小菊花和UITextField

UIActivityIndicatorView

self.view.backgroundColor = [UIColor yellowColor];

self.indicator =[[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
self.indicator.layer.borderWidth = 1;
self.indicator.backgroundColor = [UIColor redColor];
self.indicator.layer.cornerRadius = 10;
[self.view addSubview:self.indicator];
[self.indicator release];

[self.indicator startAnimating];

延迟一段时间调用方法

[self performSelector:@selector(endIndicator) withObject:self afterDelay:5];

UITextField

self.textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 40, self.view.frame.size.width, 300)];
self.view.backgroundColor = [UIColor whiteColor];
//设置textview里面的字体颜色
self.textView.textColor = [UIColor blackColor];
//设置字体名字和字体大小
self.textView.font = [UIFont fontWithName:@"Arial" size:22.0];
//设置它的代理方法
self.textView.delegate = self;
//边框圆角
self.textView.layer.borderWidth = 2;
self.textView.layer.cornerRadius = 10;
//设置它的背景颜色
self.textView.backgroundColor = [UIColor clearColor];
//返回键的类型
self.textView.returnKeyType = UIReturnKeyDefault;
//键盘类型
self.textView.keyboardType = UIKeyboardTypeDefault;

// placeHolder
self.placeHolderView = [[UITextView alloc] initWithFrame:self.textView.frame];
self.placeHolderView.text = @"程紧乐程紧乐程紧乐";
[self.view addSubview:self.placeHolderView];
self.placeHolderView.font = [UIFont fontWithName:@"Arial" size:22.0];
self.placeHolderView.textColor = [UIColor lightGrayColor];

//加入到整个页面中
[self.view addSubview: self.textView];
// 置顶
[self.view bringSubviewToFront:self.textView];
// 放到下面
//    [self.view sendSubviewToBack:(nonnull UIView *)]

下拉菜单

UIMenuItem *markItem = [[UIMenuItem alloc]initWithTitle:@"标记" action:@selector(changeColor:)];
UIMenuItem *brightItem = [[UIMenuItem alloc] initWithTitle:@"高亮" action:@selector(bright:)];
UIMenuController *menu = [UIMenuController sharedMenuController];
[menu setMenuItems:[NSArray arrayWithObjects:markItem,brightItem, nil]];