Question

My class is subclass of UIImageView. I create my custom initializer like this

@interface FishView : UIImageView
@end

@implementation FishView

- (id)initWithFishType:(FishType)fishType {

    self = [super init];
    if (self) {
        //my custom initialization
    }
    return self;

}

是否有必要凌驾于无私状态?

- (id)initWithImage:(UIImage)image
{
    self = [super initWithImage:image];
    if (self) {
        [self initWithFishType:FTNone];
    }
    return self;
}

Answer 1

只有当你计划把 in在你的法典中,并且希望它做些什么。

Answer 2

You only need to override if you want extra functionality in there.

But if I am reading your question as: "I need custom init functionality, shall it go in initWithImage or initWithFrame? then the answer is more complicated. Then you would actually need to override a bunch of initializers, see

What if a class has no documented designated initializer?

Answer 3

快速2年,<代码>的唯一必要初始用户缩略语

required init?(coder: NSCoder) { super.init(coder: coder) }

友情链接