我有一個奇怪的問題。我得到這個錯誤:tableView:numberOfRowsInSection:]:無法識別的選擇器發送到實例
-[FourSquareCheckInViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x7aecc0
2012-09-14 19:18:39.039 [5869:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[FourSquareCheckInViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x7aecc0'
*** First throw call stack:
(0x3545e88f 0x37805259 0x35461a9b 0x35460a83 0x353bb650 0x32ee3693 0x32ee49ed 0x32ee493f 0x32ee451b 0x32ef17df 0x32ef16af 0x32e95f37 0x353bd1fb 0x3228daa5 0x3228d6bd 0x32291843 0x3229157f 0x322894b9 0x35432b1b 0x35430d57 0x354310b1 0x353b44a5 0x353b436d 0x37050439 0x32ec0cd5 0xb7ebb 0xb7e60)
terminate called throwing an exception(lldb)
好吧,所以我確保ViewController設置爲dataSource和Delegate。我已經將UITableViewDelegate和UITableViewDataSource添加到了這些東西中。
我在我的viewDidLoad方法中設置了tableView.delegate = self和tableView.dataSource = self。
這是我的實施viewDidLoad中和viewDidAppear方法:
- (void)viewWillAppear:(BOOL)animated{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer; // 1km
[locationManager startUpdatingLocation];
locationLat = [locationManager location].coordinate.latitude;
locationLng = [locationManager location].coordinate.longitude;
[locationManager stopUpdatingLocation];
// 1
CLLocationCoordinate2D zoomLocation;
zoomLocation.latitude = locationLat;
zoomLocation.longitude= locationLng;
// 2
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);
// 3
MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];
// 4
[_mapView setRegion:adjustedRegion animated:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
_tableView.delegate = self;
_tableView.dataSource = self;
// Do any additional setup after loading the view.
// 1
MKCoordinateRegion mapRegion = [_mapView region];
CLLocationCoordinate2D centerLocation = mapRegion.center;
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyKilometer; // 1km
[locationManager startUpdatingLocation];
locationLat = [locationManager location].coordinate.latitude;
locationLng = [locationManager location].coordinate.longitude;
[locationManager stopUpdatingLocation];
}
這裏是我的numberOfRowsInSection方法體:
- (NSInteger)numberOfRowsInSection:(NSInteger)section{
return 5;
}
這裏是視圖控制器我的頭文件:
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#define METERS_PER_MILE 1609.344
@interface FourSquareCheckInViewController : UIViewController <UITableViewDelegate, UITableViewDataSource, CLLocationManagerDelegate, MKMapViewDelegate>{
}
@property (weak, nonatomic) IBOutlet MKMapView *_mapView;
- (NSInteger)numberOfRowsInSection:(NSInteger)section;
@property (weak, nonatomic) IBOutlet UITableView *_tableView;
@end
下面是顯示我的tableView如何連接的屏幕截圖:
我可以有一些這種方法的代碼示例?我無法找到它。 – jimbob
http://developer.apple.com/library/ios/documentation/userexperience/conceptual/TableView_iPhone/CreateConfigureTableView/CreateConfigureTableView.html#//apple_ref/doc/uid/TP40007451-CH6-SW5 – matt
docs:http:// developer .apple.com /庫/ IOS /#文檔/ UIKit的/參考/ UITableViewDataSource_Protocol /參考/的reference.html – matt