tl; dr
我只想知道是否有任何方法可以禁用用户交互。
这是场景:
-
我有两个视图查看a ,查看b ,两个都是等于宽度 and 等高的高度。
-
视图b在视图a。
的顶部 我在>上使用掩码(CASHAPELAYER) on view b 在底部查看的内容(两个按钮)>
由于 view b 有一个掩码,因此我只能看到 view a 的内容,但是我无法与之交互。
任何帮助将不胜感激。谢谢。
使您将b视为清晰的颜色,然后在您的项目uiview colorofpoint中尝试 UIView+ColorOfPoint.h
和 UIView+ColorOfPoint.m
文件,以及视图控制器或视图的子类中的代码。下面的代码 uiview子类(自定义类)。
#pragma mark - Hit testing
- (BOOL)isAlphaVisibleAtPoint:(CGPoint)point forImage:(UIView *)view
{
// Correct point to take into account that the image does not have to be the same size
// as the button. See https://github.com/ole/OBShapedButton/issues/1
CGSize iSize = view.bounds.size;
CGSize bSize = self.bounds.size;
point.x *= (bSize.width != 0) ? (iSize.width / bSize.width) : 1;
point.y *= (bSize.height != 0) ? (iSize.height / bSize.height) : 1;
UIColor *pixelColor = [view colorOfPoint:point];
CGFloat alpha = 0.0;
if ([pixelColor respondsToSelector:@selector(getRed:green:blue:alpha:)])
{
// available from iOS 5.0
[pixelColor getRed:NULL green:NULL blue:NULL alpha:&alpha];
}
else
{
// for iOS < 5.0
// In iOS 6.1 this code is not working in release mode, it works only in debug
// CGColorGetAlpha always return 0.
CGColorRef cgPixelColor = [pixelColor CGColor];
alpha = CGColorGetAlpha(cgPixelColor);
}
return alpha >= kAlphaVisibleThreshold;
}
// UIView uses this method in hitTest:withEvent: to determine which subview should receive a touch event.
// If pointInside:withEvent: returns YES, then the subview’s hierarchy is traversed; otherwise, its branch
// of the view hierarchy is ignored.
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
// Return NO if even super returns NO (i.e., if point lies outside our bounds)
BOOL superResult = [super pointInside:point withEvent:event];
if (!superResult) {
return superResult;
}
// Don't check again if we just queried the same point
// (because pointInside:withEvent: gets often called multiple times)
if (CGPointEqualToPoint(point, self.previousTouchPoint)) {
return self.previousTouchHitTestResponse;
} else {
self.previousTouchPoint = point;
}
BOOL response = NO;
if (self == nil) {
response = YES;
}
else if (self!= nil) {
response = [self isAlphaVisibleAtPoint:point forImage:self];
}
else {
if ([self isAlphaVisibleAtPoint:point forImage:self]) {
response = YES;
} else {
response = [self isAlphaVisibleAtPoint:point forImage:self];
}
}
self.previousTouchHitTestResponse = response;
return response;
}
- (void)resetHitTestCache
{
self.previousTouchPoint = CGPointMake(CGFLOAT_MIN, CGFLOAT_MIN);
self.previousTouchHitTestResponse = NO;
}