CODEWITHSUNDEEP
objective-ccocoaapplescript
Ranjith Kumar G
Ranjith Kumar G

Reputation: 91

Unable to parse the result returned by NSAppleScript method executeAndReturnError

This is the code which i am using:

NSDictionary *errorInfo=nil;
NSString *source=@"tell application \"Mail\"\nget name of mailbox of every account\nend tell";
NSAppleScript *run = [[NSAppleScript alloc] initWithSource:source];
NSAppleEventDescriptor *aDescriptor=[[NSAppleEventDescriptor alloc]init];
aDescriptor=[run executeAndReturnError:&errorInfo];
[aDescriptor coerceToDescriptorType:'utxt'];
NSLog(@"result:%@",[aDescriptor stringValue]);

Output which i got: result:(null)

Please help me anyone on this.Thanks in advance:)

Upvotes: 3

Views: 1823

Answers (2)

ixany
ixany

Reputation: 6040

Swift version, tested in 2022:

func run(appleScript: String) {
    var error: NSDictionary? = nil
    if let scriptObject = NSAppleScript(source: appleScript) {
            
        let output = scriptObject.executeAndReturnError(&error)
            
        // Print All Values
        let numberOfItems = output.numberOfItems
        print("numberOfItems: \(numberOfItems)")
            
        for i in 0..<numberOfItems {
            let innerDescriptor = output.atIndex(i)
            print("\(i): " + (innerDescriptor?.stringValue ?? "nil"))
        }
            
        // Catch Error
        if let error = error {
            print("Error: '\(error)'")
        }
            
    } else {
        print("Error: Unable to init NSAppleScript")
    }
}

Upvotes: 0

Wevah
Wevah

Reputation: 28242

IIRC that will return a list descriptor filled with list descriptors. You need to iterate over them and pull out the info you want. You're also initializing a descriptor and then immediately overwriting its pointer. Do something like (untested):

NSDictionary *errorInfo = nil;
NSString *source = @"tell application \"Mail\"\nget name of mailbox of every account\nend tell";
NSAppleScript *run = [[NSAppleScript alloc] initWithSource:source];
NSAppleEventDescriptor *aDescriptor = [run executeAndReturnError:&errorInfo];
NSInteger num = [aDescriptor numberOfItems];

// Apple event descriptor list indexes are one-based!
for (NSInteger idx = 1; idx <= num; ++idx) {
    NSAppleEventDescriptor *innerListDescriptor = [aDescriptor descriptorAtIndex:idx];

    NSInteger innerNum = [innerListDescriptor numberOfItems];

    for (NSInteger innerIdx = 1; innerIdx <= innerNum; ++innerIdx) {
        NSString *str = [[innerListDescriptor descriptorAtIndex:innerIdx] stringValue];
        // Do something with str here
    }
}

Upvotes: 3

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