iphone - NSString 到 NSurl

Question

无法将 NSSTRING 转换为 NSURL，item.image 包含我通过 xml 获取的图像的 url

NSString *urlString = [NSString stringWithFormat:@"%@", item.image];
NSURL *url = [NSURL URLWithString:urlString];

NSLog(@"string> %@ ", urlString);
NSLog(@"url> %@ ", url);

2011-06-23 11:18:49.610 Test[10126:207] string> http://www.harlemfur.com/images/Dog_Olive.jpg       
2011-06-23 11:18:49.611 Test[10126:207] url> (null) 

如果我尝试:

NSString *urlString = [NSString stringWithFormat:@"%@", item.image];
NSURL *url = [NSURL fileURLWithPath :urlString];

2011-06-23 11:22:08.063 Test[10199:207] string> http://www.harlemfur.com/images/Dog_Olive.jpg

2011-06-23 11:22:08.064 Test[10199:207] url> %0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20http://www.harlemfur.com/images/Dog_Olive.jpg%0A%20%20%20%20%20%20%20%20%20%20%20%20 -- / 

Answer 1

从 NSString 生成 URL 时，不要忘记先对其进行编码，所以试试这个:

NSString *urlString = [NSString stringWithFormat:@"%@", item.image];
NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];  

IOS ≥ 9.0使用

NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]]];