如何在Objective-C中设置IBInspectable的默认值？ [英] How to set default values for IBInspectable in Objective-C?

问题描述

我知道IBInspectable-properties的默认值可以设置为：

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

@IBInspectable var propertyName：propertyType = defaultValue 在斯威夫特。但是我如何在Objective-C中实现类似的效果，以便我可以在Interface Builder中将某个属性的默认值设置为某个？

@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?

推荐答案

由于 IBInspectable 值是在 initWithCoder：之后和之前设置的awakeFromNib：，您可以在 initWithCoder：方法中设置默认值。

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

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