Question

Implemented some barbuttons by using below code,

UISegmentedControl *button = [[[UISegmentedControl alloc] initWithItems:
    [NSArray arrayWithObjects:@"", nil]] autorelease];
button.momentary = YES;
button.segmentedControlStyle = UISegmentedControlStyleBar;

UIBarButtonItem *barButton = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];

I used set action for the button using this code,

[button addTarget:self 
           action:@selector(drawOnImageByColor:) 
 forControlEvents:UIControlEventTouchUpInside];

Answer 1

变化

[button addTarget:self 
           action:@selector(drawOnImageByColor:) 
 forControlEvents:UIControlEventValueChanged];

Answer 2

使用该守则

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(drawOnImageByColor:)];
self.navigationItem.rightBarButtonItem = rightButton;
[rightButton release];

Answer 3

你必须确定你按惯例增加的纽托邦的行动。

友情链接