UIPickerView没有出现,直到触摸时
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06-09-2019 - |
题
我编程添加两个定制UIPickerViews到另一个视图(的MainView)。他们工作得很好,但直到触摸事件中的MainView的任何部位发生,他们是不可见的。我检查了UIPickerView和UIView的类的引用,但没有发现任何东西,它成功地“刷新”的观点,除非我失去了一些东西明显?
下面是在MainView.m我的drawRect方法。我试过在viewDidLoad中,但没有成功做同样的事情。可以在自定义转/变换等有什么关系呢?
- (void)drawRect:(CGRect)rect {
CGRect pickerFrame = CGRectMake(50, -32, 30, 180);
m_picker1 = [[UIPickerView alloc] initWithFrame:pickerFrame];
m_picker1.delegate = self;
m_picker1.tag = k_ptag1;
m_picker1.showsSelectionIndicator =YES;
m_picker1.backgroundColor = [UIColor clearColor];
CGAffineTransform rotate = CGAffineTransformMakeRotation(3.14/2);
rotate = CGAffineTransformScale(rotate, 0.075, 0.85);
[m_picker1 setTransform:rotate];
[self addSubview:m_picker1];
pickerFrame = CGRectMake(50, 67, 30, 180);
m_picker2 = [[UIPickerView alloc] initWithFrame:pickerFrame];
m_picker2.delegate = self;
m_picker2.tag = k_ptag2;
m_picker2.showsSelectionIndicator =YES;
m_picker2.backgroundColor = [UIColor clearColor];
rotate = CGAffineTransformMakeRotation(3.14/2);
rotate = CGAffineTransformScale(rotate, 0.075, 0.85);
[m_picker2 setTransform:rotate];
[self addSubview:m_picker2];
}
解决方案
您在视图的控制器添加子视图,而不是视图本身。我建议用MVC设计模式熟悉自己。
的drawRect只应该被用于视图本身的实际的绘制,而不是子视图。
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