在代码中移动UIButtons

Question

我的代码显示单击按钮时，下面的按钮会向下移动。我想知道当再次点击按钮时是否可以这样做，下面的按钮会移回原来的位置。

·H

@interface ViewController : UIViewController  {

IBOutlet UIButton *button;
}

-(IBAction)buttonClicked:(id)sender;
-(IBAction)buttonClicked1:(id)sender;

@end

的.m

- (void)buttonClicked:(id)sender {
CGRect frame = button.frame;
frame.origin.x = 65; // new x coordinate
frame.origin.y = 130; // new y coordinate
button.frame = frame;
}

Answer 1

您可以使用BOOL跟踪状态并存储startRect以便将按钮移回

·H

@interface ViewController : UIViewController  {
BOOL buttonShifted;
CGRect startRect;
IBOutlet UIButton *button;
}

-(IBAction)buttonClicked:(id)sender;
-(IBAction)buttonClicked1:(id)sender;

@end

的.m

// make sure to set the original button frame when view loads
// ie startRect = button.frame;

- (void)buttonClicked:(id)sender {
if (buttonShifted) {
    button.frame = startRect;
} else {
    CGRect frame = button.frame;
    frame.origin.x = 65; // new x coordinate
    frame.origin.y = 130; // new y coordinate
    button.frame = frame;
}
    buttonShifted = !buttonShifted;
}