27、iOS界面控件全解析

iOS界面控件全解析

1. 按钮代码

在iOS开发中，除了使用Interface Builder创建按钮对象外，还可以通过编程方式创建。以UICatalog应用为例，它多数对象都是通过代码创建的。下面是创建圆角按钮的代码示例：

- (UIButton *)roundedButtonType

{

if (roundedButtonType == nil)

{

roundedButtonType = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];

roundedButtonType.frame = CGRectMake(182.0, 5.0,

kStdButtonWidth, kStdButtonHeight);

[roundedButtonType setTitle:@"Rounded" forState:UIControlStateNormal];

roundedButtonType.backgroundColor = [UIColor clearColor];

[roundedButtonType addTarget:self action:@selector(action:)

forControlEvents:UIControlEventTouchUpInside];

roundedButtonType.tag = kViewTa