UIAlerController Action Sheet 第二次调用时没有响应
UIAlerController Action Sheet does not respond the second time it's called
我有类似下面的代码。 Action sheet 第一次出现时运行 doSomething OK(在按钮 IBAction 中),但是当它第二次出现时,没有任何反应,Action sheet 没有调用 do something 就消失了。有什么想法吗?
@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{
....
}
很高兴我们让你起来 运行。我的猜测是您的方法在翻译中丢失了。您有相互交织的方法,这可能会导致混淆,特别是 self.opt1
。根据我的评论,现在 iOS8 已经引入了 UIAlertController
,它带有完成处理程序,您应该相应地计划:如下所示:
-(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];
}
更简洁,实际上将 UIAlertController 用于预期目的,不需要调用其他方法。
我有类似下面的代码。 Action sheet 第一次出现时运行 doSomething OK(在按钮 IBAction 中),但是当它第二次出现时,没有任何反应,Action sheet 没有调用 do something 就消失了。有什么想法吗?
@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{
....
}
很高兴我们让你起来 运行。我的猜测是您的方法在翻译中丢失了。您有相互交织的方法,这可能会导致混淆,特别是 self.opt1
。根据我的评论,现在 iOS8 已经引入了 UIAlertController
,它带有完成处理程序,您应该相应地计划:如下所示:
-(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];
}
更简洁,实际上将 UIAlertController 用于预期目的,不需要调用其他方法。