UINavigationBar有两个圆角

Question

我已经看到了这个答案

https://stackoverflow.com/a/9243472/563381

虽然只要在导航栏的图层上设置遮罩就能很好地显示它，但它不再响应触摸......因此无法单击条上显示的后退按钮。任何导致触摸通过CALAyer的解决方案？我并不认为CALayer会受阻，或者面具会阻挡触摸。

Answer 1

好吧，我真的不知道为什么CALayer阻止触摸，这对我来说听起来很奇怪......

我绕过UINavigationBar的角落的方法是在角落放置2个UIImageView（10x10像素）并为它们添加2个图像。这些图像作为蒙版工作，不会阻挡触摸。如果使用抗锯齿来绘制图像，则外观非常完美。

Answer 2

您应该尝试使用此代码：

self.navigationController.navigationBar.translucent = YES;

这将打开你的后退按钮。你可以看到你的按钮，但它在另一层。这就是为什么它不会起作用的原因..

更新：

使用此行代码进行测试。这对你来说就像是一种魅力。

//Style UINavigationBar
UIView *background = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
background.backgroundColor = [UIColor blackColor];
[self.view addSubview:background];
self.navigationController.navigationBar.tintColor = [UIColor cyanColor];
self.navigationController.navigationBar.translucent = YES;
CALayer *capa = [self.navigationController navigationBar].layer;
[capa setShadowColor: [[UIColor blackColor] CGColor]];
[capa setShadowOpacity:0.85f];
[capa setShadowOffset: CGSizeMake(0.0f, 1.5f)];
[capa setShadowRadius:2.0f];  
[capa setShouldRasterize:YES];

//Round
CGRect bounds = capa.bounds;
bounds.size.height += 10.0f;    //I'm reserving enough room for the shadow
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds 
                                               byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight)
                                                     cornerRadii:CGSizeMake(10.0, 10.0)];

CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = bounds;
maskLayer.path = maskPath.CGPath;

[capa addSublayer:maskLayer];
capa.mask = maskLayer;

//Back Btn
UIButton *btnback = [UIButton buttonWithType:UIButtonTypeCustom];
[btnback setFrame:CGRectMake(0, 0, 54, 29)];
[btnback setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];
UILabel * btnlabel =  [[UILabel alloc]initWithFrame:CGRectMake(15, 0, 40, 23)];
btnlabel.backgroundColor = [UIColor clearColor];
btnlabel.textColor = [UIColor whiteColor];
btnlabel.font = [UIFont boldSystemFontOfSize:13];
btnlabel.text = @"back";
[btnback addSubview:btnlabel];
[btnback addTarget:self action:@selector(backHome:) forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:btnback];