iOS-判断输入的网址是http还是https，判断网址是否可用

前言

最近做了一个项目，app内部打开连接，很多小伙伴都用得到，但是有运营小伙伴，直接输入www.XXX.com，前面没有加上http://或者https://，这样会导致请求不成功，后来查到了，话不多说上代码！

拼接http://或者https://

- (NSString *)getCompleteWebsite:(NSString *)urlStr{
NSString *returnUrlStr = nil;
NSString *scheme = nil;

assert(urlStr != nil);

urlStr = [urlStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
if ( (urlStr != nil) && (urlStr.length != 0) ) {
NSRange urlRange = [urlStr rangeOfString:@"://"];
if (urlRange.location == NSNotFound) {
returnUrlStr = [NSString stringWithFormat:@"http://%@", urlStr];
} else {
scheme = [urlStr substringWithRange:NSMakeRange(0, urlRange.location)];
assert(scheme != nil);

if ( ([scheme compare:@"http" options:NSCaseInsensitiveSearch] == NSOrderedSame)
|| ([scheme compare:@"https" options:NSCaseInsensitiveSearch] == NSOrderedSame) ) {
returnUrlStr = urlStr;
} else {
//不支持的URL方案
}
}
}
return returnUrlStr;
}
示例如下：NSString *str = @"www.baidu.com";
NSLog(@"%@",[self getCompleteWebsite:str]);
2016-04-08 15:40:26.818 ZFJAnimation[6100:155911] http://www.baidu.com

判断网址是否有效

判断此路径是否能够请求成功,直接进行HTTP请求

//判断此路径是否能够请求成功,直接进行HTTP请求
- (void)urliSAvailable:(NSString *)urlStr{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlStr]];
[request setHTTPMethod:@"HEAD"];
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (error) {
NSLog(@"不可用");
}else{
NSLog(@"可用");
}
}];
[task resume];
}


希望对你有所帮助！