CkoJsonArray Objective-C Reference Documentation

CkoJsonArray

Current Version: 9.5.0.75

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, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes 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 information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
@property (nonatomic) BOOL LastMethodSuccess;
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of YES indicates success, a value of NO indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = YES and failure = NO.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to YES. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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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 "9.5.0.63"

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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.

More Information and Examples
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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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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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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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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.

More Information and Examples
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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).

More Information and Examples
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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).

More Information and Examples
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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.

More Information and Examples
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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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SaveLastError
- (BOOL)SaveLastError:(NSString *)path;

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns YES for success, NO for 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.

More Information and Examples
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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.

More Information and Examples
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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.

More Information and Examples
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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.

More Information and Examples
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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

More Information and Examples
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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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