UIAlertView
subclass with a simpler API using blocks and target/action invocations.
You can either copy the files into your project or you can use CocoaPods with the following in your Podfie:
pod 'MEAlertView', '~> 1.0.0'
Below are two examples of an alert view with two buttons: "Cancel" and "Ok". The first example is how you would normally use UIAlertView
. The second is the equivalent, but using MEAlertView
.
Using UIAlertView
and a delegate:
- (void)showAlert {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert!" message:@"This is a message" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Ok", nil];
[alertView show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
NSString *clickedButtonTitle = [alertView buttonTitleAtIndex:buttonIndex];
if ([clickedButtonTitle isEqualToString:@"Ok"]) {
// do something when "Ok" is selected
}
}
Converted to use MEAlertView
:
- (void)showAlert {
MEAlertView *alertView = [[MEAlertView alloc] initWithTitle:@"Alert!" message:@"This is a message"];
[alertView setCancelButtonTitle:@"Cancel"];
// Example with block. addOtherButtonWithTitle:target:action:withObject: and its variants are also available.
[alertView addOtherButtonWithTitle:@"Ok" onTapped:^{
// do something when "Ok" is selected
}];
[alertView show];
}
- Drop-in replacement for
UIAlertView
.MEAlertView
is a subclass ofUIAlertView
and the original API works as expected. TheUIAlertViewDelegate
works as well. - Eliminates the long if...else if... or switch statement found in the delegate method
alertView:clickedButtonAtIndex:
. No more trying to match strings or figuring out which index of the button that was tapped. - Results in smaller and re-usable methods using target/action.
- Simplifies the use of multiple alert views per view controller. There is no need for the alert view delegate method that tries to handle all the alert views in one view controller.
- Simplifies passing objects to button actions. You used to have to store a local instance in the view controller and access it in the delegate method. Now, you can just use the object in a block or pass it in with
addButtonWithTitle:target:action:withObject
.
- Order matters. The buttons added first will appear left to right with two buttons, then top to bottom with two or more.
- The cancel button simply means it will be tapped by the system if the
alertViewCancel:
delegate is not implemented. It does not have a special style or position. - Follow Apple's HIG when deciding how to order your buttons.
- If you still need the
UIAlertViewDelegate
delegate, you can set it in the constructorinitWithTitle:message:delegate:
. Or set it through thedelegate
property. - Don't mix and match
MEAlertView
methods withUIAlertView
methods. Stick with one or the other.
Copyright (C) 2013 Mike Enriquez
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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