JsonArray Objective-C Reference Documentation

CkoJsonArray

Current Version: 10.1.2

Represents a JSON array, which contains an ordered list of JSON values, where each value can be a string, number, JSON object, JSON array, true, false, or null.

Object Creation

CkoJsonArray *obj = [[CkoJsonArray alloc] init];

Properties

DebugLogFilePath
@property (nonatomic, copy) NSString *DebugLogFilePath;

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

  • A timeout property set to 0, indicating an infinite timeout.
  • A hang occurring within an event callback in the application code.
  • An internal bug in the Chilkat code causing the hang.

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EmitCompact
@property (nonatomic) BOOL EmitCompact;
Introduced in version 9.5.0.64

If YES then the Emit method outputs in the most compact form possible (a single-line with no extra whitespace). If NO, then emits with whitespace and indentation to make the JSON human-readable.

The default value is YES.

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EmitCrlf
@property (nonatomic) BOOL EmitCrlf;
Introduced in version 9.5.0.64

If YES then the Emit method uses CRLF line-endings when emitting the non-compact (pretty-print) format. If NO, then bare-LF's are emitted. (The compact format emits to a single line with no end-of-line characters.) Windows systems traditionally use CRLF line-endings, whereas Linux, Mac OS X, and other systems traditionally use bare-LF line-endings.

The default value is YES.

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LastErrorHtml
@property (nonatomic, readonly, copy) NSString *LastErrorHtml;

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorText
@property (nonatomic, readonly, copy) NSString *LastErrorText;

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorXml
@property (nonatomic, readonly, copy) NSString *LastErrorXml;

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastMethodSuccess
@property (nonatomic) BOOL LastMethodSuccess;

Indicates the success or failure of the most recent method call: YES means success, NO means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.

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Size
@property (nonatomic, readonly, copy) NSNumber *Size;
Introduced in version 9.5.0.56

The number of JSON values in the array.

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VerboseLogging
@property (nonatomic) BOOL VerboseLogging;

If set to YES, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is NO. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
@property (nonatomic, readonly, copy) NSString *Version;

Version of the component/library, such as "10.1.0"

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Methods

AddArrayAt
- (BOOL)AddArrayAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Inserts a new and empty JSON array member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddBoolAt
- (BOOL)AddBoolAt:(NSNumber *)index
    value:(BOOL)value;
Introduced in version 9.5.0.56

Inserts a new boolean member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddIntAt
- (BOOL)AddIntAt:(NSNumber *)index
    value:(NSNumber *)value;
Introduced in version 9.5.0.56

Inserts a new integer member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddNullAt
- (BOOL)AddNullAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Inserts a new null member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddNumberAt
- (BOOL)AddNumberAt:(NSNumber *)index
    numericStr:(NSString *)numericStr;
Introduced in version 9.5.0.56

Inserts a new numeric member to the position indicated by index. The numericStr is an integer, float, or double already converted to a string in the format desired by the application. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddObjectAt
- (BOOL)AddObjectAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Inserts a new and empty JSON object member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddObjectCopyAt
- (BOOL)AddObjectCopyAt:(NSNumber *)index
    jsonObj:(CkoJsonObject *)jsonObj;
Introduced in version 9.5.0.82

Inserts a copy of a JSON object to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddStringAt
- (BOOL)AddStringAt:(NSNumber *)index
    value:(NSString *)value;
Introduced in version 9.5.0.56

Inserts a new string at the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AddUIntAt
- (BOOL)AddUIntAt:(NSNumber *)index
    value:(NSNumber *)value;
Introduced in version 9.5.0.96

Inserts a new unsigned integer member to the position indicated by index. To prepend, pass an index of 0. To append, pass an index of -1. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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AppendArrayItems
- (BOOL)AppendArrayItems:(CkoJsonArray *)jarr;
Introduced in version 9.5.0.82

Appends the array items contained in jarr.

Returns YES for success, NO for failure.

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ArrayAt
- (CkoJsonArray *)ArrayAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the JSON array that is the value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns nil on failure

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BoolAt
- (BOOL)BoolAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the boolean value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

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Clear
- (void)Clear;
Introduced in version 9.5.0.76

Deletes all array elements.

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DateAt
- (BOOL)DateAt:(NSNumber *)index
    dateTime:(CkoDateTime *)dateTime;
Introduced in version 9.5.0.73

Fills the dateTime with the date/time string located in the Nth array element. Indexing is 0-based (the 1st member is at index 0). Auto-recognizes the following date/time string formats: ISO-8061 Timestamp (such as "2009-11-04T19:55:41Z"), RFC822 date/time format (such as "Wed, 18 Apr 2018 15:51:55 -0400"), or Unix timestamp integers.

Returns YES for success, NO for failure.

