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我是一名遵循 iOS 编程的新程序员：The Big Nerd Ranch Guide Chapter 2 - Gold Challenge。

我有一堂课BNRItem。和 的一个子BNRItem类BNRContainer。

我的BNRContainer包含 11 个项目。前十项是BNRItems。第 11 项是另一个BNRContainer也包含 10 项的项目。

在 main.m 中：

NSLog(@"%@", container);

在 BNRContainer.m 中：

- (NSString *)description
{
    NSString *descriptionString = [[NSString alloc] initWithFormat:@"%@: Total Value = $%d: %@", [self containerName], [self valueInDollars], subItems];
    return descriptionString;
}

subItems 是指向 NSMutableArray 的指针，它包含我要打印的所有 BNRItems：

@interface BNRContainer : BNRItem
{
    NSString *containerName;
    NSMutableArray *subItems;
}

打印出来的内容：

My Container contains 11 items
My Container: Total Value = $1096: (
    "Undead Goblin (8Q2U8): Worth $73, recorded on 2013-04-21 13:17:54 +0800",
    "Flaming Troll (5Y2V3): Worth $40, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Human (2F9Z7): Worth $40, recorded on 2013-04-21 13:17:54 +0800",
    "Flying Elf (8G5V6): Worth $99, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Orc (3P9B1): Worth $10, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Goblin (6R5C1): Worth $93, recorded on 2013-04-21 13:17:54 +0800",
    "Stone Giant (3E4O0): Worth $1, recorded on 2013-04-21 13:17:54 +0800",
    "Stone Goblin (3A6T4): Worth $30, recorded on 2013-04-21 13:17:54 +0800",
    "Shiny Troll (8S3I1): Worth $77, recorded on 2013-04-21 13:17:54 +0800",
    "Flying Orc (4F6F9): Worth $65, recorded on 2013-04-21 13:17:54 +0800",
    "Dublicate Container: Total Value = $568: (\n    \"Flying Elf (1P5F4): Worth $29, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Shiny Elf (3R2Q6): Worth $88, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Shiny Dwarf (4X7P8): Worth $38, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Undead Goblin (7E4L1): Worth $77, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Flying Human (8K9Y2): Worth $35, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Flying Human (8J8T0): Worth $94, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Shiny Dwarf (5E2Z1): Worth $42, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Flying Troll (1K1G7): Worth $71, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Shiny Troll (9X6C8): Worth $40, recorded on 2013-04-21 13:17:58 +0800\",\n    \"Flying Elf (3H0R6): Worth $54, recorded on 2013-04-21 13:17:58 +0800\"\n)"

)

我如何让它像这样打印出 \n ？

My Container contains 11 items
My Container: Total Value = $1096: (
    "Undead Goblin (8Q2U8): Worth $73, recorded on 2013-04-21 13:17:54 +0800",
    "Flaming Troll (5Y2V3): Worth $40, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Human (2F9Z7): Worth $40, recorded on 2013-04-21 13:17:54 +0800",
    "Flying Elf (8G5V6): Worth $99, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Orc (3P9B1): Worth $10, recorded on 2013-04-21 13:17:54 +0800",
    "Undead Goblin (6R5C1): Worth $93, recorded on 2013-04-21 13:17:54 +0800",
    "Stone Giant (3E4O0): Worth $1, recorded on 2013-04-21 13:17:54 +0800",
    "Stone Goblin (3A6T4): Worth $30, recorded on 2013-04-21 13:17:54 +0800",
    "Shiny Troll (8S3I1): Worth $77, recorded on 2013-04-21 13:17:54 +0800",
    "Flying Orc (4F6F9): Worth $65, recorded on 2013-04-21 13:17:54 +0800",
    "Dublicate Container: Total Value = $568: (
        "Flying Elf (1P5F4): Worth $29, recorded on 2013-04-21 13:17:58 +0800\",
        "Shiny Elf (3R2Q6): Worth $88, recorded on 2013-04-21 13:17:58 +0800\",
        "Shiny Dwarf (4X7P8): Worth $38, recorded on 2013-04-21 13:17:58 +0800\",
        "Undead Goblin (7E4L1): Worth $77, recorded on 2013-04-21 13:17:58 +0800\",
        "Flying Human (8K9Y2): Worth $35, recorded on 2013-04-21 13:17:58 +0800\",
        "Flying Human (8J8T0): Worth $94, recorded on 2013-04-21 13:17:58 +0800\",
        "Shiny Dwarf (5E2Z1): Worth $42, recorded on 2013-04-21 13:17:58 +0800\",
        "Flying Troll (1K1G7): Worth $71, recorded on 2013-04-21 13:17:58 +0800\",
        "Shiny Troll (9X6C8): Worth $40, recorded on 2013-04-21 13:17:58 +0800\",
        "Flying Elf (3H0R6): Worth $54, recorded on 2013-04-21 13:17:58 +0800\"
    )"
)

感谢所有帮助！谢谢！

4

1 回答 1

1

打印日志时，可以在打印的内容中添加 \n\r。例如

NSLog(@"This is the first Line \n\r This is the Second Line");

将打印：

这是第一行 这是第二行

因此，请尝试使用此功能随时换行。

于 2013-04-21T07:13:57.413 回答