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我构建了一个简单的应用程序，它从HockeyApp获取报告。但是，当我使用内存泄漏工具运行应用程序时，它显示执行getReport操作时发生内存泄漏。我无法理解仪器中显示的所有信息。如何修复Objective-C中的内存泄漏？
这里是这会导致内存泄漏按钮动作方法：
- (IBAction)getReports:(id)sender {
//initialize url that is going to be fetched.
NSURL *url = [NSURL URLWithString:@"https://rink.hockeyapp.net/api/2/apps/APP_ID/crash_reasons"];
//initialize a request from url
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request addValue:tokenReceived forHTTPHeaderField:@"X-HockeyAppToken"];
[request setHTTPMethod:@"GET"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
//initialize a connection from request
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
self.getReportConnection = connection;
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData*)data{
if (connection==getReportConnection) {
[self.receivedData appendData:data];
NSLog(@"data is %@",data);
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSError *e = nil;
NSData *jsonData = [responseString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:jsonData options: NSJSONReadingMutableContainers error: &e];
NSLog(@"login json is %@",JSON);
NSLog(@"reason json is %@",JSON[@"reason"]);
[JSON[@"crash_reasons"] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
[reportArray addObject:obj[@"reason"]];
NSLog(@"index = %lu, Object For title Key = %@", (unsigned long)idx, obj[@"reason"]);
}];
NSError *error = nil;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:jsonData
options:kNilOptions error:&error];
if (error != nil) {
NSLog(@"Error parsing JSON.");
}
else {
NSLog(@"Array: %@,array count is %d", jsonArray,jsonArray.count);
}
// [reportArray addObject:[jsonArray objectAtIndex:0]];
if (JSON!=NULL) {
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Reports succesfully retrieved" message:@"" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
[alert show];
}
}
}
// This method receives the error report in case of connection is not made to server.
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
UIAlertView *errorAlert=[[UIAlertView alloc]initWithTitle:@"Wrong Login" message:nil delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil];
[errorAlert show];
NSLog(@"error is %@",error);
}
// This method is used to process the data after connection has made successfully.
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
}
我看到之前的警报视图显示在didRecieveData方法发生内存泄漏。
这里是表示内存泄漏内存泄漏仪器的屏幕截图：
我无法理解其部分代码导致内存泄漏。任何人都可以告诉我如何识别导致泄漏仪器泄漏内存的代码部分？
编辑：当运行在模拟器上的应用程序，该仪器没有显示任何内存泄漏：
这里是截图： 
再次当我在设备运行应用程序，该仪器向我展示了内存泄漏： 
我看着泄漏部分，我发现NSmutableArray是造成泄漏： 
我在我的代码中只使用了一个NSMutableArray。我宣布它在.h文件：
@property (nonatomic,strong) NSMutableArray *reportArray;
和viewDidLoad分配它：
reportArray=[[NSMutableArray alloc]init];
和didRecieveData装好了：
[reportArray addObject:obj[@"reason"]];
堆栈跟踪快照：
请注意，右侧“快照”之上的一个工具按钮选择一个堆栈跟踪，可以显示泄漏对象的分配情况。 –
添加了堆栈跟踪快照！ –