当我尝试在Exception in thread "main" java.sql.SQLException: org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=36, exceptions:
Mon Oct 17 11:50:18 IST 2016, null, java.net.SocketTimeoutException: callTimeout=60000, callDuration=80992: row 'SYSTEM:CATALOG,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=HOSTNAME,16201,1476683863488, seqNum=0
的子类中将UITabBarDelegate设置为self时,我的应用程序崩溃了。我有一个UIViewController
,其中有几个TabItems链接到View Controllers。其中一个视图控制器是UITabBarViewController
。我在HomeViewController
中有以下代码:
HomeViewController
如果我删除class HomeViewController: UIViewController, UITabBarDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.tabBarController?.tabBar.translucent = false
self.extendedLayoutIncludesOpaqueBars = true
self.tabBarController?.tabBar.delegate = self //This is causing crash
}
}
行,一切正常,我的tabBar按预期运行,但当我重新添加该行时,我遇到以下崩溃:
self.tabBarController?.tabBar.delegate = self
不完全确定如何解决此问题。在SO上找到了一些其他的答案,但他们似乎仍然不清楚这个过程是什么使这个工作。
谢谢!
答案 0 :(得分:1)
您的UITabBarViewController已经是UITabBar的委托。不要将viewController作为tabBarDelegate,而是使用tabBarViewController并将逻辑放在那里。
你可以这样做。在tabBarViewController的didSelectItem委托方法
中- (PDFDocument *)pdfDocument {
// create a page
PDFDocument *document = [[PDFDocument alloc] initWithURL:[NSURL fileURLWithPath:@"/Users/test/Downloads/Eticket.pdf"]];
NSMutableDictionary *popupDictionary = [[NSMutableDictionary alloc] init];
[popupDictionary setObject:@"/Popup" forKey:kPDFAnnotationKey_Subtype];
[popupDictionary setObject:[NSColor redColor] forKey:kPDFAnnotationKey_Color];
[popupDictionary setObject:@"Hello" forKey:kPDFAnnotationKey_Contents];
NSValue *rectValue = [NSValue valueWithRect:NSMakeRect(100, 100, 40, 40)];
[popupDictionary setObject:rectValue forKey:kPDFAnnotationKey_Rect];
PDFAnnotation *textAnnotation = [[PDFAnnotation alloc] initWithDictionary: popupDictionary forPage: [document pageAtIndex:0]];
[[document pageAtIndex:0] addAnnotation:textAnnotation]; // add it to the PDF document
return document;
}