108 lines
3.1 KiB
Objective-C
108 lines
3.1 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import "RCTAlertManager.h"
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#import "RCTLog.h"
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@interface RCTAlertManager() <UIAlertViewDelegate>
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@end
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@implementation RCTAlertManager
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{
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NSMutableArray *_alerts;
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NSMutableArray *_alertCallbacks;
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NSMutableArray *_alertButtonKeys;
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}
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- (instancetype)init
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{
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if ((self = [super init])) {
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_alerts = [[NSMutableArray alloc] init];
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_alertCallbacks = [[NSMutableArray alloc] init];
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_alertButtonKeys = [[NSMutableArray alloc] init];
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}
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return self;
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}
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/**
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* @param {NSDictionary} args Dictionary of the form
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*
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* @{
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* @"message": @"<Alert message>",
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* @"buttons": @[
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* @{@"<key1>": @"<title1>"},
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* @{@"<key2>": @"<cancelButtonTitle>"},
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* ]
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* }
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* The key from the `buttons` dictionary is passed back in the callback on click.
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* Buttons are displayed in the order they are specified. If "cancel" is used as
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* the button key, it will be differently highlighted, according to iOS UI conventions.
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*/
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- (void)alertWithArgs:(NSDictionary *)args callback:(RCTResponseSenderBlock)callback
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{
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RCT_EXPORT();
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NSString *title = args[@"title"];
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NSString *message = args[@"message"];
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NSArray *buttons = args[@"buttons"];
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if (!title && !message) {
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RCTLogError(@"Must specify either an alert title, or message, or both");
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return;
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} else if (buttons.count == 0) {
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RCTLogError(@"Must have at least one button.");
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return;
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}
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dispatch_async(dispatch_get_main_queue(), ^{
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UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
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message:message
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delegate:self
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cancelButtonTitle:nil
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otherButtonTitles:nil];
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NSMutableArray *buttonKeys = [[NSMutableArray alloc] initWithCapacity:buttons.count];
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NSInteger index = 0;
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for (NSDictionary *button in buttons) {
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if (button.count != 1) {
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RCTLogError(@"Button definitions should have exactly one key.");
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}
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NSString *buttonKey = [button.allKeys firstObject];
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NSString *buttonTitle = [button[buttonKey] description];
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[alertView addButtonWithTitle:buttonTitle];
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if ([buttonKey isEqualToString: @"cancel"]) {
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alertView.cancelButtonIndex = index;
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}
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[buttonKeys addObject:buttonKey];
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index ++;
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}
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[_alerts addObject:alertView];
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[_alertCallbacks addObject:callback ?: ^(id unused) {}];
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[_alertButtonKeys addObject:buttonKeys];
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[alertView show];
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});
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}
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#pragma mark - UIAlertViewDelegate
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- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
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{
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NSUInteger index = [_alerts indexOfObject:alertView];
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RCTAssert(index != NSNotFound, @"Dismissed alert was not recognised");
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RCTResponseSenderBlock callback = _alertCallbacks[index];
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NSArray *buttonKeys = _alertButtonKeys[index];
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callback(@[buttonKeys[buttonIndex]]);
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[_alerts removeObjectAtIndex:index];
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[_alertCallbacks removeObjectAtIndex:index];
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[_alertButtonKeys removeObjectAtIndex:index];
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}
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@end
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