自定义annotationView
最简单的用法
在viewForAnnotation方法中，建立一个MKAnnotationView对象，并修改其image属性为想要的图片。返回此对象。
自定义MKAnnotationView
建立一个类，继承于MKAnnotationView，设置它的self.image属性。
annotationView的位置
默认为View的中心，所以如果想让图片下方的箭头在坐标上，需要设置centerOffset属性：
self.centerOffset = CGPointMake(0, -20);
自定义calloutView
默认的calloutView
设置annotationView的canShowCallout属性为YES。点击annotation时候就会弹出calloutView。此calloutView会显示两个label，分别是annotation的title和subtitle。
可以简单定制此calloutView，通过设置annotationView的leftCalloutAccessoryView和rightCalloutAccessoryView为calloutView加上左边和右边的view。
（是否可以把title设置为nil，完全通过calloutAccessoryView定制calloutView？）
动态修改calloutView的label
遍历calloutView的subViews，找到UILabel类型的subView，修改其文本即可。
完全自定义的calloutView
整体原理：设置annotationView的canShowCallout为NO。点击此annotationView时（Select），在相同的坐标增加一个新的annotation。取消点击时（
Deselect），删除此annotation。此annotation的annotationView画为自定义的annotation。
1.选择annotation：-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{
if ([view.annotation isKindOfClass:[DearAnnotation class]]) {
if (calloutAnnotation) {
[mapView removeAnnotation:calloutAnnotation];
calloutAnnotation = nil;
}
DearPeropertyItem *item;
for (item in dearArray){
if (view.annotation == item.annotation){
break;
}
}
calloutAnnotation = [[DearCallOutAnnotation alloc]initWithLocation:item.annotation.coordinate];
calloutDear = item;
if (item.annotation.timer != nil){
item.annotation.calloutAnno = calloutAnnotation;
item.annotation.moveCallOut = YES;
}
[mapView addAnnotation:calloutAnnotation];
}
}
2.取消选择annotation：-(void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view
-(void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view{
if (calloutAnnotation){
[mapView removeAnnotation:calloutAnnotation];
calloutAnnotation = nil;
}
}
3.自定义annotationView作为calloutView，在viewForAnnotation时返回
包含绘制calloutView的外框和箭头
//
// DearCallOutView.m
// Here
//
// Created by 王栋 on 14/11/4.
// Copyright (c) 2014年 王栋. All rights reserved.
//
#import "DearCallOutView.h"
@implementation DearCallOutView
#define Arror_height 6
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
-(id)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier Name:(NSString *)name{
self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
if (self) {
UIFont *font = [UIFont systemFontOfSize:11];
CGSize size = [name sizeWithFont:font constrainedToSize:CGSizeMake(MAXFLOAT, 20)];
// CGSize size = [str sizeWithFont:label.font constrainedToSize:CGSizeMake(label.frame.size.width, MAXFLOAT) lineBreakMode:NSLineBreakByWordWrapping];
self.backgroundColor = [UIColor clearColor];
self.canShowCallout = NO;
self.centerOffset = CGPointMake(0, -58-20);
self.frame = CGRectMake(0, 0, 200, 58+6);
self.contentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height-6)];
self.contentView.layer.cornerRadius = 10;
// self.contentView.backgroundColor = [UIColor whiteColor];
self.contentView.clipsToBounds = YES;
// [self.contentView.layer setBorderWidth:0.5];
// [self.contentView.layer setBorderColor:[[UIColor lightGrayColor] CGColor]];
UIColor *color = [UIColor colorWithRed:0 green:122/255.0 blue:1 alpha:1];
_timeLabel = [[UILabel alloc]initWithFrame:CGRectMake(7, 7, 55, 11)];
_timeLabel.font = [UIFont systemFontOfSize:11];
_timeLabel.textColor = color;
_timeLabel.text = @"20s前";
_nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(55+14, 7, size.width, 11)];
_nameLabel.font = [UIFont systemFontOfSize:11];
_nameLabel.textColor = color;
_distanceLabel = [[UILabel alloc]initWithFrame:CGRectMake(7, 24 , 55, 27)];
_distanceLabel.font = [UIFont systemFontOfSize:27];
_weizhiLabel = [[UILabel alloc]initWithFrame:CGRectMake(55+14, 24, 200-21-55, 27)];
_weizhiLabel.font = [UIFont systemFontOfSize:11];
_weizhiLabel.lineBreakMode = NSLineBreakByWordWrapping|NSLineBreakByTruncatingTail;
_weizhiLabel.numberOfLines = 0;
_weizhiLabel.textColor = [UIColor darkGrayColor];
UIImageView *bluetooth = [[UIImageView alloc]initWithFrame:CGRectMake(200-7-23-7-21, 8, 21, 10)];
bluetooth.image = [UIImage imageNamed:@"image_track_bluetooth_signal_3.png"];
UIImageView *battery = [[UIImageView alloc]initWithFrame:CGRectMake(200-7-23, 8, 23, 9)];
battery.image = [UIImage imageNamed:@"image_track_battery_background.png"];
_batteryIndicator = [[UIView alloc]initWithFrame:CGRectMake(1, 1, 19, 7)];
_batteryIndicator.backgroundColor = color;
[battery addSubview:_batteryIndicator];
[self.contentView addSubview:_timeLabel];
[self.contentView addSubview:_nameLabel];
[self.contentView addSubview:_distanceLabel];
[self.contentView addSubview:_weizhiLabel];
[self.contentView addSubview:battery];
[self.contentView addSubview:bluetooth];
[self addSubview:self.contentView];
return self;
}
return nil;
}
- (UIImage*)createImageWithPic:(UIImageView*)pic inImage:(UIImage*)annoImage{
UIGraphicsBeginImageContextWithOptions(annoImage.size, NO, 0.0);
CGContextRef context = UIGraphicsGetCurrentContext();
[annoImage drawInRect:CGRectMake(0, 0, annoImage.size.width, annoImage.size.height)];
CGContextTranslateCTM(context, 2, 2);
[pic.layer renderInContext:context];
CGContextTranslateCTM(context, -2, -2);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (void)setBattery:(NSInteger)battery{
CGRect frame = _batteryIndicator.frame;
frame.size.width = 19.0/100*battery;
_batteryIndicator.frame = frame;
}
-(void)drawRect:(CGRect)rect{
[self drawInContext:UIGraphicsGetCurrentContext()];
}
-(void)drawInContext:(CGContextRef)context
{
CGContextSetLineWidth(context, 2.0);
CGContextSetFillColorWithColor(context, [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0].CGColor);
[self getDrawPath:context];
CGContextFillPath(context);
}
- (void)getDrawPath:(CGContextRef)context//自定义annotation calloutView的边框
{
CGContextSetStrokeColorWithColor(context, [UIColor lightGrayColor].CGColor);
CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
CGContextSetLineWidth(context, 0.5);
CGRect rrect = self.bounds;
CGFloat radius = 10;
CGFloat minx = CGRectGetMinX(rrect),
midx = CGRectGetMidX(rrect),
maxx = CGRectGetMaxX(rrect);
CGFloat miny = CGRectGetMinY(rrect),
// midy = CGRectGetMidY(rrect),
maxy = CGRectGetMaxY(rrect)-Arror_height;
CGContextMoveToPoint(context, midx+Arror_height, maxy);
CGContextAddLineToPoint(context,midx, maxy+Arror_height);
CGContextAddLineToPoint(context,midx-Arror_height, maxy);
CGContextAddArcToPoint(context, minx, maxy, minx, miny, radius);
CGContextAddArcToPoint(context, minx, miny, maxx, miny, radius);
CGContextAddArcToPoint(context, maxx, miny, maxx, maxx, radius);
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
CGContextAddLineToPoint(context, midx+Arror_height, maxy);
CGContextFillPath(context);
CGContextClosePath(context);
CGContextMoveToPoint(context, midx+Arror_height, maxy);
CGContextAddLineToPoint(context,midx, maxy+Arror_height);
CGContextAddLineToPoint(context,midx-Arror_height, maxy);
CGContextAddArcToPoint(context, minx, maxy, minx, miny, radius);
CGContextAddArcToPoint(context, minx, miny, maxx, miny, radius);
CGContextAddArcToPoint(context, maxx, miny, maxx, maxx, radius);
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
// CGContextAddLineToPoint(context, midx+Arror_height, maxy);
CGContextClosePath(context);
CGContextStrokePath(context);
}
@end