$&'()*+;[]@#?"),
                                                                           CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));

    return string;
}