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错误“在类型为“ MyAnnotation”的对象上找不到属性“标题””

[英]Error “ Property 'title' not found on object of type 'MyAnnotation' ”

原文 2012-02-27 21:12:55 1 1 ios/ xcode/ mkmapview/ mapkit/ mkannotation

I'm following this tutorial http://mayurbirari.wordpress.com/2011/02/07/how-to-access-mkmapkit-in-iphone/ to set annotations on a map in my IOS app , but I got 13 errors : 我正在按照本教程http://mayurbirari.wordpress.com/2011/02/07/how-to-access-mkmapkit-in-iphone/在IOS应用程序中的地图上设置注释，但出现13个错误：

" Property 'title' not found on object of type 'MyAnnotation' " ( 4 times ) “在类型为“ MyAnnotation”的对象上找不到属性“标题””（4次）
" Property 'subtitle' not found on object of type 'MyAnnotation' " ( 4 times ) “在类型为'MyAnnotation'的对象上找不到属性'subtitle'”（4次）
" Property 'coordinate' not found on object of type 'MyAnnotation' " (4 times ) “在类型为'MyAnnotation'的对象上找不到属性'coordinate'（4次）
" Property 'coordinate' not found on object of type 'id' " ( 1 time) “在类型'id'的对象上找不到属性'coordinate'（1次）

I get those mistakes one time for each annotation, and I've added 4 annotations ( that's why there are 4 times each mistake). 对于每个注解，我都会一次得到这些错误，并且我添加了4个注解（这就是每个错误有4次的原因）。 I really don't know what to do , I've tried many things but It didn't work . 我真的不知道该怎么做，我已经尝试了很多东西，但是没用。 I'm a beginner in Objective-C so it is probably a really stupid mistake but I can't see it ! 我是Objective-C的初学者，所以这可能是一个非常愚蠢的错误，但我看不到！

Pictures of the code: 代码图片：

viewDidLoad - part 1 viewDidLoad-第1部分
viewDidLoad - part 2 viewDidLoad-第2部分
ViewController.h ViewController.h
MyAnnotation.m MyAnnotation.m
MyAnnotation.h MyAnnotation.h

1 个解决方案

Your annotation objects should be objects that conform to the MKAnnotation protocol. 您的注释对象应该是符合MKAnnotation协议的对象。 I'm guessing that your implementation of the protocol methods is not compliant. 我猜想您对协议方法的实现不兼容。

Show what you have for those methods (which should be within your MyAnnotation object), if you don't see any obvious errors along this line of thought. 如果您没有发现任何明显的错误，请说明这些方法的用途（应该在MyAnnotation对象中）。