Question

我正在使用drawRect＆amp ;;在UIView中绘制一条线。 BezierPath。我还有一个带有contentview1和contentview2的分段控制器。我希望该行显示在内容view1中，但不是contentview2。我的行代码在uiview文件中，而分段控件在uiviewcontroller中。如何成功隐藏2个内容视图之间的界限。

InformationView.m（UIView）

- (void)drawRect:(CGRect)rect {

UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(10.0, 10.0)];
[path addLineToPoint:CGPointMake(100.0, 100.0)];
path.lineWidth = 3;
[[UIColor blueColor] setStroke];
[path stroke];

}

InformationViewController.m（UIViewController）

segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
segmentedControl.frame = CGRectMake(12, 80, 300, 30);
[segmentedControl addTarget:self action:@selector(segmentAction) forControlEvents: UIControlEventValueChanged];
segmentedControl.selectedSegmentIndex = 0;
[self.view addSubview:contentView2];
[self.view addSubview:contentView ];

-(void) segmentAction {

if (segmentedControl.selectedSegmentIndex == 0) {

    [contentView setHidden:NO;
    [contentView2 setHidden:YES];


}
if (segmentedControl.selectedSegmentIndex == 1) {

    [contentView setHidden:YES];
    [contentView2 setHidden: NO];
}

我不想将这一行添加到contentview中，因此当选择另一个视图时它将被隐藏。

Answer 1

将属性添加到InformationView

·H

@interface InformationView : UIView

@property (assign, nonatomic ,getter=isLineHidden) BOOL lineHidden;

@end

的.m

@implementation InformationView

- (void)drawRect:(CGRect)rect {
    if (self.lineHidden == false) {
        UIBezierPath *path = [UIBezierPath bezierPath];
        [path moveToPoint:CGPointMake(10.0, 10.0)];
        [path addLineToPoint:CGPointMake(100.0, 100.0)];
        path.lineWidth = 3;
        [[UIColor blueColor] setStroke];
        [path stroke];
    }
}

-(void)setLineHidden:(BOOL)lineHidden{
    if (_lineHidden != lineHidden) {
        _lineHidden = lineHidden;
        [self setNeedsDisplay];
     }
}

@end

然后，当你想隐藏线

 self.yourView.lineHidden = true;

在分段控件之间切换时隐藏线

1 个答案: