xcode NSInvalidArgumentException'，原因：'-[__NSCFString isFileURL]：无法识别的选择器发送到实例 0x712e450'
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NSInvalidArgumentException', reason: '-[__NSCFString isFileURL]: unrecognized selector sent to instance 0x712e450'
提问by nbs
I am new to iPhone App development.
我是 iPhone 应用程序开发的新手。
When I run a sample project, I did which parses an xmlfeed and displays the contents along with image in a table view, I get this error -
当我运行一个示例项目时，我解析了一个xml提要并在表格视图中显示内容和图像，我收到这个错误 -
"NSInvalidArgumentException', reason: '-[__NSCFString isFileURL]: unrecognized selector sent to instance 0x712e450'"
It is occurring only when I try to display the image in UITableViewCell.
仅当我尝试在UITableViewCell.
The code I used for getting images from urlis -
我用来获取图像的代码url是 -
if([elementName isEqualToString:IMAGE])
{
NSURL *imageUrl = [attributeDict objectForKey:@"url"];
NSData *imageData = [NSData dataWithContentsOfURL:imageUrl];
bbc.image = [UIImage imageWithData:imageData];
}
where bbcis a class(NSObject subclass)object used to store the parsed contents.
其中bbc是class(NSObject subclass)用于存储解析内容的对象。
回答by Ramaraj T
I think you are using NSStringas NSURL. Try this:
我认为您正在使用NSStringas NSURL。尝试这个：
NSURL *imageUrl =[NSURL URLWithString:[attributeDict objectForKey:@"url"]];
回答by trojanfoe
It looks like "url" is in fact an NSString, not an NSURLobject. Convert it to an NSURLobject yourself:
看起来“url”实际上是一个NSString，而不是一个NSURL对象。NSURL自己将其转换为对象：
if ([elementName isEqualToString:IMAGE])
{
NSString *urlStr = [attributeDict objectForKey:@"url"];
NSURL *imageUrl = [NSURL URLWithString:urlStr];
NSData *imageData = [NSData dataWithContentsOfURL:imageUrl];
bbc.image = [UIImage imageWithData:imageData];
}
回答by Ramy Al Zuhouri
imageURL is not a NSURL, but a string.
imageURL 不是 NSURL，而是一个字符串。
