我收到错误
由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:
'
-[NSConcreteData initWithContentsOfURL:options:error:]: nil URL argument'`
当我尝试viewController
从ViewControllerA
到推送时应用程序崩溃ViewControllerB
下面是我的代码ViewControllerB
,
dispatch_queue_t concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
//this will start the image loading in bg
dispatch_async(concurrentQueue, ^{
NSError *nserror = nil;
NSData *imageData = [NSData dataWithContentsOfURL:url options:NSDataReadingUncached error:&nserror];
//this will set the image when loading is finished
dispatch_async(dispatch_get_main_queue(), ^{
if (nserror) {
UIImage *image = [UIImage imageNamed:@"prod_img3.png"];
pro_image.image = image;
}
else{
UIImage *image = [UIImage imageWithData:imageData];
pro_image.image = image;
}
[self doneChecking];
});
});
我究竟做错了什么?谢谢你的帮助。