Crash on Setting Delegate

Question

I have a custom view (settingview) with nib and protocol. i want to add this view on a viewcontoller with delegate. When i set its delegate my app crashes and i don't know what i have done wrong.

i don't have NIB for ViewController.

i am attaching few images of my code and View's NIB.

-[UIView setDelegate:]: unrecognized selector sent to instance 0xb265e20

.h

@protocol  SettingViewDelegate

@required

-(void)CornerSlider:(id)sender;
-(void)MarginSlider:(id)sender;
-(void)BorderSlider:(id)sender;
-(void)ShadowSlider:(id)sender;
-(void)BorderColor:(id)sender;
-(void)ShadowColor:(id)sender;
-(void)remove:(id)sender;
@end

@interface SettingView : UIView

@property (nonatomic, assign) id  delegate;

-(IBAction)CornerSlider1:(id)sender;
-(IBAction)MarginSlider1:(id)sender;
-(IBAction)BorderSlider1:(id)sender;
-(IBAction)ShadowSlider1:(id)sender;
-(IBAction)BorderColor1:(id)sender;
-(IBAction)ShadowColor1:(id)sender;
-(IBAction)remove1:(id)sender;

@end

.m

@implementation SettingView


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self = [[[NSBundle mainBundle] loadNibNamed: @"Setting"
                                          owner: self
                                        options: nil] objectAtIndex:0];
    }
    return self;
}

-(IBAction)CornerSlider1:(id)sender
{
    [self.delegate CornerSlider:sender];
}
-(IBAction)MarginSlider1:(id)sender
{
    [self.delegate MarginSlider:sender];
}
-(IBAction)BorderSlider1:(id)sender
{
    [self.delegate BorderSlider:sender];
}
-(IBAction)ShadowSlider1:(id)sender
{
    [self.delegate ShadowSlider:sender];
}
-(IBAction)BorderColor1:(id)sender{
    [self.delegate BorderColor:sender];
}
-(IBAction)ShadowColor1:(id)sender{
    [self.delegate ShadowColor:sender];
}
-(IBAction)remove1:(id)sender{
    [self.delegate remove:sender];
}


@end

Views Nib

app crashes here after setting its delegate.

SettingView *settingView=[[SettingView alloc]init];
[settingView setDelegate:self];
[self.view addSubview:settingView];

write this in SettingsView "@property(nonatomic, assign)id delegate;" it will work — Vaibhav Gautam, Sep 03 '13 at 08:33
Please do not use screenshots of code. It makes editing impossible. — Rob van der Veer, Sep 03 '13 at 08:35
Hm, everything looks ok. You should make sure you are setting the delegate to the SettingView. Place a breakpoint around place where you setDelegate, and check the settingView instance. — Dobroćudni Tapir, Sep 03 '13 at 08:45
@DobroćudniTapir yes i did. app crashing on line [settingView setDelegate:self]; . — Blind Ninja, Sep 03 '13 at 08:49
I don't think it's related, but you wouldn't get it working in any case if you don't either call the initWithFrame method or override the simple init method to load the view from Nib too — micantox, Sep 03 '13 at 09:08

score 3 · Answer 1 · answered Sep 03 '13 at 10:54

3

Replace @required with @optional

@protocol  SettingViewDelegate

@optional 

-(void)CornerSlider:(id)sender;
-(void)MarginSlider:(id)sender;
-(void)BorderSlider:(id)sender;
-(void)ShadowSlider:(id)sender;
-(void)BorderColor:(id)sender;
-(void)ShadowColor:(id)sender;
-(void)remove:(id)sender;
@end

answered Sep 03 '13 at 10:54

Nevil Lad

533
6
20

i want these as Required. – Blind Ninja Sep 03 '13 at 11:34
@HarvantS. Then you must have to define those method in .m file and have to declare in .h file – Nevil Lad Sep 03 '13 at 11:38
yes they are defined in .m file. and i don't think protocol methods needs to declare in .h file. are they? b'cos they are already declared in my protocol. – Blind Ninja Sep 03 '13 at 11:50
@HarvantS. If you have any doubt please read https://developer.apple.com/library/ios/documentation/cocoa/conceptual/ProgrammingWithObjectiveC/WorkingwithProtocols/WorkingwithProtocols.html :) – Nevil Lad Sep 03 '13 at 12:00
"By default, all methods declared in a protocol are required methods. This means that any class that conforms to the protocol must implement those methods." According to your link the class only needs to implement protocol methods. – Blind Ninja Sep 03 '13 at 12:38
@HarvantS. ok then Enjoy :) – Nevil Lad Sep 04 '13 at 07:25

score 0 · Answer 2 · edited May 23 '17 at 12:30

0

See whether you have implemented all the methods of your delegate into your "self.view" class where you add your "Setting View". Also, see whether you had implemented "SettingsViewDelegate" into the class you add "Setting View" as subview.

