iPhone的UI标准和基本UI控.ppt

iPhone的基本UI控件使用,iPhone系统标准UI，UI控件使用,通过上节课的介绍，大家对于iPhone的整个框架和语法有了大致了解。本节课程将具体介绍iPhone的UI标准和UIView上的UI子控件。,上节回顾,iPhone系统标准UI介绍UI规范输入控件（UITextField/返回NO讲禁止编辑-(void)textFieldDidBeginEditing;/当键盘得到焦点的时候，调用此方法-(BOOL)textFieldShouldEndEditing;/如果返回NO将会限制键盘掉下-(void)textFieldDidEndEditing:/键盘已经掉下-(BOOL)textField:(UITextField*)textFieldshouldChangeCharactersInRange:(NSRange)rangereplacementString:(NSString*)string;/返回no输入字符无效-(BOOL)textFieldShouldClear:(UITextField*)textField;-(BOOL)textFieldShouldReturn:(UITextField*)textField;NotificationUITextFieldTextDidBeginEditingNotification;UITextFieldTextDidEndEditingNotification;UITextFieldTextDidChangeNotification;,UITextView,继承树：UIScrollView:UIView:UIResponder:NSObject描述：UITextView是相对复杂可用作多行输入的控件属性：textpropertyfontpropertytextColorpropertyeditablepropertydataDetectorTypespropertytextAlignmentpropertyselectedRangeproperty方法：hasText：scrollRangeToVisible:通告：UITextViewTextDidBeginEditingNotificationUITextViewTextDidChangeNotificationUITextViewTextDidEndEditingNotification,Delegate：-(BOOL)textViewShouldBeginEditing:(UITextView*)textView;-(BOOL)textViewShouldEndEditing:(UITextView*)textView;-(void)textViewDidBeginEditing:(UITextView*)textView;-(void)textViewDidEndEditing:(UITextView*)textView;-(BOOL)textView:(UITextView*)textViewshouldChangeTextInRange:(NSRange)rangereplacementText:(NSString*)text;-(void)textViewDidChange:(UITextView*)textView;-(void)textViewDidChangeSelection:(UITextView*)textView;,UIButton,继承树：UIControl：UIView:UIResponder:NSObject讨论主题：button是什么。怎么创建button怎么使用button。,什么是button,创建方式：+buttonWithType：-initWithFrame：配置buttonbuttonTypeFontlinebreakMode/当标题或者图片超过frame大小时采取的截断方式（3.x以后不用此属性）titleShadhowOffset/阴影的偏移量（3.x后不用此属性）,怎么创建button,-setTitle：forState：-setTitleColor:forState:-setTitleShadowColor:forStatetitleColorForState:titleForState:titleShadowColorForState:,标题文字操作,设置状态：adjustsImageWhenHighlightedpropertyadjustsImageWhenDisabledpropertyshowsTouchWhenHighlightedproperty/Highlighted表示点击后的状态/forState通常这个state我可以设置为UIContrlStateNormal，如果点击后需要做还图片的操作，我们可以设置UIControlStateHeightLight的图片imageForState:setBackgroundImage:forState:setImage:forState:设置边框contentEdgeInsetspropertytitleEdgeInsetspropertyimageEdgeInsetsproperty/设置边距使用UIEdgeInsets结构体，分别设置其上下左右的位置即可。,图片操作,添加事件：buttonaddTarget:targetaction:selectorforControlEvents:UIControlEventTouchUpInside;/target：处理该事件的对象selector：target需要调用的响应函数event:响应哪种事件事件类型：UIControlEventTouchDown/onalltouchdownsUIControlEventTouchDownRepeat/onmultipletouchdowns(tapcount1)UIControlEventTouchDragInside/内部拖动UIControlEventTouchDragOutside/外部拖动UIControlEventTouchUpInside/手指点击在按钮内抬起UIControlEventTouchUpOutside/手指点击拖动到按钮之外，抬起UIControlEventTouchCancel/系统事件抢占了当前的点击事件，如来电,或者另外手指点击了会退按钮。UIControlEventValueChanged/UISwitchUIControlEventEditingDidBegin/UITextField,添加事件,UIControlEventEditingChangedUIControlEventEditingDidEndUIControlEventEditingDidEndOnExitUIControlEventAllTouchEventsUIControlEventAllEditingEventsUIControlEventApplicationReserved/下面两个系统用UIControlEventSystemReserved,Button使用示例,继承树：UIView:UIResponder:NSObject描述：UIControl封装了触摸类型的接收和消息的分发操作。是UIButton，UISlider，UITextField的父类。讨论内容：UIControl的使用时机UIControl的常见问题,UIControl,通常像到用户点击某个区域响应，对应的点击事件，我们会用到UIButton。但是，UIButton有一些默认的处理比如点击按钮后，按钮会变灰，弹起来时又恢复。如果要做下图的效果？,UIControl的使用时机,在我的秀，消息，好友，我们很显然可以在UIControl上加Label来完成。,UITextField输入焦点没有居中问题：contentVerticalAlignmentcontentHorizontalAlignmentUIControl加到UIScrollView上失效的问题：因为UIControl和UIScrollView都是继承自UIResponder，他们对UIResponder的事件都作了处理，在消息循环中只有一个对象可以处理消息，所以会导致失效，这时可以用UIView来处理。,UIControl常见问题,UISwithandUISlider,创建CGRectframe=CGRectMake(198.0,12.0,94.0,27.0);switchCtl=UISwitchallocinitWithFrame:frame;switchCtladdTarget:selfaction:selector(switchAction:)forControlEvents:UIControlEventValueChanged;switchCtl.backgroundColor=UIColorclearColor;使用-（void）switchAction:(UISwitch*)swif(sw.on)else,UISwitch的创建和使用,创建sliderCtl=UISliderallocinitWithFrame:frame;sliderCtladdTarget:selfaction:selector(sliderAction:)forControlEvents:UIControlEventValueChangedsliderCtl.backgroundColor=UIColorclearColor;sliderCtl.minimumValue=0.0;sliderCtl.maximumValue=100.0;sliderCtl.continuous=YES;sliderCtl.value=50.0;使用-（void）SliderAction:(UISlider*)sObject.alpha=S.value/100.0f;,UISlider的创建和使用,UIActivityIndicatorViewprogressIndstartAnimating;progressInd.activityIndicatorViewStyle=UIActivityIndicatorViewStyleGray;progressIndsizeToFit;,UIActivityIndicatorView,progressBar=UIProgressViewallocinitWithFrame:frame;progressBgressViewStyle=UIProgressViewStyleDefault;progressBgress=0.5;/progress从0.01.0,UIProgressView,UIAlertViewalertshow;alertrelease;UIActionSheet*actionSheet=UIActionSheetallocinitWithTitle:UIActionSheetdelegate:selfcancelButtonTitle:CanceldestructiveButtonTitle:OKotherButtonTitles:nil;actionSheet.actionSheetStyle=UIActionSheetStyleDefault;actionSheetshowInView:self.view;actionSheetrelease;,UIAlertView,UIAlertViewdelegateUIActionSheetDelegate,事件处理,UINavigationBarsegmentedControl.frame=frame;segmentedControl