IOS學習筆記(十)之UIImageView圖檔視圖的基本概念和使用方法

 IOS學習筆記(十)之UIImageView圖檔視圖的基本概念和使用方法

     Author:hmjiangqq

     Email:[email protected]

UIImageView:

作用:專門用于顯示圖檔

首先看下官方的解說:

 An p_w_picpath view object provides a view-based container for displaying either a single p_w_picpath or for animating a series of p_w_picpaths. For animating the p_w_picpaths, the

UIImageView

class   provides controls to set the duration and frequency of the animation. You can also start and stop the animation freely.

 When a

UIImageView

object displays one of its p_w_picpaths, the actual behavior is based on the properties of the p_w_picpath and the view. If either of the p_w_picpath’s

leftCapWidth

or

topCapHeight

properties   are non-zero, then the p_w_picpath is stretched according to the values in those properties. Otherwise, the p_w_picpath is scaled, sized to fit, or positioned in the p_w_picpath view according to the

contentMode

property   of the view. It is recommended (but not required) that you use p_w_picpaths that are all the same size. If the p_w_picpaths are different sizes, each will be adjusted to fit separately based on that mode.

 All p_w_picpaths associated with a

UIImageView

object should use the same

scale

.   If your application uses p_w_picpaths with different scales, they may render incorrectly.

常用屬性和方法：

執行個體代碼:

//建立圖檔視圖
//建立圖檔視圖
UIImageView *p_w_picpathview=[[UIImageView  alloc]initWithFrame:CGRectMake(140, 100, 45, 45)];
//設定高亮
p_w_picpathview.highlighted=YES;
//設定圖檔
p_w_picpathview.p_w_picpath=[UIImage p_w_picpathNamed:@"notification_icon"];
//設定高亮圖檔
p_w_picpathview.highlightedImage=[UIImage p_w_picpathNamed:@"notification_icon"];
[self.window addSubview:p_w_picpathview];      

- (id)initWithImage:(UIImage *)p_w_picpath;    //初始化一張圖檔
- (id)initWithImage:(UIImage *)p_w_picpath highlightedImage:(UIImage *)highlightedImage NS_AVAILABLE_IOS(3_0);
//初始化 加入一張高亮圖檔與本身圖檔
//預設圖檔
@property(nonatomic,retain) UIImage *p_w_picpath;                                                     // default is nil
//高亮圖檔
@property(nonatomic,retain) UIImage *highlightedImage NS_AVAILABLE_IOS(3_0);      // default is nil
@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;               // default is NO
//設定為YES 使用者才可以進行點選
//設定為YES 圖檔高亮顯示
@property(nonatomic,getter=isHighlighted) BOOL highlighted NS_AVAILABLE_IOS(3_0); // default is NO