iphone - 检查字典数组中是否存在字典？

Question

我有一个字典数组，其中包含相同的键但不同的值。我有另一本字典，我想检查该字典是否存在于该数组中……？？？

Answer 1

假设您的第二个字典 key1、key2、key3 中有三个键，因此要验证您的数组中是否存在该字典，请像这样使用“NSPredicate”类假设你的数组是 _myDicArray 而其他字典是 _refDic

NSPredicate* myPredicate =[NSPredicate predicateWithFormat:@"key1 like %@ AND key2 like %@ AND key3 like %@",[_refDic objectForKey:@"key1"],[_refDic objectForKey:@"key2"],[_refDic objectForKey:@"key3"]];
NSArray* someOtherArr = [[_myDicArray filteredArrayUsingPredicate:filmPredicate] objectAtIndex:0];
if([someOtherArr count] > 0)
    //this is what you wanted ... this array has ur dic

我觉得这也行

 NSPredicate* myPredicate =[NSPredicate predicateWithFormat:@"self == %@",_refDic];
NSArray* someOtherArr = [[_myDicArray filteredArrayUsingPredicate:filmPredicate] objectAtIndex:0];
if([someOtherArr count] > 0)
    //this is what you wanted ... this array has ur dic