如何在iOS中解决此警告?内存泄漏
函数中的这一行创建了一个警告:PerformSelector可能会导致内存泄漏,因为它的选择器未知。我做错了什么如何在iOS中解决此警告?内存泄漏,ios,memory,memory-leaks,warnings,Ios,Memory,Memory Leaks,Warnings,函数中的这一行创建了一个警告:PerformSelector可能会导致内存泄漏,因为它的选择器未知。我做错了什么 - (void)connectionDidFinishLoading:(NSURLConnection *)connection { [_delegate1 performSelector:_selector1 withObject:json]; } 下面是performSelector的方法 - (void)HttpRequest:(NSURL*)url PostString
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[_delegate1 performSelector:_selector1 withObject:json];
}
下面是performSelector的方法
- (void)HttpRequest:(NSURL*)url PostString:(NSString *)poststring method:(int)method withselector:(SEL)selector withdelegate:(id)delegate
{
_responseData = [[NSMutableData alloc] init];
// procedures for parse at desired URL
request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
timeoutInterval:5];
// set HTTP method
if (method == 0) {
[request setHTTPMethod:@"GET"];
// asks xml response
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"]; }
_selector1 = selector ;
_delegate1 = delegate ;
[self startConnection];
return;
}
您没有做错什么。编译器导致警告,因为它还不知道选择器。 如果您在某个地方收到此警告,请使用
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[_delegate1 performSelector:_selector1 withObject:json];
#pragma clang diagnostic pop
如果有多个位置,则可以定义宏
#define SuppressPerformSelectorLeakWarning(Stuff) \
do { \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
Stuff; \
_Pragma("clang diagnostic pop") \
} while (0)
然后在出现警告的所有位置使用宏
SuppressPerformSelectorLeakWarning(
[_delegate1 performSelector:_selector1 withObject:json];
);
像这样调用每个选择器,它将取消警告@user3178926欢迎!!