Question

我使用Objective-C创建了活动表。当我想获得所选的按钮标题时，我卡住了。请帮我。（我知道有一种委托方法来获取操作的标题。但它在iOS 8.0+中已被弃用。）这是我的代码。我的要求是获取所选标题并将其更新为文本字段。

NSArray *subjectType = [NSArray arrayWithObjects:@"Customer Service",@"Product Info",@"Deals",@"Special",@"Others", nil];

    UIAlertController *subjectSheet = [UIAlertController alertControllerWithTitle:@"Subjects" message:@"Select a prefered subject" preferredStyle:UIAlertControllerStyleActionSheet];


    for (int i=0; i<subjectType.count; i++) {
        UIAlertAction *myalertAction = [UIAlertAction actionWithTitle:[subjectType objectAtIndex:i] style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

        }];


    [subjectSheet addAction:myalertAction];
}

Answer 1

尝试UIAlertAction

的title属性

 UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Title"
                                                               message:@"message"
                                                        preferredStyle:UIAlertControllerStyleActionSheet];
[alert addAction:[UIAlertAction actionWithTitle:@"OK"
                                          style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
                                              NSLog(@"%@",action.title);
                                          }]];
[self presentViewController:alert animated:true completion:nil];

Answer 2

你可以做下面的事情来实现你想要实现的目标

NSArray *subjectType = [NSArray arrayWithObjects:@"Customer Service",@"Product Info",@"Deals",@"Special",@"Others", nil];

UIAlertController *subjectSheet = [UIAlertController alertControllerWithTitle:@"Subjects" message:@"Select a prefered subject" preferredStyle:UIAlertControllerStyleActionSheet];


for (int i=0; i<subjectType.count; i++) {
    UIAlertAction *myalertAction = [UIAlertAction actionWithTitle:[subjectType objectAtIndex:i] style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
          [self takeActionAccordingToString:action.title];
    }];


[subjectSheet addAction:myalertAction];
[self presentViewController:subjectSheet animated:YES completion:nil];
}
-(void)takeActionAccordingToString:(NSString *)actionTitle{
if([actionTitle isEqualToString:[yourArray objectAtIndex:0]]){
//you can take action here
}
if([actionTitle isEqualToString:[yourArray objectAtIndex:1]]){
//you can take action here
}
if([actionTitle isEqualToString:[yourArray objectAtIndex:2]]){
//you can take action here
}
if([actionTitle isEqualToString:[yourArray objectAtIndex:3]]){
//you can take action here
}
if([actionTitle isEqualToString:[yourArray objectAtIndex:4]]){
//you can take action here
}
//etc....
}

从添加到UIAlertViewController的UIAlertAction表中获取所选按钮标题

2 个答案: