OC语法

@interfaceViewController()

//标题标签

@property(nonatomic,strong)UILabel*titleLabel;

//左边按钮

@property(nonatomic,strong)UIButton*leftBtn;

//右边按钮

@property(nonatomic,strong)UIButton*rightBtn;

//显示图片

@property(nonatomic,strong)UIImageView*myImageView;

@property(nonatomic,strong)NSArray*imageNames;

@end

@implementationViewController

- (void)viewDidLoad {

[superviewDidLoad];

self.imageNames=@[@"biaoqingdi",@"bingli",@"chiniupa",@"danteng",@"wangba"];

//定义标签位置与名称

self.titleLabel=[[UILabelalloc]initWithFrame:CGRectMake(50,50,150,30)];

self.titleLabel.text=@"biaoqingdi";

[self.viewaddSubview:self.titleLabel];

//定义做按钮的位置

self.leftBtn=[[UIButtonalloc]initWithFrame:CGRectMake(20,150,45,45)];

//关闭交互

self.leftBtn.userInteractionEnabled=NO;

//定义按钮的图片

UIImage*leftImage=[UIImageimageNamed:@"left_disable"];

//设置左按钮的背景图片

[self.leftBtnsetBackgroundImage:leftImageforState:(UIControlStateNormal)];

[self.viewaddSubview:self.leftBtn];

//显示相框名称

self.myImageView= [[UIImageViewalloc]initWithFrame:CGRectMake(85,100,200,200)];

UIImage*image1= [UIImageimageNamed:@"biaoqingdi"];

self.myImageView.image=image1;

//显示相框图片

[self.viewaddSubview:self.myImageView];

//设置右按钮位置

self.rightBtn=[[UIButtonalloc]initWithFrame:CGRectMake(305,150,45,45)];

//设置右按钮图片

UIImage*rightImage=[UIImageimageNamed:@"right_normal"];

//设置右按钮背景图片

[self.rightBtnsetBackgroundImage:rightImageforState:(UIControlStateNormal)];

[self.viewaddSubview:self.rightBtn];

[self.rightBtnaddTarget:selfaction:@selector(rightBtnAction)forControlEvents:(UIControlEventTouchUpInside)];

[self.leftBtnaddTarget:selfaction:@selector(leftBtnAction)forControlEvents:(UIControlEventTouchUpInside)];

}

-(void)leftBtnAction

{

NSUIntegerindex = [self.imageNamesindexOfObject:self.titleLabel.text];

if(index>0){

if(index==1){

self.leftBtn.userInteractionEnabled=NO;

UIImage*image = [UIImageimageNamed:@"left_disable"];

[self.leftBtnsetBackgroundImage:imageforState:(UIControlStateNormal)];

}else{

self.leftBtn.userInteractionEnabled=YES;

self.rightBtn.userInteractionEnabled=YES;

UIImage*leftNormal= [UIImageimageNamed:@"left_normal"];

UIImage*rightNormal=[UIImageimageNamed:@"right_normal"];

[self.leftBtnsetBackgroundImage:leftNormalforState:(UIControlStateNormal)];

[self.rightBtnsetBackgroundImage:rightNormalforState:(UIControlStateNormal)];

}

NSString*preTitle=self.imageNames[index-1];

self.titleLabel.text= preTitle;

self.myImageView.image=[UIImageimageNamed:preTitle];

}

}

-(void)rightBtnAction

{

//切换到下一张图片

//获取当前是第几张图片

NSUIntegerindex = [self.imageNamesindexOfObject:self.titleLabel.text];

//不是为最后一张才切换到下一张

if(index<4){

if(index==3){

//改变右边按钮的颜色和关闭交互

self.rightBtn.userInteractionEnabled=NO;

UIImage*image = [UIImageimageNamed:@"right_disable"];

[self.rightBtnsetBackgroundImage:imageforState:(UIControlStateNormal)];

}else{

//左边按钮和右边按钮都是在一个正常状态

self.leftBtn.userInteractionEnabled=YES;

self.rightBtn.userInteractionEnabled=YES;

UIImage*leftNormal= [UIImageimageNamed:@"left_normal"];

UIImage*rightNormal=[UIImageimageNamed:@"right_normal"];

[self.leftBtnsetBackgroundImage:leftNormalforState:(UIControlStateNormal)];

[self.rightBtnsetBackgroundImage:rightNormalforState:(UIControlStateNormal)];

}

//通过下标访问下一张图片

NSString*nextTitle =self.imageNames[index+1];

self.titleLabel.text= nextTitle;

//根据名称加载图片

self.myImageView.image= [UIImageimageNamed:nextTitle];

}

}

- (void)didReceiveMemoryWarning{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be

recreated.

}

@end