1

UI 选择器让我再次陷入困境，我仍在使用 UI 选择器学习，所以不确定我是否在这里做错了什么。

试图从行 UIPicker 显示图像。

错误：

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFConstantString _isResizable]: unrecognized selector sent to instance 0x70fc' *** First throw call stack:

继承人的代码：

#import "Imagepick.h"

@interface Imagepick ()

@end

@implementation Imagepick
 @synthesize select;
@synthesize imageview;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{


   ////arrays & objects
   arrStatus = [[NSArray alloc] initWithObjects:@"pic1",@"pic2",nil];




}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
//One column
return 1;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:   (NSInteger)component
 {

return arrStatus.count;


 }

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row    forComponent:(NSInteger)component
 {

  return [arrStatus objectAtIndex:row];

 }
 - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{

 [imageview setImage:[arrStatus objectAtIndex:row]]; UIImage *pic1 = [[UIImage alloc]  initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"appstorelogo" ofType:@"png"]];

  [imageview setImage:[arrStatus objectAtIndex:row]]; UIImage *pic2 = [[UIImage alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"applogo" ofType:@"png"]];

 }



 - (void)viewDidUnload
{
[self setImageview:nil];
[self select:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end

*未使用的变量警告pic1&pic2如果相关？

4

1 回答 1

7

你的问题是 [imageview setImage:[arrStatus objectAtIndex:row]]; 您正在尝试使用字符串设置图像。

您也没有使用 pic1 和 pic2。

您可能想要做的是将图像名称设置为数组，如：

arrStatus = [[NSArray alloc] initWithObjects:@"appstorelogo",@"applogo",nil];

然后将图像设置为

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    UIImage *img = [[UIImage alloc]  initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[arrStatus objectAtIndex:row] ofType:@"png"]];

    [imageview setImage:img]; 
}
于 2012-07-30T21:56:41.773 回答