iPhoneプログラミング初心者です。以下のコードを使用して、サムネイルに画像を表示しています。複数の画像を選択したり、画像を選択および選択解除したりできます。いくつかの画像を選択すると、選択した画像が次のビューに表示されます。そのために、私は別の方法を使用していました。しかし、問題はサムネイルに画像を表示することですが、画像を選択すると例外が表示されます。これを解決する方法を教えてもらえますか？
- (void)viewDidLoad
{
self.title=@"All Images";
mImageSelected=[[NSMutableArray alloc]init];
self.view.backgroundColor=[UIColor whiteColor];
mFirst=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"one.jpg"]];
mFirst.frame=CGRectMake(10, 10, 60, 50);
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(actionHandleTapOnImageView:)];
mFirst.userInteractionEnabled = YES;
[mFirst addGestureRecognizer:singleTap];
[self.view addSubview:mFirst];
msSec=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"two.jpg"]];
msSec.frame=CGRectMake(80, 10, 60, 50);
UITapGestureRecognizer *secsingleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(actionHandleTapOnImageView:)];
msSec.userInteractionEnabled = YES;
[msSec addGestureRecognizer:secsingleTap];
[self.view addSubview:msSec];
mThird=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"three.jpg"]];
mThird.frame=CGRectMake(150, 10, 60, 50);
UITapGestureRecognizer *trdsingleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(actionHandleTapOnImageView:)];
mThird.userInteractionEnabled = YES;
[mThird addGestureRecognizer:trdsingleTap];
[self.view addSubview:mThird];
m4th=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"four.jpg"]];
m4th.frame=CGRectMake(220, 10, 60, 50);
UITapGestureRecognizer *frthsingleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(actionHandleTapOnImageView:)];
m4th.userInteractionEnabled = YES;
[m4th addGestureRecognizer:frthsingleTap];
[self.view addSubview:m4th];
m5th=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"five.jpg"]];
m5th.frame=CGRectMake(10, 70, 60, 50);
UITapGestureRecognizer *fifthsingleTap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(actionHandleTapOnImageView:)];
m5th.userInteractionEnabled = YES;
[m5th addGestureRecognizer:fifthsingleTap];
[self.view addSubview:m5th];
UIButton *theSshowButton=[[UIButton alloc]init];
theSshowButton.frame=CGRectMake(100, 300, 100, 30);
theSshowButton.layer.borderWidth=2;
theSshowButton.layer.borderColor=[UIColor purpleColor].CGColor;
theSshowButton.layer.cornerRadius=5;
theSshowButton.backgroundColor=[UIColor greenColor];
[theSshowButton setTitle:@"Show" forState:UIControlStateNormal];
[theSshowButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[theSshowButton addTarget:self action:@selector(show) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:theSshowButton];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)actionHandleTapOnImageView:(UITapGestureRecognizer *) in_ImageSenderTap
{
if (in_ImageSenderTap.view.tag ==0 )
{
mTick=[[UIImageView alloc]initWithImage:[UIImage imageNamed: @"mark.jpg"]];
mTick.frame=CGRectMake(0, 0, in_ImageSenderTap.view.frame.size.width*0.3, in_ImageSenderTap.view.frame.size.height*0.4);
[mImageSelected addObject:[in_ImageSenderTap.view accessibilityIdentifier]];
[in_ImageSenderTap.view addSubview:mTick];
in_ImageSenderTap.view.tag=1;
}
else
{
for (UIView *subviews in in_ImageSenderTap.view.subviews)
{
UIImageView *theSubview=(UIImageView*)subviews;
[theSubview removeFromSuperview];
[mImageSelected removeObjectIdenticalTo:[in_ImageSenderTap.view accessibilityIdentifier]];
}
in_ImageSenderTap.view.tag=0;
}
}
このように、期待を示しています。
2013-03-01 12:01:21.332 ImageStuf[588:11303] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:
(0x159a012 0x12a7e7e 0x154db6a 0x154da20 0x37e0 0x4b685a 0x4b599b 0x4b70df 0x4b9d2d 0x4b9cac 0x4b1a28 0x21e972 0x21ee53 0x1fcd4a 0x1ee698 0x25fcdf9 0x25fcad0 0x150fbf5 0x150f962 0x1540bb6 0x153ff44 0x153fe1b 0x25fb7e3 0x25fb668 0x1ebffc 0x1cd2 0x1c05 0x1)
libc++abi.dylib: terminate called throwing an exception
(lldb)
このメソッドのコードの下にコメントすると
-(void)actionHandleTapOnImageView:(UITapGestureRecognizer *) in_ImageSenderTap、正常に動作するが、配列に画像を保存していないことを意味します。
[mImageSelected addObject:[in_ImageSenderTap.view accessibilityIdentifier]];