Question

我正在尝试这件事，但似乎无法做到正确..我有NSMutableDictionary名为 dataDictionary 的 2 KeyValue 对， Id和MethodName

NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] initWithCapacity:1];
[dataDictionary setValue:@"1.0" forKey:@"Id"];
[dataDictionary setValue:@"myMethod" forKey:@"MethodName"];

虽然我的方法是

-(void)myMethod{ … }

所以我需要做的是获取方法名称[dataDictionary valueForKey:@"MethodName"];并调用该方法......

任何帮助都会很棒..提前感谢

Answer 1

您可以使用NSSelectorFromString或NSStringFromSelector

将其存储为NSString

或类似于NSValue

NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys: 
                       [NSValue valueWithPointer:@selector(foo)], @"foo",
                       nil];

SEL aSel = [[dict objectForKey:@"foo"] pointerValue];

更多信息： Add method selector into a dictionary， Store selector as value in an NSDictionary

Answer 2

NSString *myMethodInStringFormat=[dataDictionary valueForKey:@"MethodName"];

SEL mySelector=NSSelectorFromString(myMethodInStringFormat);


#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"

if (mySelector!=nil) {

        [self performSelector:mySelector];
}


#pragma clang diagnostic pop

Answer 3

在＆＃34; Vijay-Apple-Dev.blogspot.com＆＃34;的答案的帮助下，对它进行了一些修改以解决警告..

NSString *myMethodInStringFormat = [dataDictionary valueForKey:@"MethodName"];

SEL mySelector = NSSelectorFromString(myMethodInStringFormat);

if (mySelector!=nil) {

        [self performSelector:mySelector withObject:nil afterDelay:0.0];
}

iOS将方法名称添加到NSDictionary并在之后调用它

3 个答案: