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问题描述

我正在尝试检查给定的网址是否有效,我这样做:

I'm trying to check if a given URL is valid and i'm doing it like this:

- (BOOL)urlIsValid:(NSString *)address {
    NSURL *testURL = [NSURL URLWithString:address];
    if (testURL == nil) {
        return NO;
    }
    else {
        return YES;
    }
}

由于URLWithString应该返回nil如果URL格式不正确,我认为这样可行,但不是出于某种原因。有人可以告诉我为什么吗?
提前致谢!

Since "URLWithString" is supposed to return "nil" if the URL is malformed I thought this would work but it doesn't for some reason. Could someone please tell me why?Thanks in advance!

推荐答案

NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:@"yourstring"]];
bool valid = [NSURLConnection canHandleRequest:req];

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08-20 11:59
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