How can I reload UIAlertView message - ios

Question

I took this project from github.
It is custom AlertView. I understood how it works. Modified it for my project, like this
Course1 - name of some product, and '1' - is its amount. When I'm typing on plus/minus amount increases/decreases. But it works only for my variable (which I load on this AlertView, when I show it, and it is 1). How can I reload message of this alert view with changing var (amount). I can't understand.
Here my code.
In my class I call alert view by this code
BlockAlertView *alert = [BlockAlertView alertWithTitle: title message:ac.acCount];
[alert setCancelButtonWithTitle:#"-" block:nil];
[alert setDestructiveButtonWithTitle:#"+" block:^{
int u = [ac.acCount intValue];
u++;
ac.acCount = [NSString stringWithFormat:#"%d", u];
NSLog(#"%d", u);
}];
[alert addButtonWithTitle:#"Ok" block:^{
NSMutableArray *container = [[NSMutableArray alloc] init];
[container addObject:title];
[container addObject:price];
[container addObject:bId];
[container addObject:ac.acCount];
[container addObject:depid];
[[NSNotificationCenter defaultCenter] postNotificationName:#"MyNotification" object:container];
}];
[alert show];
Show method just draws alert view with params which takes from alertWithTitle: title message:ac.acCount. Here is the code
+ (BlockAlertView *)alertWithTitle:(NSString *)title message:(NSString *)message
{
return [[[BlockAlertView alloc] initWithTitle:title message:message] autorelease];
}
here is
- (id)initWithTitle:(NSString *)title message:(NSString *)message
{
NSLog(#"title - %# message - %#", title, message);
if ((self = [super init]))
{
UIWindow *parentView = [BlockBackground sharedInstance];
CGRect frame = parentView.bounds;
frame.origin.x = floorf((frame.size.width - background.size.width) * 0.5);
frame.size.width = background.size.width;
_view = [[UIView alloc] initWithFrame:frame];
_blocks = [[NSMutableArray alloc] init];
_height = kAlertViewBorder + 6;
if (title)
{
CGSize size = [title sizeWithFont:titleFont
constrainedToSize:CGSizeMake(frame.size.width-kAlertViewBorder*2, 1000)
lineBreakMode:UILineBreakModeWordWrap];
UILabel *labelView = [[UILabel alloc] initWithFrame:CGRectMake(kAlertViewBorder, _height, frame.size.width-kAlertViewBorder*2, size.height)];
labelView.font = titleFont;
labelView.numberOfLines = 0;
labelView.lineBreakMode = UILineBreakModeWordWrap;
labelView.textColor = kAlertViewTitleTextColor;
labelView.backgroundColor = [UIColor clearColor];
labelView.textAlignment = UITextAlignmentCenter;
labelView.shadowColor = kAlertViewTitleShadowColor;
labelView.shadowOffset = kAlertViewTitleShadowOffset;
labelView.text = title;
[_view addSubview:labelView];
[labelView release];
_height += size.height + kAlertViewBorder;
}
if (message)
{
CGSize size = [message sizeWithFont:messageFont
constrainedToSize:CGSizeMake(frame.size.width-kAlertViewBorder*2, 1000)
lineBreakMode:UILineBreakModeWordWrap];
UILabel *labelView = [[UILabel alloc] initWithFrame:CGRectMake(kAlertViewBorder, _height, frame.size.width-kAlertViewBorder*2, size.height)];
labelView.font = messageFont;
labelView.numberOfLines = 0;
labelView.lineBreakMode = UILineBreakModeWordWrap;
labelView.textColor = kAlertViewMessageTextColor;
labelView.backgroundColor = [UIColor clearColor];
labelView.textAlignment = UITextAlignmentCenter;
labelView.shadowColor = kAlertViewMessageShadowColor;
labelView.shadowOffset = kAlertViewMessageShadowOffset;
labelView.text = message;
[_view addSubview:labelView];
[labelView release];
_height += size.height + kAlertViewBorder;
}
_vignetteBackground = NO;
}
return self;
}
I tried to use something like this
-(void)reloadAlertView: (NSString *) title: (NSString *) message{
[self initWithTitle:title message:message];
}
and call this from my class, where i shows alert view.
[alert reloadAlertView: title: newMessage];

Answer 1

YOu need to ref a new label in your CustomAlertView.h
#property (nonatomic, strong) IBOutlet UILabel *mylab;
then you can get the properties of this label by the object of the CustomAlertView.h class
BlockAlertView *alert ...;
alert.mylab.text = #"hello";

Answer 2

solution (simple , not required to hack the BlockAlertView.m)
whenever the + button is click, the alert will be disappeared, and reappeared again.
ViewController.m
#implementation ViewController {
BlockAlertView *alert ;
NSInteger value;
}
-(void) viewDidLoad {
value = 0;
[self reloadAlert];
}
-(void) reloadAlert {
value += 1;
__block ViewController* _self = self;
alert = [[BlockAlertView alloc] initWithTitle:#"Course1" message:[[[NSNumber alloc] initWithInteger:value ] stringValue]];
[alert setDestructiveButtonWithTitle:#"PLUS" block:^{
[_self reloadAlert];
}];
[alert show];
}
}
solution , if you want to keep the AlertView remained, without popping up.
a. Modify BlockAlertView.h to bring messageLabelView outside to be accessed from ViewController, so we can redraw the message later.
BlockAlertView.h
#interface BlockAlertView {
...
}
#property (nonatomic, retain) UILabel *messageLabelView;
You can also bring the UIView *_view out of #protected and into #property instead, if preferred. In that case, messageLabelView can be access via _view 's subviews
b. Modify BlockAlertView.m dismissWithClickedButtonIndex:animated: to disable removeView function from being called if buttonIndex == PLUS sign button - buttonIndex to be hardcoded to 0.
There may be a better option to stop the execution thread inside the block obj of PLUS button, but I dont know how to do :)
c. Modify BlockAlert.m initWithTitle:message: to add reference of messageLabelView into labelView during the render of message Label.
BlockAlertView.m
#synthesize messageLabelView;
- (id)initWithTitle:(NSString *)title message:(NSString *)message
{
...
// code to initialize messageLabelView
if (message)
{
....
// code to render labelView for message. add reference to messageLabelView
messageLabelView = labelView;
// [labelView release];
}
}
- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated
{
if (buttonIndex >= 0 && buttonIndex < [_blocks count])
{
id obj = [[_blocks objectAtIndex: buttonIndex] objectAtIndex:0];
if (![obj isEqual:[NSNull null]])
{
((void (^)())obj)();
}
}
// there may be a better option to stop the execution thread inside the block obj above
if(buttonIndex == 0) {// or whatever index of Plus Button, dont removeView
return;
}
// code to removeView below, keep as usual
if (animated)
{
...
}
else
{
....
}
}
}
d. Change reloadAlert in ViewController.m
ViewController.m
-(void) reloadAlert {
value += 1;
alert.messageLabelView.text = [[[NSNumber alloc] initWithInteger:value ] stringValue];
[alert.messageLabelView setNeedsDisplay];
}