一些零碎的笔记

4、自定义BMKAnnotationView点击没有响应的问题

3、数组越界导致崩溃，查找源头

点击debug->BreakPoints->Create Exception BreakPoints，然后重新运行，断点就停留在导致崩溃的地方

2、通过UIBezierPath来设置圆角

通过设置圆角，一般会这样用：

self.button.layer.cornerRadius = self.button.frame.size.height / 2.0;

self.button.clipsToBounds = YES;

但要设置下图这样的圆角方式，上面的方法就不行了

设置圆角

UIBezierPath *maskPath =[UIBezierPath bezierPathWithRoundedRect:self.button.bounds byRoundingCorners:UIRectCornerBottomRight | UIRectCornerTopRight cornerRadii:CGSizeMake(self.button.bounds.size.height/2, self.button.bounds.size.height/2)];

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];

maskLayer.frame = self.button.bounds;

maskLayer.path = maskPath.CGPath;

self.button.layer.mask = maskLayer;

其中，这些可以根据需要设置

UIRectCornerTopLeft    = 1 << 0,

UIRectCornerTopRight    = 1 << 1,

UIRectCornerBottomLeft  = 1 << 2,

UIRectCornerBottomRight = 1 << 3,

UIRectCornerAllCorners

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1、调整leftBarItem的点击范围

自定义一个Button，将这个Button加入到View中，再将View添加到leftBarItem里面。

UIButton*closeBtn = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[closeBtnsetImage:[UIImageimageNamed:@"publish_close"]forState:UIControlStateNormal];

[closeBtnaddTarget:selfaction:@selector(closeAction)forControlEvents:UIControlEventTouchUpInside];

closeBtn.frame=CGRectMake(0,0,44,44);

UIView*leftBackBtnView = [[UIViewalloc]initWithFrame:closeBtn.bounds];

leftBackBtnView.bounds=CGRectOffset(leftBackBtnView.bounds,10,0);

[leftBackBtnViewaddSubview:closeBtn];

self.navigationItem.leftBarButtonItem= [[UIBarButtonItemalloc]initWithCustomView:leftBackBtnView];