むい空間

@interface MyButton : UIButton
@end

@implementation MyButton
- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        NSLog(@"(´ω｀*)");
    }
    return self;
}
@end

NSLog(@"%@", [[[MyButton alloc] init] autorelease]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeCustom]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeRoundedRect]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeDetailDisclosure]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeInfoLight]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeInfoDark]);
NSLog(@"%@", [MyButton buttonWithType:UIButtonTypeContactAdd]);

iPhone SDK 3.0 + Simulator 3.0 での実行ログ。

(´ω｀*)
<MyButton: 0xd1aea0; baseClass = UIButton; frame = (0 0; 0 0); opaque = NO; layer = <CALayer: 0xd18f70>>
(´ω｀*)
<MyButton: 0xd1d460; baseClass = UIButton; frame = (0 0; 0 0); opaque = NO; layer = <CALayer: 0xd1dcf0>>
<UIRoundedRectButton: 0xd1d920; frame = (0 0; 0 0); opaque = NO; layer = <CALayer: 0xd1d600>>
<UIButton: 0xd27c30; frame = (0 0; 29 31); opaque = NO; layer = <CALayer: 0xd19d60>>
<UIButton: 0xd28cd0; frame = (0 0; 18 19); opaque = NO; layer = <CALayer: 0xd28d50>>
<UIButton: 0xd29790; frame = (0 0; 18 19); opaque = NO; layer = <CALayer: 0xd295a0>>
<UIButton: 0xd29ca0; frame = (0 0; 29 29); opaque = NO; layer = <CALayer: 0xd29a40>>

buttonWithType: で MyButton のインスタンスが返されるのは引数が UIButtonTypeCustom の時だけか……