ios - 如何添加objectAtIndex :i of NSArray to NSMutableDictionary

Question

如何添加 objectAtIndex:i的 NSArray至NSMutableDictionary
我试过了

for(int i=0 ;i<=[user count]; i++){

NSMutableDictionary * dict = [NSMutableDictionary :[user objectAtIndex:i]];

}

Answer 1

 NSMutableDictionary *dic = [[NSMutableDictionary alloc] initWithCapacity:[user count]];

 for(int i=0 ;i<[user count]; i++) {
    [dic setObject:[user objectAtIndex:i] forKey:[NSString stringWithFormat:@"%i", i]];
 }

小心这个:i<[user count]，就像你现在做的那样，你会得到一条数组索引超出范围的消息。当然，您可以根据需要为每个元素设置键。