一些小知识记录

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