Ios 启用ARC的AF2后异步内存泄漏
我对iOS编码相当陌生。我从以前的程序员那里继承了一段代码,他有一个好主意,就是把代码分成几段。我希望我能让大家理解这一点 邮政服务的一部分Ios 启用ARC的AF2后异步内存泄漏,ios,objective-c,memory-leaks,automatic-ref-counting,afnetworking-2,Ios,Objective C,Memory Leaks,Automatic Ref Counting,Afnetworking 2,我对iOS编码相当陌生。我从以前的程序员那里继承了一段代码,他有一个好主意,就是把代码分成几段。我希望我能让大家理解这一点 邮政服务的一部分 @property(nonatomic)SEL ReturnAction; @property(nonatomic)id ReturnDelegate; 在postservice.m中调用的方法 -(void)Send:(NSString *)Pmethod Mparams:(NSDictionary *)Mparams Mdelegate:(id)
@property(nonatomic)SEL ReturnAction;
@property(nonatomic)id ReturnDelegate;
在postservice.m中调用的方法
-(void)Send:(NSString *)Pmethod Mparams:(NSDictionary *)Mparams Mdelegate:(id)Mdelegate IsSycn:(BOOL)IsSycn ExternalUrl:(BOOL)ExternalUrl{
Murl=[Murl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:Murl]];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
[manager POST:Murl parameters:Mparams success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
//NSLog(@"success %@", string);
if ([ReturnDelegate respondsToSelector:ReturnAction]) {
((void (*)(id, SEL, id))[ReturnDelegate methodForSelector:ReturnAction])(ReturnDelegate, ReturnAction, string);
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
//NSLog(@"error %@", error);
if ([ReturnDelegate respondsToSelector:ReturnAction]) {
((void (*)(id, SEL, id))[ReturnDelegate methodForSelector:ReturnAction])(ReturnDelegate, ReturnAction, error);
}
}];
}
然后从另一个中级类方法调用
SEU中期邮政服务的一部分
@property(nonatomic)SEL FetchCompleted;
@property(nonatomic)SEL FetchFailed;
@property(nonatomic)id ReturnDelegate;//unsafe_unretained
@property(nonatomic, retain)PostService * service;
SE_MidPostService.m的示例部分
-(void)GetDeviceStatus:(NSString *)DeviceID RestID:(NSNumber *)ReID
{
NSLog(@"GetDeviceStatus");
NSDictionary * Parameters=[[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:DeviceID,ReID, @"GetStat", nil]
forKeys:[NSArray arrayWithObjects:@"DeviceUniqueId",@"ReID", @"OP",nil]];
[service setReturnAction:@selector(GetDeviceStatusCallBack:)];
[service setReturnDelegate:self];
[service Send:@"GetStat" Mparams:Parameters Mdelegate:nil IsSycn:NO ExternalUrl:NO];
}
-(void)GetDeviceStatusCallBack:(id)value{
NSLog(@"GetDeviceStatusCallBack");
if([value isKindOfClass:[NSError class]]) {
if ([ReturnDelegate respondsToSelector:FetchCompleted]) {
((void (*)(id, SEL, id, id))[ReturnDelegate methodForSelector:FetchCompleted])(ReturnDelegate, FetchCompleted, nil, value);
}
return;
}
if ([ReturnDelegate respondsToSelector:FetchCompleted]) {
((void (*)(id, SEL, id, id))[ReturnDelegate methodForSelector:FetchCompleted])(ReturnDelegate, FetchCompleted, value, nil);
}
}
这些被代码的不同部分调用,简化了代码
SE_MidPostService * service=[[SE_MidPostService alloc] init];
[service setReturnDelegate:self];
[service setFetchCompleted:@selector(DeviceStatusCheck:err:)];
[service GetDeviceStatus:uuid RestID:id;
}
-(void)DeviceStatusCheck:(NSNumber *)Result err:(NSError *)err{
if (err!=nil) {...}
//does what ever is needed
}
工具主要强调返回发生的代码
((void (*)(id, SEL, id, id))[ReturnDelegate methodForSelector:FetchCompleted])(ReturnDelegate, FetchCompleted, value, nil);
我以为ARC会处理这件事,但事实并非如此。
我确实读过一些关于autoreleasepool的书。我是否需要将此添加到成功编码中
@autoreleasepool {
// Code that creates autoreleased objects.
}
我希望这里有足够的信息。抱歉,在iOS中是新手,这没有帮助。当您以这种方式调用方法时:
((void (*)(id, SEL, id, id))[ReturnDelegate methodForSelector:FetchCompleted])(ReturnDelegate, FetchCompleted, nil, value);
ARC没有任何合理插入保留和释放的方法,因此这会导致泄漏或崩溃是可以理解的
我在其他地方读到过这方面的文章,除了切换到块而不是委托,似乎没有一个好的解决方案,这通常更干净、更灵活
只需在一个块中执行您的委托传递,而不是使用选择器 如果其他人想要我解决这个问题的方法,我确实把所有的子类都去掉了 这确实增加了编码方面的额外工作,但不会有任何泄漏 这是我使用的代码。我还观看了wwdc 2013内存管理课程。帮助很大
NSString * Murl;
Murl = [NSString stringWithFormat:@"http://%@/service.aspx",[[GlobalData sharedGlobalData].settings ServerIP]];
Murl=[Murl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:Murl]];
__weak typeof(self) weakmyself = self;
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
[manager POST:Murl parameters:Parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
NSNumber *num = [NSNumber numberWithInteger: [string integerValue]];
@autoreleasepool{
//NSLog(@"success %@", string);
[weakmyself Callbackfunction:num err:nil];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
//NSLog(@"error %@", error);
NSError * err = error;
@autoreleasepool{
[weakmyself Callbackfunction:nil err:err];
}
}];
你能给我一个传递块的示例代码吗?你启动[manager POST:Murl parameters:Mparams success:…的代码将一个块传递给一个方法。我想我应该补充一点,有没有更好的方法可以做到这一点。我是否应该将所有代码移到主代码,并停止使用子类中间类的东西。