終止應用程序由於未捕獲的異常'NSInvalidArgumentExceptioneason：' - [__ NSCFDictionary練習]：無法識別的選擇器

Question

我是新來的xcode，我有這個問題的應用程序崩潰給我這個錯誤，當我嘗試挖掘細胞去DetailViewcontroller有錯誤：*由於未捕獲的異常'NSInvalidArgumentException'而終止應用程序，原因：' - [__ NSCFDictionary練習]：無法識別的選擇器發送到實例0x8ca15b0'。我不確定是什麼原因。我在這裏複製的代碼：

MAsterViewcontroller.h

#import <UIKit/UIKit.h> 

@interface MasterViewController : UITableViewController{ 

    NSMutableArray* routines_; 
    NSMutableArray *routineinfo_; 
} 

@property (nonatomic,retain)NSMutableArray* routines; 
@property (nonatomic,retain)NSMutableArray* routineinfo; 

@end 

文件MasterViewController.m

#import "MasterViewController.h" 

#import "ClassDetailViewController.h" 
#import "ClassConstants.h" 

@implementation MasterViewController 

@synthesize routines=routines_,routineinfo=routineinfo_; 


- (void)awakeFromNib 
{ 
[super awakeFromNib]; 
} 


- (void)viewDidLoad 

    { 
     [super viewDidLoad]; 
     NSString *path = [[NSBundle mainBundle] pathForResource:@"Mills" ofType:@"plist"]; 

     routines_= [[NSMutableArray alloc] initWithContentsOfFile:path]; 

     //Uncomment the following line to displa an Edit button in the navgation bar for this view controller. 

     self.navigationItem.leftBarButtonItem = self.editButtonItem; 

    } 


    - (void)dealloc { 
    [routines_ release]; 
    [routineinfo_ release]; 
    [super dealloc]; 
} 


- (void)insertNewObject:(id)sender 
{ 
    // if (!_objects) { 
    //  _objects = [[NSMutableArray alloc] init]; 
    // } 
    // [_objects insertObject:[NSDate date] atIndex:0]; 
    // NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; 
    // [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; 
} 

#pragma mark - Table View 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{ 
    return 1; 
} 



//Customize the number of rows in the table view. 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ 

    return [self.routines count]; 

} 


//Configure appearence of table view cells. 


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 

{ 
    static NSString *CellIdentifier = @"Cell"; 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
    } 

    //Configure the cell. 
    cell.textLabel.text = [[self.routines objectAtIndex:indexPath.row] 
         objectForKey:NAME_KEY]; 

    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 

    return cell; 
} 

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // Return NO if you do not want the specified item to be editable. 
    return YES; 
} 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    if ([[segue identifier] isEqualToString:@"showDetail"]) { 

     // Get the data given the selected row 
     NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; 
     NSInteger IndexSelected=[indexPath row]; 
     //NSDictionary *routinedata = [self->routines_ objectAtIndex:[indexPath row]]; 

     // Pass that data on to the DetailViewController 
     DetailViewController *detailVC = segue.destinationViewController; 


     NSString *pathSelected=@"";; 


     switch (IndexSelected) 

     { 
      case 0: 

       pathSelected = [[NSBundle mainBundle] pathForResource:@"Mills0" ofType:@"plist"]; 

       break; 

      case 1: 
       pathSelected = [[NSBundle mainBundle] pathForResource:@"Mills1" ofType:@"plist"]; 

       break; 

      case 2: 
        pathSelected = [[NSBundle mainBundle] pathForResource:@"Mills2" ofType:@"plist"]; 

       break; 

      default: 
       break; 

     } 
     routineinfo_= [[NSMutableArray alloc] initWithContentsOfFile:pathSelected]; 

     detailVC.routineinfo = self.routineinfo; 


    } 
} 



@end 


    #import <UIKit/UIKit.h> 
@interface DetailViewController : UITableViewController{ 

@private 
NSMutableArray *routineinfo_; 


} 
@property (nonatomic, retain) NSMutableArray *routineinfo; 


@end 

ClassDetailViewController.h

#import <UIKit/UIKit.h> 
@interface DetailViewController : UITableViewController{ 

@private 
NSMutableArray *routineinfo_; 


} 
@property (nonatomic, retain) NSMutableArray *routineinfo; 


@end 

ClassDetailViewController.m文件

的子類文件LesMillsCell.h

#import <UIKit/UIKit.h> 

@interface LesMillsCell : UITableViewCell{ 

@private 

// UITableViewCell *lesmillscell_; 
UILabel *Exercise_; 
UILabel *Title_; 
UILabel *Artist_; 
UILabel *Time_; 
NSMutableArray *routineinfo_; 



} 


@property (nonatomic, retain) IBOutlet UILabel *Exercise; 
@property (nonatomic, retain) IBOutlet UILabel *Title; 
@property (nonatomic, retain) IBOutlet UILabel *Artist; 
@property (nonatomic, retain) IBOutlet UILabel *Time; 





@end 

LesMillsCells.m

#import "LesMillsCell.h" 
#import "ClassConstants.h" 
#import "MillsDetailsConstant.h" 

@implementation LesMillsCell 

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier 
{ 
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]; 
    if (self) { 
     // Initialization code 
    } 
    return self; 
} 

- (void)setSelected:(BOOL)selected animated:(BOOL)animated 
{ 
    [super setSelected:selected animated:animated]; 

    // Configure the view for the selected state 
} 

@end 

謝謝您的幫助！

Answer 1

如果在該線發生崩潰：

LesMillsCell.Exercise.text= [[self.routineinfo objectAtIndex:indexPath.row] objectForKey:EXERCISE_KEY]; 

這意味着LesMillsCell不是LesMillsCell類的對象，但NSDictionary的（或__NSCFDictionary）。因此，在該對象上使用練習會導致錯誤，因爲字典不支持該方法。錯誤就從這裏開始：

LesMillsCell *LesMillsCell=self.routineinfo [indexPath.row]; 

self.routineinfo [indexPath.row]返回id類型的對象，所以編譯器無法知道什麼類型實際上是，這樣的分配不用警告。

此外，您正在以兩種不同的方式使用routineinfo。首先，你把它當作LesMillsCell

LesMillsCell *LesMillsCell=self.routineinfo [indexPath.row]; 

而下面你一條線把它當作字典，並提取值EXERCISE_KEY：

[[self.routineinfo objectAtIndex:indexPath.row] 
        objectForKey:EXERCISE_KEY];