如何解析 mailto 请求?
'mailto:[email protected] /cdn-cgi/l/email-protection[email protected] /cdn-cgi/l/email-protection&subject=This%20is%20the%20subject&body=This%20is%20the%20body'
我想从这个 NSURL 中提取收件人、主题和正文。我应该怎么做 ?
Thanks
下面是一些代码,它将解析任何 URL 并返回一个字典,其中包含字典中的参数和关联对象。它适用于mailto
网址也是。
请注意:此代码假设您正在使用ARC!
@interface NSString (URLDecoding)
- (NSString *) URLDecodedString;
@end
@implementation NSString (URLDecoding)
- (NSString *) URLDecodedString {
NSString *result = (__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (__bridge CFStringRef)self, CFSTR(""), kCFStringEncodingUTF8);
return result;
}
@end
- (NSDictionary *) parameterDictionaryFromURL:(NSURL *)url {
NSMutableDictionary *parameterDictionary = [[NSMutableDictionary alloc] init];
if ([[url scheme] isEqualToString:@"mailto"]) {
NSString *mailtoParameterString = [[url absoluteString] substringFromIndex:[@"mailto:" length]];
NSUInteger questionMarkLocation = [mailtoParameterString rangeOfString:@"?"].location;
[parameterDictionary setObject:[mailtoParameterString substringToIndex:questionMarkLocation] forKey:@"recipient"];
if (questionMarkLocation != NSNotFound) {
NSString *parameterString = [mailtoParameterString substringFromIndex:questionMarkLocation + 1];
NSArray *keyValuePairs = [parameterString componentsSeparatedByString:@"&"];
for (NSString *queryString in keyValuePairs) {
NSArray *keyValuePair = [queryString componentsSeparatedByString:@"="];
if (keyValuePair.count == 2)
[parameterDictionary setObject:[[keyValuePair objectAtIndex:1] URLDecodedString] forKey:[[keyValuePair objectAtIndex:0] URLDecodedString]];
}
}
}
else {
NSString *parameterString = [url parameterString];
NSArray *keyValuePairs = [parameterString componentsSeparatedByString:@"&"];
for (NSString *queryString in keyValuePairs) {
NSArray *keyValuePair = [queryString componentsSeparatedByString:@"="];
if (keyValuePair.count == 2)
[parameterDictionary setObject:[[keyValuePair objectAtIndex:1] URLDecodedString] forKey:[[keyValuePair objectAtIndex:0] URLDecodedString]];
}
}
return [parameterDictionary copy];
}
以下是如何使用它:
NSURL *mailtoURL = [NSURL URLWithString:@"mailto:[email protected] /cdn-cgi/l/email-protection[email protected] /cdn-cgi/l/email-protection&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"];
NSDictionary *parameterDictionary = [self parameterDictionaryFromURL:mailtoURL];
NSString *recipient = [parameterDictionary objectForKey:@"recipient"];
NSString *subject = [parameterDictionary objectForKey:@"subject"];
NSString *body = [parameterDictionary objectForKey:@"body"];
EDIT:
我更新了代码以使用任何 URL,收件人现在位于字典中mailto
URLs.
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