Question

我正在尝试按照代码在tableview中设置单元格的图像。我将所有图片放在我的mainbundle（Øvelser/ Pictures）文件夹的子目录中，并且从NSLog（）可以看到数组中的所有图片，但应用程序将无法获取它们。下面的代码和崩溃报告：

 @implementation STATableViewController
 @synthesize nameOfExercises = _nameOfExercises;
 @synthesize exercisePicture = _exercisePicture;

 - (void)viewDidLoad
 {
[super viewDidLoad];    

//will get the name of the files in the exercise folder
_nameOfExercises = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"Øvelser/Text"]error: nil];  

 _exercisePicture = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:@"Øvelser/Pictures"]error: nil]; 

NSLog(@"%@", _nameOfExercises);
NSLog(@"%@", _exercisePicture);

 }     

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 {
return [_nameOfExercises count];
 }

 - (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];
}
//the extension is removed, before it's set to the labeltext
NSString *cellValue = [[_nameOfExercises objectAtIndex:indexPath.row] stringByDeletingPathExtension];
cell.textLabel.text = cellValue;
cell.imageView.image = [_exercisePicture objectAtIndex:indexPath.row]; 


return cell;
 }

控制台：

2012-04-02 14:31:58.324 STA[9665:11f03] (
"Fisketelefon.txt",
"Krammebamse.txt",
"Raketstart.txt"
)

2012-04-02 14:31:58.326 STA[9665:11f03] (
"Fisketelefon.jpg",
"Krammebamse.jpg",
"Raketstart.jpg"
)
2012-04-02 14:31:58.329 STA[9665:11f03] -[__NSCFString _isResizable]: unrecognized selector sent to instance 0x785d5e0
2012-04-02 14:31:58.330 STA[9665:11f03] *** Terminating app due to uncaught exception     'NSInvalidArgumentException', reason: '-[__NSCFString _isResizable]: unrecognized selector sent to instance 0x785d5e0'
*** First throw call stack:
(0x14b7052 0x1a6bd0a 0x14b8ced 0x141df00 0x141dce2 0x4ed91b 0x3290 0x49de0f 0x49e589 0x489dfd 0x498851     0x443301 0x14b8e72 0xe792d 0xf1827 0x77fa7 0x79ea6 0x10530c 0x4034c6 0x403bd6 0x412743 0x4131f8 0x406aa9 0x23a4fa9 0x148b1c5 0x13f0022 0x13ee90a 0x13eddb4 0x13edccb 0x4032a7 0x404a9b 0x23f8 0x2355)
terminate called throwing an exceptionwarning: Attempting to create USE_BLOCK_IN_FRAME variable with block     that isn't in the frame.
warning: Attempting to create USE_BLOCK_IN_FRAME variable with block that isn't in the frame.
warning: Attempting to create USE_BLOCK_IN_FRAME variable with block that isn't in the frame.
warning: Attempting to create USE_BLOCK_IN_FRAME variable with block that isn't in the frame.

Answer 1

您应该将图像（UIImage类的实例）分配到imageView.image属性中。但是你存储的是一个包含图像的文件名。您必须将文件名转换为实际图像：

NSString *pathPrefix = [[NSBundle mainBundle] bundlePath]
    stringByAppendingPathComponent:@"Øvelser/Pictures"];
NSString *imageName = [_exercisePicture objectAtIndex:indexPath.row];
NSString *fullImagePath = [pathPrefix stringByAppendingPathComponent:imageName];
[[cell imageView] setImage:[UIImage imageWithContentsOfFile:fullImagePath]];

Answer 2

疯狂猜测：

_exercisePicture中的对象是字符串。然后你尝试将图像设置为字符串：

cell.imageView.image = [_exercisePicture objectAtIndex:indexPath.row];

请确保_exercisePicture中的对象是图片。

希望有所帮助

无法在表格视图中显示图像

2 个答案: