發送錯誤NSURL *到類型的NSString *的參數使用initWithContentsOfFile：

Question

我收到錯誤

「不兼容的指針類型發送「NSURL *爲鍵入 '的NSString *'

的參數調用initWithContentsOfFile:usedEncoding:error:當

- (NSMutableArray *)qBlock{ 
    NSURL *url = [[NSURL alloc] initWithString:@"http://addressToPath.php"]; 
    NSError *error = nil; 
    NSStringEncoding encoding; 
    NSString *response = [[NSString alloc] initWithContentsOfFile:url 
                usedEncoding:&encoding 
                  error:&error]; 
    const char *convert = [response UTF8String]; 
    NSString *responseString = [NSString stringWithUTF8String:convert]; 
    NSMutableArray *sample = [responseString JSONValue]; 


    return sample; 

} 

Answer 1

initWithContentsOfFile:encoding:error:收到NSString *的文件路徑，而不是NSURL *。你需要ŧ o打電話initWithContentsOfURL:encoding:error:：

NSString *response = [[NSString alloc] initWithContentsOfURL:url 
              usedEncoding:&encoding 
                error:&error];