iPhone应用内存泄漏问题

发布于 2024-11-03 03:23:57 字数 628 浏览 1 评论 0原文

我发现以下代码出现泄漏。

            cell.lblNoOfReplay.text=[NSString stringWithFormat:@"0 Replies. %@",(NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)[[NSString stringWithFormat:@"Last message on %@",[BabbleVilleAppDelegate dateByAddingHours:Babbleoffset withDate:[[arrayPMMainList objectAtIndex:[indexPath section]] objectForKey:@"datetime"]]] stringByReplacingOccurrencesOfString:@"+" withString:@" "], CFSTR(""), kCFStringEncodingUTF8)];

这里我没有分配任何字符串，但是当我检查内存泄漏时，上面的行中有一些泄漏。可能是由于 kCFAllocatorDefault 导致的，所以有些人遇到了同样的问题，请帮助我。

问候姆鲁根

原文

I am getting leaks on the following code.

            cell.lblNoOfReplay.text=[NSString stringWithFormat:@"0 Replies. %@",(NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)[[NSString stringWithFormat:@"Last message on %@",[BabbleVilleAppDelegate dateByAddingHours:Babbleoffset withDate:[[arrayPMMainList objectAtIndex:[indexPath section]] objectForKey:@"datetime"]]] stringByReplacingOccurrencesOfString:@"+" withString:@" "], CFSTR(""), kCFStringEncodingUTF8)];

Here i dont havent allocated any string but when i check for memory leaks there are some leaks in the above line .
Probably it may be due to kCFAllocatorDefault ,so of someome has come across the same issues , help me out .

Regards
Mrugen

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一个人的旅程 2024-11-10 03:23:57

是的，您已经分配了一个字符串。 Core Foundation 对象遵循创建规则：通过名称包含 Create 或 Copy 的函数获得的任何对象都由调用者拥有，并且必须由调用者在使用完毕后释放。

将代码更改为：

CFStringRef s = CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)[[NSString stringWithFormat:@"Last message on %@",[BabbleVilleAppDelegate dateByAddingHours:Babbleoffset withDate:[[arrayPMMainList objectAtIndex:[indexPath section]] objectForKey:@"datetime"]]] stringByReplacingOccurrencesOfString:@"+" withString:@" "], CFSTR(""), kCFStringEncodingUTF8);
cell.lblNoOfReplay.text=[NSString stringWithFormat:@"0 Replies. %@", (NSString *)s];
CFRelease(s);

另外，请考虑将该行分成多个部分和中间变量。其他看到该代码的人，包括未来的你，都会感谢你。

Yes, you have allocated a string. Core Foundation objects follow the Create rule: any object obtained via a function whose name contains either Create or Copy is owned by the caller and must be released by the caller when it’s finished using it.

Change your code to:

CFStringRef s = CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)[[NSString stringWithFormat:@"Last message on %@",[BabbleVilleAppDelegate dateByAddingHours:Babbleoffset withDate:[[arrayPMMainList objectAtIndex:[indexPath section]] objectForKey:@"datetime"]]] stringByReplacingOccurrencesOfString:@"+" withString:@" "], CFSTR(""), kCFStringEncodingUTF8);
cell.lblNoOfReplay.text=[NSString stringWithFormat:@"0 Replies. %@", (NSString *)s];
CFRelease(s);

Also, consider breaking that line into multiple pieces and intermediate variables. Other people that see that code, including your future self, will thank you.

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