iphone - 如何将 NSArray 输出连接到以逗号分隔的 NSString

Question

我正在使用以下代码尝试将数组输出连接到 NSString。

NSArray  *array1 = [NSArray arrayWithObjects:[item objectForKey:@"id"], nil];
NSString *joinedString = [array1 componentsJoinedByString:@","];

NSLog(@"joinedString is %@", joinedString);

我希望将连接后的字符串输出为:连接后的字符串为 55,56,57,66,88...等等...目前输出为:

2013-03-05 13:13:17.052  [63705:907] joinedString is 55
2013-03-05 13:13:17.056  [63705:907] joinedString is 56
2013-03-05 13:13:17.060  [63705:907] joinedString is 57
2013-03-05 13:13:17.064  [63705:907] joinedString is 66

Answer 1

您可能在循环中运行 join 方法。

我想这就是你想要的。

NSMutableArray * array1 = [NSMutableArray array]; // create a Mutable array

for(id item in items){
      [array1 addObject:[item objectForKey:@"id"]]; // Add the values to this created mutable array
}

NSString *joinedString = [array1 componentsJoinedByString:@","];

NSLog(@"joinedString is %@", joinedString);