你如何找出保留仪器中物体的内容？ [英] How do you find out what is retaining an object in Instruments?

问题描述

我最近将我的iOS项目转换为ARC。其中一个视图控制器没有调用它的dealloc方法，并且没有按照仪器进行解除分类。

I've recently converted my iOS project over to ARC. One of the view controllers is not calling its dealloc method and is not being dealloc'ed according to Instruments.

我已经仔细检查了所有属性并设置了相应的属性弱者。我还确保将视图控制器作为委托的任何内容都在viewWillDisappear上取消设置，但视图仍然在内存中保留。

I've double checked all of my properties and set the appropriate ones to weak. I've also made sure that anything that has the view controller as a delegate has it unset on viewWillDisappear but the view still sticks around in memory.

我是新手在仪器上：我怎么知道保留这个观点的是什么？

I'm a newbie at Instruments: how can I tell what is retaining this view?

推荐答案

如果你真的被卡住并且程序很复杂（或者抽象，在ARC的情况下，你可以带出大炮：

Well if you are really stuck and the program is complex (or abstracted, in the case of ARC), you can bring out the cannons:

• 打开你的Xcode项目


• 选择可执行文件（如果需要）


• 按 cmd + i （个人资料）


• 选择Le Wizard中的'泄漏'工具（如果需要）


• 按Return键开始分析


• 锻炼你的应用


• 在工具中按停止


• 确认已选择分配工具


• 单击并按住名为的弹出按钮'统计'


• 选择对象列表项


• 找到您之间的分配在对象列表中的记录之中


• 选择该分配/对象


• 单击地址右侧的详细箭头该分配的表格视图单元格


• 现在您可以看到与分配相关的所有事件（分配，免费，引用计数操作）


• 按 cmd + shift + e for Extended Detail


• 浏览此列表中的事件，找到您寻求的不平衡。

• Open your Xcode project
• Choose the executable (if needed)
• Press cmd+i (Profile)
• Choose the 'Leaks' Instrument in Le Wizard (if needed)
• Press Return to begin profiling
• Exercise your app
• Press 'Stop' in Instruments
• Verify the 'Allocations' instrument is selected
• Click and Hold the Popup Button named 'Statistics'
• Select the Objects List item
• Locate the allocation you are interested in, among the records in the Objects List
• Select that allocation/object
• Click the 'detail arrow' to the right of the address in the table view cell of that allocation
• Now you see all events related to the allocation (allocation, free, reference count operations)
• Press cmd+shift+e for Extended Detail
• Go through the events in this list, and locate the imbalance you seek.

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