A simple blocks based recovery object that you can use to take an error and add a recovery method. Recovery methods are blocks passed in
LHErrorRecovery *recovery=[LHErrorRecovery new];
__block BOOL cont=FALSE;
[recovery addRecoveryButton:@"Stop Syncing" action:^{
}];
[recovery addRecoveryButton:@"Continue Syncing" action:^{
cont=TRUE;
}];
[[NSApplication sharedApplication] presentError:[recovery errorForError:aError]];
if (!cont)
cancelSync=TRUE;
[recovery release]
| // | |
| // LHErrorRecovery.h | |
| // FlickrPlusIphotoCoreData | |
| // | |
| // Created by John McLaughlin on 9/29/10. | |
| // Copyright 2010 Loghound.com. All rights reserved. | |
| // | |
| #import <Cocoa/Cocoa.h> | |
| typedef void (^mblk)(); | |
| @interface LHErrorRecovery : NSObject { | |
| NSMutableArray *_errorButtonTitles; | |
| NSMutableArray *_errorBlocks; | |
| } | |
| - (BOOL)attemptRecoveryFromError:(NSError *)error optionIndex:(NSUInteger)recoveryOptionIndex; | |
| -(NSError*) errorForError:(NSError*)aError; | |
| -(void) addRecoveryButton:(NSString*)buttonTitle action:(mblk)action; | |
| // private methods | |
| @property (retain) NSMutableArray *_errorButtonTitles; | |
| @property (retain) NSMutableArray *_errorBlocks; | |
| @end |
| // | |
| // LHErrorRecovery.m | |
| // FlickrPlusIphotoCoreData | |
| // | |
| // Created by John McLaughlin on 9/29/10. | |
| // Copyright 2010 Loghound.com. All rights reserved. | |
| // | |
| #import "LHErrorRecovery.h" | |
| @implementation LHErrorRecovery | |
| @synthesize _errorButtonTitles; | |
| @synthesize _errorBlocks; | |
| - (BOOL)attemptRecoveryFromError:(NSError *)error optionIndex:(NSUInteger)recoveryOptionIndex { | |
| if (recoveryOptionIndex < [self._errorBlocks count]) { | |
| mblk a=[self._errorBlocks objectAtIndex:recoveryOptionIndex]; | |
| a(); | |
| } | |
| return YES; | |
| } | |
| -(void) addRecoveryButton:(NSString*)buttonTitle action:(void(^)())action { | |
| if (!self._errorBlocks) { | |
| self._errorBlocks=[NSMutableArray array]; | |
| self._errorButtonTitles=[NSMutableArray array]; | |
| } | |
| [self._errorButtonTitles addObject:buttonTitle]; | |
| [self._errorBlocks addObject:[action copy]]; | |
| } | |
| -(NSError*) errorForError:(NSError*)aError { | |
| NSMutableDictionary *errorInfo=[[aError userInfo]mutableCopy]; | |
| [errorInfo setObject:self forKey:NSRecoveryAttempterErrorKey]; | |
| [errorInfo setObject:self._errorButtonTitles forKey:NSLocalizedRecoveryOptionsErrorKey]; | |
| NSError *ret=[NSError errorWithDomain:[aError domain] | |
| code:[aError code] | |
| userInfo:errorInfo]; | |
| return ret; | |
| } | |
| -(void) dealloc { | |
| self._errorButtonTitles=nil; | |
| self._errorBlocks =nil; | |
| [super dealloc] | |
| } | |
| @end |