如果NSURL不存在，请将http：//添加到NSURL [英] Add http:// to NSURL if it's not there

问题描述

我在我的应用中使用网页视图，从文本字段中获取网址。如果字符串以http：//开头，则它可以工作。我正在尝试修改代码，以便它还可以处理用户不输入http：//或https：//的情况

I am using web view in my app, getting a URL from a text field. It works if the string starts with "http://". I am trying to modify the code so that it can also handle the situations where users don't enter "http://" or "https://"

如何检查URL中是否没有http：//？
如何修改URL以在其中添加http：//？

How to check if the URL doesn't have "http://" in it ? How to modify the URL to add "http://" in it ?

NSString *URLString = textField.text;
NSURL *URL = [NSURL URLWithString:URLString];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[self.webView loadRequest:request];

推荐答案

NSString *urlString = @"google.com";
NSURL *webpageUrl;

if ([urlString hasPrefix:@"http://"] || [urlString hasPrefix:@"https://"]) {
    webpageUrl = [NSURL URLWithString:urlString];
} else {
    webpageUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@", urlString]];
}

NSURLRequest *urlRequest = [NSURLRequest requestWithURL:webpageUrl];
[self.myWebView loadRequest:urlRequest];

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