objective-c - Objective-C:如何向NSURL添加查询参数？

假设我有一个NSURL？它是否已经有一个空的查询字符串，如何在query的NSURL中添加一个或多个参数？即，有人知道该功能的实现吗？

- (NSURL *)URLByAppendingQueryString:(NSString *)queryString

使它满足此NSURL+AdditionsSpec.h文件:

#import "NSURL+Additions.h"
#import "Kiwi.h"

SPEC_BEGIN(NSURL_AdditionsSpec)

describe(@"NSURL+Additions", ^{
    __block NSURL *aURL;

    beforeEach(^{
        aURL = [[NSURL alloc] initWithString:@"http://www.example.com"];
        aURLWithQuery = [[NSURL alloc] initWithString:@"http://www.example.com?key=value"];
    });

    afterEach(^{
        [aURL release];
        [aURLWithQuery release];
    });

    describe(@"-URLByAppendingQueryString:", ^{
        it(@"adds to plain URL", ^{
            [[[[aURL URLByAppendingQueryString:@"key=value&key2=value2"] query] should]
             equal:@"key=value&key2=value2"];
        });

        it(@"appends to the existing query sting", ^{
            [[[[aURLWithQuery URLByAppendingQueryString:@"key2=value2&key3=value3"] query] should]
             equal:@"key=value&key2=value2&key3=value3"];
        });
    });
});

SPEC_END

最佳答案

从 iOS 7 开始，您可以使用 NSURLComponents ，它非常易于使用。看一下这些例子:

例子1

NSString *urlString = @"https://mail.google.com/mail/u/0/?shva=1#inbox";
NSURLComponents *components = [[NSURLComponents alloc] initWithString:urlString];

NSLog(@"%@ - %@ - %@ - %@", components.scheme, components.host, components.query, components.fragment);

例子2

NSString *urlString = @"https://mail.google.com/mail/u/0/?shva=1#inbox";
NSURLComponents *components = [[NSURLComponents alloc] initWithString:urlString];

if (components) {
    //good URL
} else {
    //bad URL
}

例子3

NSURLComponents *components = [NSURLComponents new];
[components setScheme:@"https"];
[components setHost:@"mail.google.com"];
[components setQuery:@"shva=1"];
[components setFragment:@"inbox"];
[components setPath:@"/mail/u/0/"];

[self.webview loadRequest:[[NSURLRequest alloc] initWithURL:[components URL]]];

但是您可以使用NSURLComponents做很多其他事情，看看Apple文档或以下链接上的NSURLComponents类引用:http://nshipster.com/nsurl/

关于objective-c - Objective-C:如何向NSURL添加查询参数？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/6309698/