解析NSURL mailto [英] parse a NSURL mailto

问题描述

如何解析mailto请求？

How can I parse a mailto request ?

'mailto:[e-mail]?cc=[e-mail]&subject=This%20is%20the%20subject&body=This%20is%20the%20body'

从这个NSURL，我想提取收件人，主题和身体。我该怎么办？

From this NSURL, I want to extract the recipient, the subject and the body. How should I do ?

谢谢

推荐答案

这是一些代码将解析任何URL并返回带有参数和字典中相关对象的字典。它适用于 mailto 网址。

请注意：此代码假设您使用的是 ARC ！

Here is some code that will parse any URL and return a dictionary with the parameters and the associated objects in a dictionary. It works for mailto URLs, too.
Please note: This code assumes you're using 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];
}

---

以下是你的看法使用它：

---

And here is how you use it:

NSURL *mailtoURL = [NSURL URLWithString:@"mailto:[e-mail]?cc=[e-mail]&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"];

编辑：

我将代码更新为使用任何URL和收件人现在都在 mailto URL的字典中。

I updated the code to work with any URL and recipients are now in the dictionary for mailto URLs.

这篇关于解析NSURL mailto的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！