我有4个这样的单选按钮: ChangeLabel.text = @"Hint: try a partial phrase suchas 'cab' to find information on the single-vineyard cabernet's made at the Arcadian Winery";
- (IBAction)optGrape:(i
下面的IBAction将在代码中没有bookCoverUp.alpha = 0;时运行,但是一旦我添加了该代码并尝试运行该程序,IBAction就会完全停止工作。-(IBAction)done:(id)sender bookCoverUp.alpha = 0;
//this sends you to the desired viewcontroller