先上一个效果图
2986906-5ba5a85f708afb54.png
- (instancetype)initWithFrame:(CGRect)frame{
if (self = [super initWithFrame:frame]) {
self.backgroundColor = [UIColor clearColor];
//这里可以设置你要在气泡view上显示的内容
}
return self;
}
//通过drawRect 画一个 带箭头的气泡框
- (void)drawRect:(CGRect)rect {
[self drawInContext:UIGraphicsGetCurrentContext()];
self.layer.shadowColor = [[UIColor clearColor] CGColor];
self.layer.shadowOpacity = 1.0;
self.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);
}
-(void)drawInContext:(CGContextRef)context{
CGContextSetLineWidth(context, 2.0);
CGContextSetFillColorWithColor(context, [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5].CGColor);
[self getDrawPath:context];
CGContextFillPath(context);
}
-(void)getDrawPath:(CGContextRef)context{
CGRect rrect = self.bounds;
CGFloat radius = 20.0;
CGFloat minx = CGRectGetMinX(rrect),
midx = CGRectGetMidX(rrect),
maxx = CGRectGetMaxX(rrect);
CGFloat miny = CGRectGetMinY(rrect),
maxy = CGRectGetMaxY(rrect)-10;
CGContextMoveToPoint(context, midx+10, maxy);
CGContextAddLineToPoint(context, midx, maxy+10);
CGContextAddLineToPoint(context, midx-10, maxy);
CGContextAddArcToPoint(context, minx, maxy, minx, miny, radius);
CGContextAddArcToPoint(context, minx, miny, maxx, miny, radius);
CGContextAddArcToPoint(context, maxx, miny, maxx, maxy, radius);
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
CGContextClosePath(context);
}
