在内部添加方法时 UISegmentedControl Changed 事件失火
这是我的 UISegmentedControl 的 UIControlEventValueChanged 事件代码：
- (void)segmentAction:(id)sender{
if([sender selectedSegmentIndex] == 0){
pendingIsShowing = YES;
[freeCutsTable reloadSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationFade];
}else if([sender selectedSegmentIndex] == 1){
pendingIsShowing = NO;
[self showAvailableCuts:sender];
[freeCutsTable reloadSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationFade];
}
}
我的问题是当值更改时，[self showAvailableCuts:sender] 是调用，但段控件不再更改其索引。如果我注释掉方法调用，它就可以正常工作...我尝试做的是将分段控件传递到 [self showAvailableCuts:sender] 并以这种方式更改它，但无济于事。 ..
- (void)showAvailableCuts:(id)sender{
if(!pendingIsShowing){
NSString *path =@"https://WebserviceURL";
NSString* escapedUrl = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//[sender setSelectedIndex:1];
NSLog(@"%@", escapedUrl);
[self parseXMLFileAtURL:escapedUrl];
}
}
我不确定为什么会发生这种情况...
Here is my code for the UIControlEventValueChanged event for a UISegmentedControl:
- (void)segmentAction:(id)sender{
if([sender selectedSegmentIndex] == 0){
pendingIsShowing = YES;
[freeCutsTable reloadSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationFade];
}else if([sender selectedSegmentIndex] == 1){
pendingIsShowing = NO;
[self showAvailableCuts:sender];
[freeCutsTable reloadSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationFade];
}
}
My problem is when the value is changed, the [self showAvailableCuts:sender] is called, but the segment control no longer changes its index. If I comment out the method call, it works fine...What I tried to do was pass in the segmented control into [self showAvailableCuts:sender] and change it that way, but to no avail...
- (void)showAvailableCuts:(id)sender{
if(!pendingIsShowing){
NSString *path =@"https://WebserviceURL";
NSString* escapedUrl = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//[sender setSelectedIndex:1];
NSLog(@"%@", escapedUrl);
[self parseXMLFileAtURL:escapedUrl];
}
}
I'm not sure why this is occurring...
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不看
[self showAvailableCuts:sender];的代码，我能想到的就是 - 为什么需要传递“sender”对象本身？只需修改 showAvailableCuts 方法，以便您只需要传递所需的值，例如[sender titleForSegmentAtIndex:]、[sender selectedSegmentIndex]等。好的，首先是 setter应该是
[sender setSelectedSegmentIndex:index]而不是您注释掉的内容。我自己成功地使用了这个 -Without looking at the code for
[self showAvailableCuts:sender];all I can think of is - why do you need to pass the 'sender' object itself? Just modify the showAvailableCuts method so that you need to pass only the required value(s) like[sender titleForSegmentAtIndex:],[sender selectedSegmentIndex]etc.ok, firstly the setter should be
[sender setSelectedSegmentIndex:index]not what you have commented out. I have myself successfully used this -