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RMUniversalAlert.m
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RMUniversalAlert.m
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//
// RMUniversalAlert.m
// RMUniversalAlert
//
// Created by Ryan Maxwell on 19/11/14.
// Copyright (c) 2014 Ryan Maxwell. All rights reserved.
//
#import <UIAlertView+Blocks/UIAlertView+Blocks.h>
#import <UIActionSheet+Blocks/UIActionSheet+Blocks.h>
#import <UIAlertController+Blocks/UIAlertController+Blocks.h>
#import "RMUniversalAlert.h"
static NSInteger const RMUniversalAlertNoButtonExistsIndex = -1;
static NSInteger const RMUniversalAlertCancelButtonIndex = 0;
static NSInteger const RMUniversalAlertDestructiveButtonIndex = 1;
static NSInteger const RMUniversalAlertFirstOtherButtonIndex = 2;
@interface RMUniversalAlert ()
@property (nonatomic) UIAlertController *alertController;
@property (nonatomic) UIAlertView *alertView;
@property (nonatomic) UIActionSheet *actionSheet;
@property (nonatomic, assign) BOOL hasCancelButton;
@property (nonatomic, assign) BOOL hasDestructiveButton;
@property (nonatomic, assign) BOOL hasOtherButtons;
@end
@implementation RMUniversalAlert
+ (UIViewController *)rootViewControllerWhichCanPresentModalViewController {
UIViewController *vc = ([UIApplication sharedApplication].keyWindow.rootViewController)? : [(UIWindow *)[[UIApplication sharedApplication].windows firstObject] rootViewController];
while (vc.presentedViewController) {
vc = vc.presentedViewController;
}
return vc;
}
+ (instancetype)showAlertInViewController:(UIViewController *)viewController
withTitle:(NSString *)title
message:(NSString *)message
cancelButtonTitle:(NSString *)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
otherButtonTitles:(NSArray *)otherButtonTitles
tapBlock:(RMUniversalAlertCompletionBlock)tapBlock
{
RMUniversalAlert *alert = [[RMUniversalAlert alloc] init];
alert.hasCancelButton = cancelButtonTitle != nil;
alert.hasDestructiveButton = destructiveButtonTitle != nil;
alert.hasOtherButtons = otherButtonTitles.count > 0;
if ([UIAlertController class]) {
alert.alertController = [UIAlertController showAlertInViewController:viewController
withTitle:title message:message
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles
tapBlock:^(UIAlertController *controller, UIAlertAction *action, NSInteger buttonIndex){
if (tapBlock) {
tapBlock(alert, buttonIndex);
}
}];
} else {
NSMutableArray *other = [NSMutableArray array];
if (destructiveButtonTitle) {
[other addObject:destructiveButtonTitle];
}
if (otherButtonTitles) {
[other addObjectsFromArray:otherButtonTitles];
}
alert.alertView = [UIAlertView showWithTitle:title
message:message
cancelButtonTitle:cancelButtonTitle
otherButtonTitles:other
tapBlock:^(UIAlertView *alertView, NSInteger buttonIndex){
if (tapBlock) {
if (buttonIndex == alertView.cancelButtonIndex) {
tapBlock(alert, RMUniversalAlertCancelButtonIndex);
} else if (destructiveButtonTitle) {
if (buttonIndex == alertView.firstOtherButtonIndex) {
tapBlock(alert, RMUniversalAlertDestructiveButtonIndex);
} else if (otherButtonTitles.count) {
NSInteger otherOffset = buttonIndex - alertView.firstOtherButtonIndex;
tapBlock(alert, RMUniversalAlertFirstOtherButtonIndex + otherOffset - 1);
}
} else if (otherButtonTitles.count) {
NSInteger otherOffset = buttonIndex - alertView.firstOtherButtonIndex;
tapBlock(alert, RMUniversalAlertFirstOtherButtonIndex + otherOffset);
}
}
}];
}
return alert;
}
+ (instancetype)showActionSheetInViewController:(UIViewController *)viewController
withTitle:(NSString *)title
message:(NSString *)message
cancelButtonTitle:(NSString *)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
