Objective-C

JSON: Access Array Values

See more JSON Examples

Demonstrates how to access values in a JSON array. Objective-C

#import <CkoJsonObject.h>
#import <NSString.h>
#import <CkoJsonArray.h>

BOOL success = NO;

CkoJsonObject *json = [[CkoJsonObject alloc] init];

NSString *jsonStr = @"{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", 22, \"green\"], \"price\": 125 }";

success = [json Load: jsonStr];
if (success != YES) {
    NSLog(@"%@",json.LastErrorText);
    return;
}

// Get the "tags" array, which contains "home", 22, "green"
CkoJsonArray *tagsArray = [json ArrayOf: @"tags"];
if (json.LastMethodSuccess == NO) {
    NSLog(@"%@",@"tags member not found.");
    return;
}

// Get the value at each array index. 
// Output will be:
// [0] = home
// [0] as integer = 0
// [1] = 22
// [1] as integer = 22
// [2] = green
// [2] as integer = 0

int arraySize = [tagsArray.Size intValue];
int i;
for (i = 0; i <= arraySize - 1; i++) {

    NSString *sValue = [tagsArray StringAt: [NSNumber numberWithInt: i]];

    NSLog(@"%@%d%@%@",@"[",i,@"] = ",sValue);

    int iValue = [[tagsArray IntAt: [NSNumber numberWithInt: i]] intValue];
    NSLog(@"%@%d%@%d",@"[",i,@"] as integer = ",iValue);

}

// Note: The StringAt method returns the value as a string regardless of the type.

// The IntAt method returns the value as an integer.  If the value does not convert to 
// an integer, then 0 is returned