“无法恢复先前选择的帧”在循环遍历NSDictionary时 [英] "Unable to restore previously selected frame" when looping through NSDictionary

问题描述

我的应用中出现以下错误：

I got the following errors in my app:

warning:Unable to restore previously selected frame
warning:Unable to restore previously selected frame

：

NSDictionary *feed = [json_parser objectWithString:json_str error:nil];
for(NSDictionary *feed_item in [feed objectForKey:@"items"])
{
    PropertyData *propertyData; // mere data model class with properties only,no methods
    [propertyData release];
}

这条线突出显示线程1：程序收到信号：EXC_BAD_ACCESS

[propertyData release];

解析之前json字符串如下所示（因此您可以了解数据的结构，解析但工作正常）：

the json string looks like the following before parsing (so you may understand how data are structured, the parsing works fine though):

{
    "total":110,"page":1,
    "items":[
        {"pid":"1349","price":"52,000","type":"Apartment","beds":"","descr1":"<p></p>"},
        {"pid":"1349","price":"52,000","type":"Apartment","beds":"","descr1":"<p></p>"},
        {"pid":"1349","price":"52,000","type":"Apartment","beds":"","descr1":"<p></p>"}
    ]
}

对于什么是错误的任何想法？

Any idea of what's wrong ?

Thx的帮助，

Stephane

推荐答案

您没有分配/初始化PropertyData。指针指的是内存中的一些随机位置，然后你发送它释放消息，导致EXC_BAD_ACCESS，

You are not allocating/initializing PropertyData. The pointer is referring to some random place in memory, and then you are sending it "release" message which causes the EXC_BAD_ACCESS,

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