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323 lines (258 loc) · 9.65 KB
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//
// VCAlertViewQueue.m
// VCAlertViewQueue
//
// Created by Victor Charapaev on 3/22/12.
// Copyright 2012 __MyCompanyName__. All rights reserved.
//
static NSString *kAlertViewKey = @"AlertViewKey";
static NSString *kPriorityKey = @"PriorityKey";
#import "VCAlertViewQueue.h"
@interface VCAlertViewQueue()
@property (retain) NSMutableArray *highPriorityAlerts;
@property (retain) NSMutableArray *defaultPriorityAlerts;
@property (retain) UIAlertView *currentAlert;
@property priority_t currentAlertPriority;
//helper functions!
/* Makes passed in alert the current alert */
-(void)makeCurrentAlert:(UIAlertView*)alert withPriority:(priority_t)priority;
/* current alert is removed from view, alert property and priority is cleared */
-(void)clearCurrentAlert;
/* Calls addAlert:withPriority: on main thread.
UIAlertView and priority are passed through dictionary with keys kAlertViewKey, kPriorityKey
*/
-(void)addAlertOnMainThread:(NSDictionary*)arguments;
/*
Function checks for next alert,
*/
-(void)showNextAlert;
@end
@implementation VCAlertViewQueue
#pragma mark getters / setters
@synthesize highPriorityAlerts = _highPriorityAlerts, defaultPriorityAlerts = _defaultPriorityAlerts;
@synthesize currentAlert = _currentAlert, currentAlertPriority = _currentAlertPriority;
@synthesize supressAlerts = _supressAlerts, ignoreAlerts = _ignoreAlerts;
-(void)setSupressAlerts:(BOOL)supress
{
@synchronized(self){
if(supress != _supressAlerts){
_supressAlerts = supress;
if(!supress){
[self showNextAlert];
}
}
}
}
#pragma mark Public Methods
-(id)init
{
self = [super init];
if(self){
_defaultPriorityAlerts = [[NSMutableArray alloc] init];
_highPriorityAlerts = [[NSMutableArray alloc] init];
}
return self;
}
-(void)dealloc
{
[_currentAlert release];
[_defaultPriorityAlerts release];
[_highPriorityAlerts release];
[super dealloc];
}
/* Public Methods*/
-(void)addAlertView:(UIAlertView *)alertView withPriority:(priority_t)priority
{
if(self.ignoreAlerts) return;
//operate on main thread only
if([NSThread currentThread] != [NSThread mainThread]){
[self performSelector:@selector(addAlertOnMainThread:)
onThread:[NSThread mainThread]
withObject:[NSDictionary dictionaryWithObjectsAndKeys:alertView, kAlertViewKey, [NSNumber numberWithInt:priority], kPriorityKey, nil]
waitUntilDone:NO];
return;
}
switch(priority){
case PRIORITY_LOW:
{
//low priority alert show only when there are no other alerts present, and alerts are not supressed
if(!self.currentAlert && !self.supressAlerts){
[self makeCurrentAlert:alertView withPriority:priority];
[self.currentAlert show];
}
break;
}
case PRIORITY_MEDIUM:
{
if(self.supressAlerts) return;
//show MEDIUM alert only if LOW/MEDIUM ALERTS PRESENT
if(self.currentAlertPriority == PRIORITY_LOW || self.currentAlertPriority == PRIORITY_MEDIUM){
[self clearCurrentAlert];
}
if(self.currentAlertPriority == PRIORITY_NULL){
[self makeCurrentAlert:alertView withPriority:priority];
[self.currentAlert show];
}
break;
}
case PRIORITY_DEFAULT:
{
if([self.defaultPriorityAlerts count]){
UIAlertView *previousAlert = [self.defaultPriorityAlerts lastObject];
previousAlert.hidden = YES;
}
[self.defaultPriorityAlerts addObject:alertView];
if(self.supressAlerts) return;
if(self.currentAlert){
if(self.currentAlertPriority == PRIORITY_LOW || self.currentAlertPriority == PRIORITY_MEDIUM){
[self clearCurrentAlert];
}
}
if(self.currentAlertPriority != PRIORITY_HIGH){
[self makeCurrentAlert:alertView withPriority:priority];
[self.currentAlert show];
}
break;
}
case PRIORITY_HIGH:
{
[self.highPriorityAlerts addObject:alertView];
if(self.supressAlerts) return;
if(self.currentAlert){
if(self.currentAlertPriority == PRIORITY_LOW || self.currentAlertPriority == PRIORITY_MEDIUM){
[self clearCurrentAlert];
}
}
if(self.currentAlertPriority != PRIORITY_HIGH){
[self makeCurrentAlert:alertView withPriority:priority];
