ios - 发送给不可变对象(immutable对象)的变异方法”

我试图从字典添加对象到数组。在其他部分，我得到这个错误

发送给不可变对象的变异方法”

NSMutableDictionary *selectedDict = [NSMutableDictionary new];
    [selectedDict setObject:editedLineItem forKey:@"Text"];
    [selectedDict setObject:@"fa-check" forKey:@"IconClass"];
    NSMutableArray *tagListDictionary = [NSMutableArray new];
    [tagListDictionary addObject:selectedTagsArray];
    LineItemsStorage *linestorage = [LineItemsStorage sharedManager];
    if(![linestorage.packagesArray valueForKey:@"Id"])
    {
        [linestorage.selectedLineItemsAndTagsArray addObject:selectedDict];
    }
    else{        [[linestorage.packagesArray valueForKey:@"LineItems"]addObject:[NSMutableArray arrayWithObject:selectedDict]];
    }

-[ NSCFArray insertObject:atIndex:]:发送给不可变对象的变异方法'
***首先抛出调用堆栈:
(
0 CoreFoundation 0x00000001154a1d85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000114f15deb objc_exception_throw + 48
2 CoreFoundation 0x00000001154a1cbd + [NSException提高:格式:] + 205
3 CoreFoundation 0x0000000115497b0a-[__ NSCFArray insertObject:atIndex:] + 106
4 FlatPebble 0x000000010f276014-[LineItemViewController okayAction] + 836
5 UIKit 0x0000000113809a8d-[UIApplication sendAction:to:from:forEvent:] + 92
6 UIKit 0x000000011397ce67-[UIControl sendAction:to:forEvent:] + 67
7 UIKit 0x000000011397d143-[UIControl _sendActionsForEvents:withEvent:] + 327
8 UIKit 0x000000011397c263-[UIControl touchesEnded:withEvent:] + 601
9 UIKit 0x000000011387c99f-[UIWindow _sendTouchesForEvent:] + 835
10 UIKit 0x000000011387d6d4-[UIWindow sendEvent:] + 865
11 UIKit 0x0000000113828dc6-[UIApplication sendEvent:] + 263
12 UIKit 0x0000000113802553 _UIApplicationHandleEventQueue + 6660
13 CoreFoundation 0x00000001153c7301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
14 CoreFoundation 0x00000001153bd22c __CFRunLoopDoSources0 + 556
15 CoreFoundation 0x00000001153bc6e3 __CFRunLoopRun + 867
16 CoreFoundation 0x00000001153bc0f8 CFRunLoopRunSpecific + 488
17 GraphicsServices 0x0000000116e5cad2 GSEventRunModal + 161
18 UIKit 0x0000000113807f09 UIApplicationMain + 171
19 *********** 0x000000010f348c2f主+ 111
20 libdyld.dylib 0x0000000115d9992d开始+ 1
)

最佳答案

使用此代码

 NSMutableDictionary *selectedDict = [[NSMutableDictionary new]mutableCopy];
    [selectedDict setObject:editedLineItem forKey:@"Text"];
    [selectedDict setObject:@"fa-check" forKey:@"IconClass"];
    NSMutableArray *tagListDictionary = [[NSMutableArray new]mutableCopy];
    [tagListDictionary addObject:selectedTagsArray];
    LineItemsStorage *linestorage = [LineItemsStorage sharedManager];
    if(![linestorage.packagesArray valueForKey:@"Id"])
    {
        [linestorage.selectedLineItemsAndTagsArray addObject:selectedDict];
    }
    else{        [[linestorage.packagesArray valueForKey:@"LineItems"]addObject:[NSMutableArray arrayWithObject:selectedDict]];
    }

关于ios - 发送给不可变对象(immutable对象)的变异方法”，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38369957/