Are you tired of writing an ugly and big -prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender: method like that?
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"segue1"]) {
UIViewController *destination = segue.destinationViewController;
destination.view.backgroundColor = [UIColor redColor];
} else if ([segue.identifier isEqualToString:@"segue2"]) {
UIViewController *destination = segue.destinationViewController;
destination.view.backgroundColor = [UIColor blueColor];
} else if ([segue.identifier isEqualToString:@"segue3"]) {
UIViewController *destination = segue.destinationViewController;
destination.view.backgroundColor = [UIColor greenColor];
}
...
}Check UIViewController+BlockSegue and enjoy defining a block which will be executed to prepare segue in the same place which you call to performSegue.
IMPORTANT: if you override -prepareForSegue:sender: method, BlockSegue won't be performed in these UIViewController.
Install
Use UIViewController+BlockSegue category it's really easy, you only need to drop UIViewController+BlockSegue folder to your project, or if you are a CocoaPods-lover, you can include this line in your Podfile as usual:
pod 'UIViewController+BlockSegue'
After that, you need to import UIViewController+BlockSegue.h on each view controller where you want to configure segues.
Use
UIViewController+BlockSegue can be used in two ways: inline (when you performSegue programatically) or independently (in other line).
Inline
Perform segue and configure the block which is executed in the same sentence.
[self performSegueWithIdentifier:@"segueIdentifier" sender:nil withBlock:^(id sender, id destinationVC, UIStoryboardSegue *segue) {
NSLog(@"Segue configured inline");
destinationVC.user = tmpUser;
}];Independently
Configure segue block independently of his execution, this way could be called on viewDidLoad for example, and it's run with both the call performSegueWithIdentifier:sender: method and storyboard segue perform.
[self configureSegue:@"segueIdentifier" withBlock:^(id sender, id destinationVC, UIStoryboardSegue *segue); {
NSLog(@"I'm a block fired with the segue!");
}];Testing
I added some tests as personal exercise, but if you want run them, exec script (it uses xcpretty by supermarin):
./run_tests.sh
Acknowledges
- You can see a list of contributors to this repo. Thanks to everybody!
- Special thanks to @luisobo for support me with
runtime.h, thanks buddy!. - I found very useful the NSHipster about method swizzling.
- It was inspired by UIAlertView-Blocks, which helps you to write good-looking code with sad UIAlertView interface / delegates.
Author
- Jorge Maroto (@patoroco).
License
UIViewController+BlockSegue is available under the MIT license. See the LICENSE file for more info.
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