UIAlertView用来显示一个对话框,能够设置对话框的标题、文案、按钮的个数和文案,也能够经过实现delegate来监听按钮的的点击操做。blog
使用UIAlertView时须要注意:字符串
self.alertView = [[UIAlertView alloc] initWithTitle:@"警告" message:@"警告你,做为男人必须负责,必须努力!" delegate:self cancelButtonTitle:@"取消"
//注意:otherButtonTitles能够接收多个字符串做为参数(直到遇到nil终止) otherButtonTitles:@"我是男人",@"我是女人",@"我是小孩", nil];
UIActivityIndicatorView就是你们耳熟能详的“转菊花”,使用该控件时须要注意:it
1.该控件的高度和宽度没法改变(不一样样式的菊花大小也不同);class
2.调用addSubView以后该控件也是不可见的,除非调用startAnimatingim
- (void) btnClicked : (UIButton*) btn { int tag = (int)btn.tag; if (tag == 101) { self.alertView = [[UIAlertView alloc] initWithTitle:@"警告" message:@"警告你,做为男人必须负责,必须努力!" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"我是男人",@"我是女人",@"我是小孩", nil]; [self.alertView show]; } else if (tag == 102) { self.indicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; self.indicatorView.frame = CGRectMake(100, 100, 80, 80); [self.view addSubview:self.indicatorView]; [self.indicatorView startAnimating]; } }