For more clarification, look this https://stackoverflow.com/a/12660523/859001

edited May 23 '17 at 12:30

Community

1
1

answered Sep 03 '13 at 08:34

M.Sworna Vidhya

41
1
9

Rob van der Veer · Answer 3 · 2013-09-03T08:42:00.903

0

Did you try

@interface BlaBlaViewController : UIViewController<SettingsViewDelegate>

I saw in your code:

-(void)setDelegate:(id)delegate
{
   self.delegate = delegate;
}

This would result in an endless loop. You should use the synthesized _ivar for overloading the setter (or leave it out all together).

edited Sep 03 '13 at 08:42

answered Sep 03 '13 at 08:36

Rob van der Veer

1,148
1
7
20

score 0 · Accepted Answer · answered Sep 03 '13 at 09:29

0

Mistake found. It was in IB. I was setting Custom Class (SettingView) to File's Owner's Class. Now Its View's Custom Class and File's Owner is UIView's Class.

enter image description here

and now its working fine. .

answered Sep 03 '13 at 09:29

Blind Ninja

1,063
13
28

Inoka · Answer 5 · 2013-09-03T10:01:24.367

0

Use the following setter method for delegate in the SettingsView implementation.

-(void)setDelegate:(id)adelegate 
{
    _delegate = adelegate;
}

edited Sep 03 '13 at 10:01

answered Sep 03 '13 at 09:54

Inoka

664
7
16

score 0 · Answer 6 · answered Aug 27 '15 at 12:15

Try this -

.h

@protocol  SettingViewDelegate

-(void)CornerSlider:(id)sender;
-(void)MarginSlider:(id)sender;
-(void)BorderSlider:(id)sender;
-(void)ShadowSlider:(id)sender;
-(void)BorderColor:(id)sender;
-(void)ShadowColor:(id)sender;
-(void)remove:(id)sender;
@end

@interface SettingView : UIView

@property (nonatomic, assign) id  delegate;

-(IBAction)CornerSlider1:(id)sender;
-(IBAction)MarginSlider1:(id)sender;
-(IBAction)BorderSlider1:(id)sender;
-(IBAction)ShadowSlider1:(id)sender;
-(IBAction)BorderColor1:(id)sender;
-(IBAction)ShadowColor1:(id)sender;
-(IBAction)remove1:(id)sender;

@end

.m

-(IBAction)CornerSlider1:(id)sender
{
    if([self.delegate respondsToSelector:@(CornerSlider:)])
    {
        [self.delegate CornerSlider:sender];
    }
}
-(IBAction)MarginSlider1:(id)sender
{
    if([self.delegate respondsToSelector:@(MarginSlider:)])
    {
        [self.delegate MarginSlider:sender];
    }

}
-(IBAction)BorderSlider1:(id)sender
{
    if([self.delegate respondsToSelector:@(BorderSlider:)])
    {
        [self.delegate BorderSlider:sender];
    }

}
-(IBAction)ShadowSlider1:(id)sender
{
    if([self.delegate respondsToSelector:@(ShadowSlider:)])
    {
        [self.delegate ShadowSlider:sender];
    }

}
-(IBAction)BorderColor1:(id)sender{
    if([self.delegate respondsToSelector:@(BorderColor:)])
    {
        [self.delegate BorderColor:sender];
    }

}
-(IBAction)ShadowColor1:(id)sender{
    if([self.delegate respondsToSelector:@(ShadowColor:)])
    {
        [self.delegate ShadowColor:sender];
    }

}
-(IBAction)remove1:(id)sender{
    if([self.delegate respondsToSelector:@(remove:)])
    {
        [self.delegate remove:sender];
    }

}

The issue was in `.XIB` file. See my answer below. – Blind Ninja Aug 27 '15 at 12:20 — Blind Ninja, Aug 27 '15 at 12:20

Crash on Setting Delegate

6 Answers6

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