我有类似下面的代码。第一次出现（在按钮IBAction中）时，该操作表运行doSomething OK，但是，第二次出现时，则没有任何反应。任何想法？
@implementation ...
- (void) setActions {
UIAlertAction *opt1 = [UIAlertAction actionWithTitle:@"Option 1" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self doSomething:@"opt1"];}];
UIAlertAction *opt2 = [UIAlertAction actionWithTitle:@"Option 2" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self doSomething:@"opt2"];}];
UIAlertAction *opt3 = ...
self.opt1 = opt1;
self.opt2 = opt2;
self.opt3 = opt3;
- (void) showActionSheet {
...
UIAlertController *selectAS = [UIAlertController alertControllerWithTitle:@"Select Options"
message:@"msg" preferredStyle:UIAlertControllerStyleActionSheet];
if (xyz) {
[selectAS addAction:self.opt1];
[selectAS addAction:self.opt2];
}
else{
[selectAS addAction:self.opt1];
[selectAS addAction:self.opt3];
}
[self presentViewController:selectqAS
animated:YES completion:nil];
}
- (void) doSomething: (NSString *) opt{
....
}
最佳答案
很高兴我们让您开始运作。我的猜测是您的方法在翻译中迷失了方向。您有相互缠绕的方法，这可能会引起混乱，尤其是与self.opt1。根据我的评论，现在iOS8引入了UIAlertController，它带有完成处理程序，您应该对此进行相应的计划：类似以下内容：
-(IBAction)showActionSheet {
UIAlertController *selectAS = [UIAlertController alertControllerWithTitle:@"Select Options" message:@"msg" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *opt1 = [UIAlertAction actionWithTitle:@"Option 1" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
//Don't have to call another method, just put your action 1 code here. This is the power of completion handlers creating a more structured outline
}];
UIAlertAction *opt2 = [UIAlertAction actionWithTitle:@"Option 2" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
//Don't have to call another method, just put your action 2 code here. This is the power of completion handlers creating a more structured outline
}];
UIAlertAction *opt3 = ...
if (xyz) {
[selectAs addAction:opt1];
[selectAs addAction:opt2];
} else {
[selectAs addAction:opt1];
[selectAs addAction:opt3];
}
[self presentViewController:selectAs animated:YES completion:nil];
}
更清洁，并且实际上将UIAlertController用于其预期目的，而无需其他方法调用。
关于ios - UIAlertController操作表第二次不响应，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28555529/