触摸屏幕监听的函数 (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
}
取消弹出的键盘 只要释放当前文本框的第一响应者 [self.Outlable resignFirstResponder];
for(object *b in M){} M为一个集合
视图 黑屏是 查看是否设置了第一个显示的界面
ie
Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' - perhaps the designated entry point is not set?
在ViewControl中属性检查中 ViewController中的 is Initial View Controller勾选