在检查其他方法问题之前调用 shouldPerformSegueWithIdentifier
shouldPerformSegueWithIdentifier called before checking other method issue
我正在尝试进行 segue,但我有一个小问题,即我正在单击一个按钮,如果布尔值是 YES,它将 return YES in segue else return 不,但每次我都必须点击两次来检查文本字段,因为它首先传递给 shouldPerformSegueWithIdentifier
而它应该首先检查 IBAction。
请问我该如何解决这个问题?
- (IBAction)search:(id)sender{
if ([_txtfld.text isEqual:@"test"]) {
push = YES; //Bolean
}
else {
push = NO; //Bolean
}
}
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
if ([identifier isEqualToString:@"SearchSegue"] && push==YES) {
NSLog(@"Showed");
return YES;
}
else{
NSLog(@"Not showed");
return NO;
}
}
您需要从按钮中的操作中删除 segue,将其移至视图控制器,然后在 IBAction
方法中调用 performSegueWithIdentifier
,或者仅在 shouldPerformSegueWithIdentifier
并删除 IBAction
方法。
所以,要么 -
- (IBAction)search:(id)sender{
if ([self.txtfld.text isEqual:@"test"]) {
[self performSegueWithIdentifier:@"SearchSegue" sender:self];
}
}
并摆脱 shouldPerformSegueWithIdentifier
或摆脱 IBAction
方法而只有 -
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
BOOL ret=YES;
if ([identifier isEqualToString:@"SearchSegue"]) {
if (![self.txtfld.text isEqual:@"test"]) {
ret=NO;
}
}
return ret;
}
我正在尝试进行 segue,但我有一个小问题,即我正在单击一个按钮,如果布尔值是 YES,它将 return YES in segue else return 不,但每次我都必须点击两次来检查文本字段,因为它首先传递给 shouldPerformSegueWithIdentifier
而它应该首先检查 IBAction。
请问我该如何解决这个问题?
- (IBAction)search:(id)sender{
if ([_txtfld.text isEqual:@"test"]) {
push = YES; //Bolean
}
else {
push = NO; //Bolean
}
}
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
if ([identifier isEqualToString:@"SearchSegue"] && push==YES) {
NSLog(@"Showed");
return YES;
}
else{
NSLog(@"Not showed");
return NO;
}
}
您需要从按钮中的操作中删除 segue,将其移至视图控制器,然后在 IBAction
方法中调用 performSegueWithIdentifier
,或者仅在 shouldPerformSegueWithIdentifier
并删除 IBAction
方法。
所以,要么 -
- (IBAction)search:(id)sender{
if ([self.txtfld.text isEqual:@"test"]) {
[self performSegueWithIdentifier:@"SearchSegue" sender:self];
}
}
并摆脱 shouldPerformSegueWithIdentifier
或摆脱 IBAction
方法而只有 -
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
BOOL ret=YES;
if ([identifier isEqualToString:@"SearchSegue"]) {
if (![self.txtfld.text isEqual:@"test"]) {
ret=NO;
}
}
return ret;
}