原文链接：http://www.cnblogs.com/elfsundae/archive/2010/11/11/1874486.html
一、UILabel
二、UIButton
常用事件：Touch Up Inside
三、UITextField
常用属性：
Text:要显示的文本。
Placeholder:指定将要在文本字段中以灰色显示的占位符文本。
Clear When Editing Begins:用户触摸此字段时是否删除字段中的值。
Text Input Traits:文本输入特征。
四、UIImageView
常用属性：
image:指定图像文件
Mode:图像在视图内部的对齐方式以及是否缩放图像以适应视图。选择任何图像缩放的选项都会潜在地增加处理开销，因此最好避开这些选项，并在导入图像之前调整好图像大小。通常Mode属性为Center。
Alpha：图像透明度。一般设置为1.0
Background:该属性继承自UIView，但它不会影响图像视图的外观，请忽略此属性。
Drawing复选框：选中Opaque表示视图后面的任何内容都不应该绘制，并且允许iPhone都绘图方法通过一些优化来加速绘图。
Clear Context Before Drawing:选中它之后，iPhone将使用透明黑色绘制控件覆盖都所有区域，然后才实际绘制控件。考虑到性能问题，并且适用情况很少，通常很少需要选中ClearContext Before Drawing。
Interaction复选框：
User Interaction Enabled:指定用户能否对此对象进行操作。
Multiple Touch：是否能够接收多点触摸事件。
五：UISlider(滑块)
常用属性：Value Changed
示例：
// 将 silder 的值反映到 sliderLabel
- ( IBAction ) sliderValueChanged: ( id )sender
{
UISlider *slider = ( UISlider *)sender;
int progressAsInt = ( int )(slider. value + 0.5f);
NSString *newText = [[ NSString alloc ] initWithFormat : @"%d" , progressAsInt];
sliderLabel. text = newText;
[newText release ];
}
六：UISwitch(开关)
// 属性on：获取开关的状态是否为on // 方法setOn：设置开关的状态 - (IBAction) switchChanged: (id)sender { UISwitch *whichSwitch = (UISwitch *)sender; BOOL setting = whichSwitch.on; [leftSwitch setOn:setting animated:YES]; [rightSwitch setOn:setting animated:YES]; }
七、UISegmentedControl
#define kSegmentIndex_Switches 0 #define kSegmentIndex_Button 1 - (IBAction) segmentChanged: (id)sender { switch ([sender selectedSegmentIndex]) { case kSegmentIndex_Switches: leftSwitch.hidden = NO; rightSwitch.hidden = NO; doSomethingButton.hidden = YES; break; case kSegmentIndex_Button: leftSwitch.hidden = YES; rightSwitch.hidden = YES; doSomethingButton.hidden = NO; break; } }
八、UIActionSheet（操作表）和UIAlertView（警报）
UIActionSheet用于迫使用户在两个或更多选项之间进行选择的模式视图。操作表从屏幕底部弹出，显示一系列按钮供用户选择，用户只有单击了一个按钮后才能继续使用使用应用程序。
UIAlertView（警报）以蓝色圆角矩形都形式出现在屏幕的中部，警报可显示一个或多个按钮。
为了让控制器类充当操作表的委托，控制器类需要遵从UIActionSheetDelegate 协议。我们通过在类声明都超类之后都尖括号中添加协议名称来实现。
@interface UntitledViewController : UIViewController <UIActionSheetDelegate> { // .... }
// 创建操作表： - (IBAction) buttonPressed: (id)sender { UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Are you sure?" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Yes,I'm sure." otherButtonTitles:nil]; [actionSheet showInView:self.view]; [actionSheet release]; }
// 实现方法： #pragma mark ActionSheet Delegate Methods - (void) actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex { if (buttonIndex != [actionSheet cancelButtonIndex]) { NSString *text = [[NSString alloc] initWithFormat:@"test alert"]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Something was done." message:text delegate:self cancelButtonTitle:@"OK!" otherButtonTitles:nil]; [alert show]; [alert release]; [text release]; } } //- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex //{ // NSLog(@"%d",buttonIndex); //}
示例：
视图有一个UISegmentedControl,"Switches"下有两个UISwitch
"Button"下有一个“Do Something"的UIButton
触摸"Do Something"Button时弹出UIActionSheet
触摸选择"Yes,I'm sure."时弹出 UIAlertView
OBJECTIVE-C CODE :UntitledViewController.h // // UntitledViewController.h // Untitled // // Created by Elf Sundae on 11/10/10. // Copyright 2010 www.cnBlogs.com/ElfSundae. All rights reserved. // #import <UIKit/UIKit.h> #define kSegmentIndex_Switches 0 #define kSegmentIndex_Button 1 @interface UntitledViewController : UIViewController <UIActionSheetDelegate> { UISwitch * leftSwitch; UISwitch * rightSwitch; UIButton * doSomethingButton; } @property (retain, nonatomic) IBOutlet UISwitch *leftSwitch; @property (retain, nonatomic) IBOutlet UISwitch *rightSwitch; @property (retain, nonatomic) IBOutlet UIButton *doSomethingButton; - (IBAction) switchChanged: (id)sender; - (IBAction) segmentChanged: (id)sender; - (IBAction) buttonPressed: (id)sender; @end OBJECTIVE-C CODE :UntitledViewController.m // // UntitledViewController.m // Untitled // // Created by Elf Sundae on 11/10/10. // Copyright 2010 www.cnBlogs.com/ElfSundae. All rights reserved. // #import "UntitledViewController.h" @implementation UntitledViewController @synthesize leftSwitch; @synthesize rightSwitch; @synthesize doSomethingButton; // 属性on：获取开关的状态是否为on // 方法setOn：设置开关的状态 - (IBAction) switchChanged: (id)sender { UISwitch *whichSwitch = (UISwitch *)sender; BOOL setting = whichSwitch.on; [leftSwitch setOn:setting animated:YES]; [rightSwitch setOn:setting animated:YES]; } - (IBAction) segmentChanged: (id)sender { switch ([sender selectedSegmentIndex]) { case kSegmentIndex_Switches: leftSwitch.hidden = NO; rightSwitch.hidden = NO; doSomethingButton.hidden = YES; break; case kSegmentIndex_Button: leftSwitch.hidden = YES; rightSwitch.hidden = YES; doSomethingButton.hidden = NO; break; } } - (IBAction) buttonPressed: (id)sender { UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Are you sure?" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Yes,I'm sure." otherButtonTitles:nil]; [actionSheet showInView:self.view]; [actionSheet release]; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; self.leftSwitch = nil; self.rightSwitch = nil; self.doSomethingButton = nil; [super viewDidUnload]; } - (void)dealloc { [leftSwitch release]; [rightSwitch release]; [doSomethingButton release]; [super dealloc]; } #pragma mark - #pragma mark ActionSheet Delegate Methods - (void) actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex { if (buttonIndex != [actionSheet cancelButtonIndex]) { NSString *text = [[NSString alloc] initWithFormat:@"test alert"]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Something was done." message:text delegate:self cancelButtonTitle:@"OK!" otherButtonTitles:nil]; [alert show]; [alert release]; [text release]; } } //- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex //{ // NSLog(@"%d",buttonIndex); //} @end 项目下载
