NSString到NSURL？

Question

试图将字符串转换为NSURL,但这不会发生.

barcodeTextLabel.text = foundCode.barcodeString;
urlToGrab = [NSString stringWithFormat:@"%@", foundCode.barcodeString]; // foundCode.barcodeString is an NSString

urlToGrab显示以下"错误无效的CFStringRef"

Answer 1

这是你如何创建NSURL一个NSString:

NSURL *url = [NSURL URLWithString:@"http://www.google.com"];