检查 NSArray 中是否包含 NSString hasPrefix [英] Check if NSString hasPrefix that is contained in NSArray

问题描述

我有这个 if 语句来检查 URL 是否以前缀开头:

I have this if statement to check if a URL starts with a prefix:

NSString *baseUrl = @"http://example.com/";

NSString *currentURL = @"http://example.com/confirm";

if( [currentURL hasPrefix:[baseUrl stringByAppendingString:@"confirm"]] ){

    // True, so do something...

}

我想修改我的 if 语句的 hasPrefix 部分，以便在 currentUrl 附加 ANY 时返回 true 此处显示的 NSArray 中的值:

I would like to modify the hasPrefix part of my if statement so that it returns true if currentUrl is appended by ANY of the values in my NSArray shown here:

NSArray *pages = [NSArray arrayWithObjects:@"confirm",@"products",nil];

我该怎么做?

推荐答案

只要遍历你的 pages 数组并设置一个布尔标志(如果存在任何术语)

just iterate through your pages array and set a boolean flag if any of the terms exist

//
//  customstring.m
//
//  Created by rbertsch8 on 8/2/13.
//
//

#import "customstring.h"

@implementation customstring

-(bool)hasPrefixArray:(NSArray*)array withbaseURL:(NSString*)baseUrl
{
    bool hasprefix = NO;
    for(int i = 0; i < [array count] || hasprefix == NO; i++)
    {
        hasprefix = [self hasPrefix:[baseUrl stringByAppendingString:[array objectAtIndex:i]]];
    }

    return hasprefix;
}

@end

现在在您的代码中执行以下操作://导入自定义字符串文件#import NSStringPrefix.h

Now in your code do the following: //import your custom string file #import NSStringPrefix.h

NSStringPrefix *customURL = yoururl.com
NSString *baseUrl = baseurl.com
NSArray *yourarray = [[NSArray alloc] initWithObjects: @"one", @"two"]

if([customURL hasPrefixArray:yourarray withbaseURL:baseUrl])
{
    //dowork
}

更新

在全局类中定义变量.

#define companyOrSiteName @"Company X"
#define baseUrl @"http://www.example.com/" // Set base URL for site.
#define customUrlScheme @"example://" // Set custom URL Scheme for app.
#define openInModal [NSArray arrayWithObjects: @"contact-us.php",@"products/",nil]
#define openInSafari [NSArray arrayWithObjects: @"about",@"products/resources/download",nil]
#define twitterHandle @"Example" // Twitter username without the "@" symbol
#define kTrackingId @"UA-4564564-3" // Set Google Analytics iOS App Tracking code.

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