xcode 无法识别的选择器发送到实例 UIViewController
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Unrecognized Selector Sent to Instance UIViewController
提问by Terrel Gibson
I keep getting the error:
我不断收到错误：
NSInvalidArgumentException', reason: '-[UIViewController setPhotoCellName:]: unrecognized selector sent to instance
NSInvalidArgumentException'，原因：'-[UIViewController setPhotoCellName:]：无法识别的选择器发送到实例
when I enter my prepare for segue call. Currently I have
当我进入我的准备调用 segue 时。目前我有
TabBarController->NavigationController->TableViewController->TableViewController->ViewController
TabBarController->NavigationController->TableViewController->TableViewController->ViewController
with a UI image on it.
上面有一个 UI 图像。
The problem occurs when I try to segue from the second TableView controller to the ViewController. I have the segue setup from the Prototype Cell to the actual ViewController. It enters the segue and crashes. I am trying to pass an NSArrayproperty over to the viewControllerto be able to use a URL in it and display the UIImage. PhotoInPlace contains the array that Im trying to pass. Here is the code.
当我尝试从第二个 TableView 控制器转到 ViewController 时，会出现问题。我有从 Prototype Cell 到实际 ViewController 的 segue 设置。它进入转场并崩溃。我正在尝试将一个NSArray属性传递给 ，viewController以便能够在其中使用 URL 并显示UIImage. PhotoInPlace 包含我试图传递的数组。这是代码。
myTableViewControllerPhotoLocation.m Code
myTableViewControllerPhotoLocation.m 代码
#import "myTableViewControllerPhotoLocation.h"
#import "FlickrImageViewController.h"
@interface myTableViewControllerPhotoLocation ()
@end
@implementation myTableViewControllerPhotoLocation
@synthesize photoInPlace = _photoInPlace; //Contains NSArray to pass
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([segue.identifier isEqualToString:@"Photo Display"]){
NSIndexPath* indexPath = [self.tableView indexPathForCell:sender];
NSLog(@" Dicitonary = %@", [self.photoInPlace objectAtIndex:indexPath.row]); //Returns the picked cell
NSLog(@"%@", [self.photoInPlace class]); //returns NSArray
NSLog(@"%@", [self photoInPlace]); //Returns the array
[segue.destinationViewController setPhotoCellName:[self.photoInPlace objectAtIndex:indexPath.row]];
//Crashes HERE!
}
}
FlickrImageViewController.h Code
FlickrImageViewController.h 代码
@property (nonatomic, strong) NSArray* photoCellName;
FlickrImageViewController.m Code
FlickrImageViewController.m 代码
#import "FlickrImageViewController.h"
@interface FlickrImageViewController ()
@end
@implementation FlickrImageViewController
@synthesize photoCellName = _photoCellName; //property declared in header
-(void) setPhotoCellName:(NSArray *)photoCellName{
if(!_photoCellName)
_photoCellName = [[NSArray alloc] initWithArray:photoCellName];
else {
_photoCellName = photoCellName;
}
}
回答by Phillip Mills
You believe that your destination is an object from the FlickrImageViewControllerbut the app doesn't. Look at the class you have assigned that controller in your storyboard; according to the error, it's a bare UIViewController.
你相信你的目的地是来自 的对象，FlickrImageViewController但应用程序不是。查看您在故事板中分配该控制器的类；根据错误，它是一个裸的UIViewController.
回答by Chuck
It sounds like you've accidentally got a plain vanilla UIViewController rather than a FlickrImageViewController. Maybe you forgot to assign the controller's class?
听起来你不小心得到了一个普通的 UIViewController 而不是 FlickrImageViewController。也许你忘了分配控制器的类？
