How to set default values for IBInspectable in Objective-C?

Question

I know default values of IBInspectable-properties can be set as:

@IBInspectable var propertyName:propertyType = defaultValue in Swift. But how do I achieve a similar effect in Objective-C so that I can have default value of some property set to something in Interface Builder?

Answer 1

Since IBInspectable values are set after initWithCoder: and before awakeFromNib:, you can set the defaults in initWithCoder: method.

@interface MyView : UIView @property (copy, nonatomic) IBInspectable NSString *myProp; @property (assign, nonatomic) BOOL createdFromIB; @end  @implementation MyView  - (id)initWithCoder:(NSCoder *)aDecoder {     self = [super initWithCoder:aDecoder];     if(self != nil) {         self.myProp = @"foo";         self.createdFromIB = YES;     }     return self; }  - (void)awakeFromNib {     if (self.createdFromIB) {         //add anything required in IB-define way     }     NSLog(@"%@", self.myProp); }  @end 

Answer 2

I wrote my code like this. It works pretty well for me, both when designing in the interface builder or running as a app.

@interface MyView : UIView  @property (copy, nonatomic) IBInspectable propertyType *propertyName;  @end  - (void)makeDefaultValues {     _propertyName = defaultValue;     //Other properties... }  - (instancetype)initWithFrame:(CGRect)frame {     if (self = [super initWithFrame:frame]) {         [self makeDefaultValues];     }     return self; }  - (instancetype)initWithCoder:(NSCoder *)aDecoder {     if (self = [super initWithCoder:aDecoder]) {         [self makeDefaultValues];     }     return self; }