[英]draw as well as addSubview in a UIView
嗨,我想使用Interface Builder在UIView上添加两个按钮,并在这两个按钮之间绘制一条线。 这怎么可能? 请提出建议。 谢谢
一个不使用drawrect的简单选项是将一个薄UIView放在两个按钮之间。 将视图的背景色设置为所需的线条颜色。
编辑:
您仍然可以使用瘦UIView并根据需要切换其可见性。
如果仍然要绘制线条,则可能需要创建一个自定义UIView。
@interface CustomView : UIView {
UIButton *button1;
UIButton *button2;
}
@end
@implementation CustomView
- (id) initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn1.frame = CGRectMake(20, 5, 80, 30);
[btn1 setTitle:@"Button1" forState:UIControlStateNormal];
[btn1 addTarget:self action:@selector(buttonPressed:)
forControlEvents:UIControlEventTouchUpInside];
button1 = btn1;
[self addSubview:btn1];
UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn2.frame = CGRectMake(20, 60, 80, 30);
[btn2 setTitle:@"Button2" forState:UIControlStateNormal];
[btn2 addTarget:self action:@selector(buttonPressed:)
forControlEvents:UIControlEventTouchUpInside];
button2 = btn2;
[self addSubview:btn2];
}
return self;
}
-(void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
if (button1.selected)
CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);
else
CGContextSetRGBStrokeColor(context, 0.0, 1.0, 0.0, 1.0);
CGContextSetLineWidth(context, 1.0);
CGContextBeginPath(context);
CGContextMoveToPoint(context, 10.0, 45.0);
CGContextAddLineToPoint(context, 150.0, 45.0);
if (button1.selected)
{
CGContextAddLineToPoint(context, 180.0, 35.0);
}
CGContextDrawPath(context, kCGPathStroke);
}
-(void)buttonPressed:(UIButton *)button
{
button1.selected = !button1.selected;
button2.selected = !button2.selected;
[self setNeedsDisplay];
}
@end
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