我想只需要簡單的URL不包含http：//

Question

我想補充的「http：//」只輸入一個簡單的URL

我曾嘗試

使用戶發現它很容易瀏覽裏面的代碼

- (IBAction)uurl:(id)sender { 
    NSURL *myurl = [NSURL URLWithString : @"http://"]; 
} 

，但它不工作

Answer 1

//This is what the user types, depending on the type of input you use 
NSString *urlString = @"www.bla.com"; 

NSString *httpString = @"http://"; 
urlString = [httpString stringByAppendingString:urlString]; 

//OR urlString = [NSString stringWithFormat:@"http://%@",urlString]; 

NSURL *url = [NSURL URLWithString:urlString]; 

Answer 2

好的，這是很簡單的事，但我們需要的，如果用戶輸入http://或https://自己檢查爲好。所以，請參見下面在評論

- (IBAction)uurl:(id)sender 
{ 
    // Our to NSStrings that we want to be checking for. 
    static NSString *httpsStr = @"https://"; 
    static NSString *httpStr = @"http://"; 

    NSString *urlStr = @"www.google.com"; // User input however you take this 

    // Our check to make sure that the urlStr passed in does already have http or https 
    if(![urlStr hasPrefix:httpsStr] && ![urlStr hasPrefix:httpStr]) { 
     // If it doesn't have anything our default HTTP Protocol will be http 
     urlStr = [NSString stringWithFormat:@"http://%@", urlStr]; 
    } 

    // If the user has entered the http or https themselves ignore reseting to http 
    // Set our urlStr as the URL we want to use. 
    NSURL *url = [NSURL URLWithString:urlStr]; 

    // At this point you would do whatever it is you want to do with the url 
} 

Answer 3

使用-initWithScheme:host:path:

// your user input string 
NSString *userString = @"www.apple.com"; 

NSURL *yourURL; 

if (![userString hasPrefix:@"http://"]) 
    yourURL = [[NSURL alloc] initWithScheme:@"http" host:userString path:@"/"]; 
else 
    yourURL = [[NSURL alloc] initWithString:userString];