我想在陣列

-5

Opening :- (
"Not Available", 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
"Not Available", 
    { 
    "open_now" = 1; 
    "weekday_text" =   (
    ); 
}, 
"Not Available"

）我想在陣列

關鍵open_now值這是我的NSArray的輸出。它包含一些字符串爲Not Available，它包含一些以{「open_now」= 1開頭的NSDictionary; 「weekday_text」=（）; }。我想只有open_now的值。我不知道如何在新的NSArray中獲得open_now的價值。請任何人幫助我。

來源

2017-05-30 Manesh Pillay

重新格式化帖子，在文本前插入8個空格以進行縮進。 – SPlatten

是的，使用NSArray -valueForKey：方法。

NSArray *extracted = [sourceArray valueForKey:@"a key"];

來源

2017-05-30 09:48:25

我已經嘗試過#Subrat Padhi同樣不起作用 –

請讓我們知道你的代碼示例，可以幫助我理解問題的出處。 –

您可以使用valueForKeyPath的NSArray的方法來獲得特定的鍵的值。

NSArray *aryValue = [YOUR_ARRAY valueForKeyPath:@"open_now"];

來源

2017-05-30 10:42:45 Nirmalsinh

它不工作。在我的數組中有一些字符串和一些NSDictionary隨機存儲。所以我只想要關鍵「open_now」的價值。它給出的例外： - 由於未捕獲的異常'NSUnknownKeyException'，原因：'[<__ NSCFConstantString 0x10ba54d20> valueForUndefinedKey：]：該類不是符合密鑰open_now密鑰的密鑰值。 –

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