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DeleteAt
- (BOOL)DeleteAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Deletes the array element at the given index. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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DtAt
- (BOOL)DtAt:(NSNumber *)index
    bLocal:(BOOL)bLocal
    dt:(CkoDtObj *)dt;
Introduced in version 9.5.0.73

Fills the dt with the date/time string located in the Nth array element. If bLocal is YES, then dt is filled with the local date/time values, otherwise it is filled with the UTC/GMT values. Indexing is 0-based (the 1st member is at index 0). Auto-recognizes the following date/time string formats: ISO-8061 Timestamp (such as "2009-11-04T19:55:41Z"), RFC822 date/time format (such as "Wed, 18 Apr 2018 15:51:55 -0400"), or Unix timestamp integers.

Returns YES for success, NO for failure.

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Emit
- (NSString *)Emit;
Introduced in version 9.5.0.58

Writes the JSON array (rooted at the caller) and returns as a string.

Note: To control the compact/non-compact format, and to control the LF/CRLF line-endings, set the EmitCompact and EmitCrlf properties.

Returns nil on failure

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EmitSb
- (BOOL)EmitSb:(CkoStringBuilder *)sb;
Introduced in version 9.5.0.65

Writes the JSON array to the sb.

Note: To control the compact/non-compact format, and to control the LF/CRLF line-endings, set the EmitCompact and EmitCrlf properties.

Returns YES for success, NO for failure.

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FindObject
- (NSNumber *)FindObject:(NSString *)name
    value:(NSString *)value
    caseSensitive:(BOOL)caseSensitive;
Introduced in version 9.5.0.73

Return the index of the first object in the array where value of the field at name matches value. name is an object member name. The value is a value pattern which can use "*" chars to indicate zero or more of any char. If caseSensitive is NO, then the matching is case insenstive, otherwise it is case sensitive. Returns -1 if no matching string was found.

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FindString
- (NSNumber *)FindString:(NSString *)value
    caseSensitive:(BOOL)caseSensitive;
Introduced in version 9.5.0.73

Return the index of the first matching string in the array. The value is a value pattern which can use "*" chars to indicate zero or more of any char. If caseSensitive is NO, then the matching is case insenstive, otherwise it is case sensitive. Returns -1 if no matching string was found.

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IntAt
- (NSNumber *)IntAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the integer value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

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IsNullAt
- (BOOL)IsNullAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the YES if the Nth array element is null, otherwise returns NO. Indexing is 0-based (the 1st member is at index 0).

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Load
- (BOOL)Load:(NSString *)jsonArray;
Introduced in version 9.5.0.64

Loads a JSON array from a string. A JSON array must begin with a "[" and end with a "]".

Note: The Load method causes the JsonArray to detach and become it's own JSON document. It should only be called on new instances of the JsonArray. See the example below.

Returns YES for success, NO for failure.

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LoadSb
- (BOOL)LoadSb:(CkoStringBuilder *)sb;
Introduced in version 9.5.0.64

Loads a JSON array from a StringBuilder. A JSON array must begin with a "[" and end with a "]".

Note: The Load method causes the JsonArray to detach and become it's own JSON document. It should only be called on new instances of the JsonArray. See the example below.

Returns YES for success, NO for failure.

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ObjectAt
- (CkoJsonObject *)ObjectAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the JSON object that is the value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns nil on failure

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SetBoolAt
- (BOOL)SetBoolAt:(NSNumber *)index
    value:(BOOL)value;
Introduced in version 9.5.0.56

Sets the boolean value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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SetIntAt
- (BOOL)SetIntAt:(NSNumber *)index
    value:(NSNumber *)value;
Introduced in version 9.5.0.56

Sets the integer value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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SetNullAt
- (BOOL)SetNullAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Sets the Nth array element to the value of null. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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SetNumberAt
- (BOOL)SetNumberAt:(NSNumber *)index
    value:(NSString *)value;
Introduced in version 9.5.0.56

Sets the numeric value of the Nth array element. The value is an integer, float, or double already converted to a string in the format desired by the application. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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SetStringAt
- (BOOL)SetStringAt:(NSNumber *)index
    value:(NSString *)value;
Introduced in version 9.5.0.56

Sets the string value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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SetUIntAt
- (BOOL)SetUIntAt:(NSNumber *)index
    value:(NSNumber *)value;
Introduced in version 9.5.0.96

Sets the unsigned integer value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns YES for success, NO for failure.

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StringAt
- (NSString *)StringAt:(NSNumber *)index;
Introduced in version 9.5.0.56

Returns the string value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

Returns nil on failure

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Swap
- (BOOL)Swap:(NSNumber *)index1
    index2:(NSNumber *)index2;
Introduced in version 9.5.0.76

Swaps the items at positions index1 and index2.

Returns YES for success, NO for failure.

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TypeAt
- (NSNumber *)TypeAt:(NSNumber *)index;
Introduced in version 9.5.0.58

Returns the type of data at the given index. Possible return values are:

  1. string
  2. number
  3. object
  4. array
  5. boolean
  6. null
Returns -1 if no member exists at the given index.

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UIntAt
- (NSNumber *)UIntAt:(NSNumber *)index;
Introduced in version 9.5.0.96

Returns the unsigned integer value of the Nth array element. Indexing is 0-based (the 1st member is at index 0).

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