otherButtonTitles:(NSArray *)otherButtonTitles
popoverPresentationControllerBlock:(void(^)(RMPopoverPresentationController *popover))popoverPresentationControllerBlock
tapBlock:(RMUniversalAlertCompletionBlock)tapBlock
{
RMUniversalAlert *alert = [[RMUniversalAlert alloc] init];
alert.hasCancelButton = cancelButtonTitle != nil;
alert.hasDestructiveButton = destructiveButtonTitle != nil;
alert.hasOtherButtons = otherButtonTitles.count > 0;
if ([UIAlertController class]) {
alert.alertController = [UIAlertController showActionSheetInViewController:viewController
withTitle:title
message:message
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles
popoverPresentationControllerBlock:^(UIPopoverPresentationController *popover){
if (popoverPresentationControllerBlock) {
RMPopoverPresentationController *configuredPopover = [RMPopoverPresentationController new];
popoverPresentationControllerBlock(configuredPopover);
popover.sourceView = configuredPopover.sourceView;
popover.sourceRect = configuredPopover.sourceRect;
popover.barButtonItem = configuredPopover.barButtonItem;
}
}
tapBlock:^(UIAlertController *controller, UIAlertAction *action, NSInteger buttonIndex){
if (tapBlock) {
tapBlock(alert, buttonIndex);
}
}];
} else {
void(^actionSheetTapBlock)(UIActionSheet *actionSheet, NSInteger buttonIndex) = ^(UIActionSheet *actionSheet, NSInteger buttonIndex){
if (tapBlock) {
if (buttonIndex == actionSheet.cancelButtonIndex) {
tapBlock(alert, RMUniversalAlertCancelButtonIndex);
} else if (buttonIndex == actionSheet.destructiveButtonIndex) {
tapBlock(alert, RMUniversalAlertDestructiveButtonIndex);
} else if (otherButtonTitles.count) {
NSInteger otherOffset = buttonIndex - actionSheet.firstOtherButtonIndex;
tapBlock(alert, RMUniversalAlertFirstOtherButtonIndex + otherOffset);
}
}
};
void (^standardActionSheetBlock)(void) = ^{
alert.actionSheet = [UIActionSheet showInView:viewController.view
withTitle:title
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles
tapBlock:actionSheetTapBlock];
};
if (popoverPresentationControllerBlock) {
RMPopoverPresentationController *configuredPopover = [RMPopoverPresentationController new];
popoverPresentationControllerBlock(configuredPopover);
if (configuredPopover.barButtonItem) {
alert.actionSheet = [UIActionSheet showFromBarButtonItem:configuredPopover.barButtonItem
animated:YES
withTitle:title
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles
tapBlock:actionSheetTapBlock];
} else if (configuredPopover.sourceView) {
alert.actionSheet = [UIActionSheet showFromRect:configuredPopover.sourceRect
inView:configuredPopover.sourceView
animated:YES
withTitle:title
cancelButtonTitle:cancelButtonTitle
destructiveButtonTitle:destructiveButtonTitle
otherButtonTitles:otherButtonTitles
tapBlock:actionSheetTapBlock];
} else {
standardActionSheetBlock();
}
} else {
standardActionSheetBlock();
}
}
return alert;
}
#pragma mark -
- (BOOL)visible
{
if (self.alertController) {
return self.alertController.visible;
} else if (self.alertView) {
return self.alertView.visible;
} else if (self.actionSheet) {
return self.actionSheet.visible;
}
NSAssert(false, @"Unsupported alert.");
return NO;
}
- (NSInteger)cancelButtonIndex
{
if (!self.hasCancelButton) {
return RMUniversalAlertNoButtonExistsIndex;
}
return RMUniversalAlertCancelButtonIndex;
}
- (NSInteger)firstOtherButtonIndex
{
if (!self.hasOtherButtons) {
return RMUniversalAlertNoButtonExistsIndex;
}
return RMUniversalAlertFirstOtherButtonIndex;
}
- (NSInteger)destructiveButtonIndex
{
if (!self.hasDestructiveButton) {
return RMUniversalAlertNoButtonExistsIndex;
}
return RMUniversalAlertDestructiveButtonIndex;
}
@end