相关疑难解决方法(0)

给定(任意):

CGRect frame = CGRectMake(0.0f, 0.0f, 100.0f, 30.0f);

以下两个代码片段之间的区别是什么？

1.

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = frame;

2.

    UIButton *button = [[[UIButton alloc] initWithFrame:frame] autorelease];

我试着弄清楚事情是如何运作的.所以我想当我用类别覆盖某些方法时,我会得到有趣的NSLogs.

@implementation UIView(Learning)
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    NSLog(@"-hitTest:withEvent: event=%@", event);
    return [self hitTest:point withEvent:event];
}
@end

超级和自我在这里不起作用.有没有办法调用-hitTest的原始实现:withEvent:？我想要的是NSLog每次-hitTest:withEvent:在UIView上调用.

这仅用于个人学习目的.我希望看到活动的实施.