如何在iOS应用程序中与UIButton的特定区域进行交互

Question

我必须在点击按钮的特定区域时执行操作。实际上在只有粉红色可见的区域。不在该地区之外。请查看随附的图片以及此消息，如果我在任何时候都不清楚，请告诉我。

Answer 1

你应该对UIButton进行子类化并覆盖它的- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event区域几何的基础或访问按钮的图像并检查某个点的颜色。

看看这个：OBShapedButton

Answer 2

您可以添加自定义选择器，然后在那里获取触摸点。然后检查点是否在您的特定区域内。

[pinkButton addTarget:self action:@selector(buttonTouched:withEvent:) forControlEvents: UIControlEventTouchDown];
//Define the area here or get the exact frame if it is already a UIView
CGRect frameOfSpecificArea = CGRectMake(10, 20, 30, 40);
- (void)buttonTouched:(UIButton *)sender withEvent:event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint tapPoint = [touch locationInView:sender];
    NSLog(@"Pink Button touched x : %f y : %f", tapPoint.x, tapPoint.y);
    BOOL pointIsInside = CGRectContainsPoint(frameOfSpecificArea, tapPoint);
    if(pointIsInside) {
       NSLog(@"Yeah, i'm a great iOS-Developer, i can check if a point is inside a CGRect!");
    }
}

Answer 3

您需要创建自定义UIButton类并添加方法：

-(BOOL) pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    if(![super pointInside:point withEvent:event]) return NO;

    return [bezierPath containsPoint:point];
}

你按下的bazierPath可见区域。看看这个链接docs