Question

我试图创建一个能够改变第一个视图控制器的全局色调的设置页面。

继承人我拥有的东西（设置视图控制器＆amp;是的颜色还没有）：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

if ([[segue identifier] isEqualToString:@"settingsSeque"]) {
    ViewController *tintColorChange = [segue destinationViewController];
    tintColorChange.view.tintColor = self.view.tintColor;

}



}


- (IBAction)tapRed:(UITapGestureRecognizer *)sender {
self.view.tintColor = [UIColor colorWithRed:1 green:0 blue:0 alpha:1];


}

- (IBAction)tapYellow:(UIButton *)sender {
self.view.tintColor = [UIColor colorWithRed:.5 green:.3 blue:.1 alpha:1];
}

- (IBAction)tapGreen:(UIButton *)sender {
 self.view.tintColor = [UIColor colorWithRed:0 green:1 blue:0 alpha:1];
}

- (IBAction)tapBlue:(UIButton *)sender {
 self.view.tintColor = [UIColor colorWithRed:0 green:0 blue:1 alpha:1];
}

- (IBAction)tapOrange:(UIButton *)sender {
self.view.tintColor = [UIColor colorWithRed:.75 green:.5 blue:0 alpha:1];
}

对于第一个视图控制器：

- (void)viewDidLoad
{



[super viewDidLoad];

self.view.tintColor = tintColorChange;

我做错了什么？

Answer 1

在SettingsViewController中创建一个委托引用：

@interface SettingsViewController ()
     @property (nonatomic) FirstViewController *delegateReference;
@end

将FirstViewController实例设置为delegateReference：

settingsViewController.delegateReference = firstViewController;

在FirstViewController中创建一个方法：

- (void)setBackgroundColor:(UIColor *)color {
    self.view.backgroundColor = color;
}

现在在您的SettingsViewController按钮点击事件回调：

- (IBAction)tapGreen:(UIButton *)sender {
    if (self.delegateReference) {
        [self.delegateReference setBackgroundColor:[UIColor greenColor]];
    }
}

同样正如Afonso Tsukamoto指出的那样，将delegateReference放在单例类中是个好主意。

在视图控制器之间传递色调颜色

1 个答案: