直接上代码，你的得偿所愿：
- (void)showBubbleWithPoint:(CGPoint)thePoint text:(NSString*)text borderColor:(UIColor*)borderColor textColor:(UIColor*)textColor isMain:(BOOL)isMain {
if(isMain) {
for(CALayer*layerinself.mainBubbleLayerArray) {
[layerremoveFromSuperlayer];
}
}else{
for(CALayer*layerinself.bubbleLayerArray) {
[layerremoveFromSuperlayer];
}
}
CGFloatsuggestHeight = [MMUtilscalTextRectWithString:textlineSpacing:3fontSize:10boundingRectSize:CGSizeMake(kValueBetween,CGFLOAT_MAX)].size.height;
CGPointpoint =CGPointZero;
if(thePoint.y< (suggestHeight +3)) {
point =CGPointMake(thePoint.x, suggestHeight +3);
}else{
point =CGPointMake(thePoint.x, thePoint.y);
}
UIBezierPath*path = [UIBezierPathbezierPath];
[pathmoveToPoint:point];
[pathaddLineToPoint:CGPointMake(point.x-3, point.y-3)];
[pathaddLineToPoint:CGPointMake(point.x-(kValueBetween/2)+3, point.y-3)];
[pathaddArcWithCenter:CGPointMake(point.x-(kValueBetween/2)+3, point.y-6)radius:3startAngle:0.5*M_PIendAngle:1*M_PIclockwise:YES];
[pathaddLineToPoint:CGPointMake(point.x- (kValueBetween/2), point.y- suggestHeight)];
[pathaddArcWithCenter:CGPointMake(point.x-(kValueBetween/2)+3, point.y- suggestHeight)radius:3startAngle:1*M_PIendAngle:1.5*M_PIclockwise:YES];
[pathaddLineToPoint:CGPointMake(point.x+(kValueBetween/2)-3, point.y- suggestHeight -3)];
[pathaddArcWithCenter:CGPointMake(point.x+(kValueBetween/2)-3, point.y- suggestHeight)radius:3startAngle:1.5*M_PIendAngle:2*M_PIclockwise:YES];
[pathaddLineToPoint:CGPointMake(point.x+(kValueBetween/2), point.y-6)];
[pathaddArcWithCenter:CGPointMake(point.x+(kValueBetween/2)-3, point.y-6)radius:3startAngle:0*M_PIendAngle:0.5*M_PIclockwise:YES];
[pathaddLineToPoint:CGPointMake(point.x+3, point.y-3)];
[pathaddLineToPoint:CGPointMake(point.x, point.y)];
CAShapeLayer*shapeLayer = [CAShapeLayerlayer];
shapeLayer.strokeColor= borderColor.CGColor;
shapeLayer.fillColor= [UIColorwhiteColor].CGColor;
shapeLayer.lineWidth=1;
shapeLayer.lineJoin=kCALineJoinRound;
shapeLayer.lineCap=kCALineCapRound;
shapeLayer.path= path.CGPath;
shapeLayer.zPosition=1;
[self.bgView.layeraddSublayer:shapeLayer];
if(isMain) {
[self.mainBubbleLayerArrayaddObject:shapeLayer];
}else{
[self.bubbleLayerArrayaddObject:shapeLayer];
}
CATextLayer*txtLayer = [CATextLayerlayer];
txtLayer.string= text;
txtLayer.frame=CGRectMake(point.x-(kValueBetween/2), point.y- suggestHeight -3,kValueBetween, suggestHeight);
txtLayer.backgroundColor= [UIColorclearColor].CGColor;
txtLayer.foregroundColor= textColor.CGColor;
txtLayer.fontSize=10;
txtLayer.alignmentMode=kCAAlignmentCenter;
txtLayer.contentsScale= [UIScreenmainScreen].scale;
txtLayer.zPosition=1;
[self.bgView.layeraddSublayer:txtLayer];
if(isMain) {
[self.mainBubbleLayerArrayaddObject:txtLayer];
}else{
[self.bubbleLayerArrayaddObject:txtLayer];
}
}