[self.currentAlert show];
}
}
default:
{
break;
}
}
}
-(void)removeAllAlerts
{
[self clearCurrentAlert];
for(UIAlertView *alert in self.highPriorityAlerts){
[alert removeFromSuperview];
}
[self.highPriorityAlerts removeAllObjects];
for(UIAlertView *alert in self.defaultPriorityAlerts){
[alert removeFromSuperview];
}
[self.defaultPriorityAlerts removeAllObjects];
}
#pragma mark Private Methods
-(void)addAlertOnMainThread:(NSDictionary *)arguments
{
[self addAlertView:[arguments objectForKey:kAlertViewKey] withPriority:[[arguments objectForKey:kPriorityKey] intValue]];
}
-(void)makeCurrentAlert:(UIAlertView *)alert withPriority:(priority_t)priority
{
self.currentAlertPriority = priority;
if(self.currentAlert){
if(self.currentAlert != alert){
self.currentAlert.delegate = _realAlertViewDelegateRef;
}
}
_realAlertViewDelegateRef = alert.delegate;
alert.delegate = self;
self.currentAlert = alert;
}
-(void)clearCurrentAlert
{
if(self.currentAlert){
self.currentAlert.delegate = nil;
[self.currentAlert dismissWithClickedButtonIndex:self.currentAlert.cancelButtonIndex animated:NO];
/*
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertViewCancelledByQueue:)]){
[(id <VCAlertViewQueueDelegate> )_realAlertViewDelegateRef alertViewCancelledByQueue:self.currentAlert];
}
*/
self.currentAlert = nil;
_realAlertViewDelegateRef = nil;
}
self.currentAlertPriority = PRIORITY_NULL;
}
-(void)showNextAlert
{
if([self.highPriorityAlerts count]){
[self makeCurrentAlert:[self.highPriorityAlerts objectAtIndex:0] withPriority:PRIORITY_HIGH];
[self.currentAlert show];
}
else if([self.defaultPriorityAlerts count]){
[self makeCurrentAlert:[self.defaultPriorityAlerts lastObject] withPriority:PRIORITY_DEFAULT];
self.currentAlert.hidden = NO;
if(!self.currentAlert.superview){
[self.currentAlert show];
}
}
}
#pragma mark UIAlertView Delegate callbacks
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
//
if(self.currentAlert == alertView){
if(self.currentAlertPriority == PRIORITY_DEFAULT){
[self.defaultPriorityAlerts removeLastObject];
}
else if(self.currentAlertPriority == PRIORITY_HIGH){
[self.highPriorityAlerts removeObjectAtIndex:0];
}
[self clearCurrentAlert];
if(!self.supressAlerts){
[self showNextAlert];
}
}
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertView:didDismissWithButtonIndex:)]){
[_realAlertViewDelegateRef alertView:alertView didDismissWithButtonIndex:buttonIndex];
}
}
// Called when a button is clicked. The view will be automatically dismissed after this call returns
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertView:clickedButtonAtIndex:)]){
[_realAlertViewDelegateRef alertView:alertView clickedButtonAtIndex:buttonIndex];
}
}
// Called when we cancel a view (eg. the user clicks the Home button). This is not called when the user clicks the cancel button.
// If not defined in the delegate, we simulate a click in the cancel button
/*
- (void)alertViewCancel:(UIAlertView *)alertView
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertViewCancel:)]){
[_realAlertViewDelegateRef alertViewCancel:alertView];
}
}
*/
- (void)willPresentAlertView:(UIAlertView *)alertView
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(willPresentAlertView:)]){
[_realAlertViewDelegateRef willPresentAlertView:alertView];
}
}
- (void)didPresentAlertView:(UIAlertView *)alertView
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(didPresentAlertView:)]){
[_realAlertViewDelegateRef didPresentAlertView:alertView];
}
}
- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertView:willDismissWithButtonIndex:)]){
[_realAlertViewDelegateRef alertView:alertView willDismissWithButtonIndex:buttonIndex];
}
}
// Called after edits in any of the default fields added by the style
- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView
{
if([_realAlertViewDelegateRef respondsToSelector:@selector(alertViewShouldEnableFirstOtherButton:)]){
return [_realAlertViewDelegateRef alertViewShouldEnableFirstOtherButton:alertView];
}
return NO;
}
@end