IOS开发基础知识--碎片29

1:心跳效果，并可去除心跳

- (void)initScaleLayer

{

    self.view.backgroundColor=[UIColor blueColor];

    UIButton *myTelButtom=[[UIButton alloc]initWithFrame: CGRectMake(, , , )];

    UIImage *btnTelImage=[UIImage imageNamed:@"customer_tel_icon"];

    [myTelButtom setBackgroundImage:btnTelImage forState:UIControlStateNormal];

    [myTelButtom setBackgroundImage:[UIImage imageNamed:@"customer_tel_icon"] forState:UIControlStateHighlighted];

    [myTelButtom addTarget:self action:@selector(btnSave:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:myTelButtom];

    //设定剧本

    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];

    scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];

    scaleAnimation.toValue = [NSNumber numberWithFloat:1.2];

    scaleAnimation.autoreverses = YES;

    scaleAnimation.fillMode = kCAFillModeForwards;

    scaleAnimation.repeatCount = MAXFLOAT;

    scaleAnimation.duration = 0.8;

    //开演

    [myTelButtom.layer addAnimation:scaleAnimation forKey:@"scaleAnimation"];

}

-(void)btnSave:(id)sender

{

    UIButton *btn=(UIButton *)sender;

    [btn.layer removeAnimationForKey:@"scaleAnimation"];

}

2:启动动画效果实现

原理：启动页同样是放一张静态图，只是在启动时再创建一个图片视图把一张跟启动页的图片做动画；如下：

@interface AppDelegate ()

@property (strong,nonatomic) UIImageView *niceView;

@end

@implementation AppDelegate

@synthesize niceView;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    self.window.rootViewController = [[ViewController alloc]init];;

    [self.window makeKeyAndVisible];

    //圖片擴大淡出的效果开始;

    //设置一个图片;

    niceView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].bounds];

    niceView.tag=;

    niceView.image = [UIImage imageNamed:@"launch4.7.png"];

    //添加到场景

    [self.window addSubview:niceView];

    //放到最顶层;

    [self.window bringSubviewToFront:niceView];

    CABasicAnimation *animation=[CABasicAnimation animationWithKeyPath:@"transform.scale"];

    niceView.layer.anchorPoint = CGPointMake(.,.);

    animation.fromValue = @1.0f;

    animation.toValue = @1.3f;

    animation.fillMode=kCAFillModeForwards;

    animation.removedOnCompletion = NO;

    [animation setAutoreverses:NO];

    //动画时间

    animation.duration=0.9;

    animation.delegate=self;

    [niceView.layer addAnimation:animation forKey:@"scale"];

    //结束;

    return YES;

}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag

{

    [niceView removeFromSuperview];

}

3：计算标签的宽度并计算是否换行显示

-(void)creatUI:(NSMutableArray *)tagArr{

    self.tagArr = [NSMutableArray arrayWithArray:[tagArr mutableCopy]];

    if (self.is_can_addTag) {//如果可以添加标签，那么数组就多一个添加标签按钮

        [self.tagArr addObject:self.addTagStr.length>?self.addTagStr:@"添加标签"];

    }

    tagView_height = ;

    self.backgroundColor = self.tagViewBackgroundColor?self.tagViewBackgroundColor:[UIColor whiteColor];

    previousFrame = CGRectZero;

    [self.tagArr enumerateObjectsUsingBlock:^(id value, NSUInteger idx, BOOL *stop) {

        //Tag标题（看传入的是字典还是字符串）

        NSMutableString *titleStr = [NSMutableString stringWithString:self.tagStateType==?@"  ":@""];

        if ([value isKindOfClass:[NSString class]]) {

            [titleStr appendString:value];

        }else if([value isKindOfClass:[NSDictionary class]]){

            if (!self.tagArrkey) {

                //获取不到Value，因为没传入Key

                NSLog(@"获取不到Value，因为没传入Key");

                return ;

            }

            [titleStr appendString:[value valueForKey:self.tagArrkey]];

        }

        //创建Label

        UILabel*tagLabel = [[UILabel alloc]initWithFrame:CGRectZero];

        [self creatTagUI:tagLabel];

        tagLabel.text = titleStr;

        tagLabel.tag = KTapLabelTag+idx;

        //计算label的大小

        NSDictionary *attrs = @{NSFontAttributeName : [UIFont systemFontOfSize:self.tagFont?self.tagFont:KTagFont]};

        CGSize Size_str = [titleStr sizeWithAttributes:attrs];

        Size_str.width += K_Tag_Title_H_Marin*;

        Size_str.height += K_Tag_Title_V_Marin*;

        CGRect newRect = CGRectZero;

        if (previousFrame.origin.x + previousFrame.size.width + Size_str.width + K_Tag_Right_Margin > JF_Screen_Width) {

            newRect.origin = CGPointMake(, previousFrame.origin.y + Size_str.height + K_Tag_Bottom_Margin);

            tagView_height += Size_str.height + K_Tag_Bottom_Margin;

        }

        else {

            newRect.origin = CGPointMake(previousFrame.origin.x + previousFrame.size.width + K_Tag_Right_Margin, previousFrame.origin.y);

        }

        newRect.size = Size_str;

        [tagLabel setFrame:newRect];

        previousFrame=tagLabel.frame;

        //改变控件高度

        if (idx==self.tagArr.count-) {

            [self setHight:self andHight:tagView_height+Size_str.height + K_Tag_Bottom_Margin];

        }

        [self addSubview:tagLabel];

        //新增删除、添加功能

        if (self.is_can_addTag&&idx==self.tagArr.count-) {//能添加状态&&最后一个-->(进入添加tag界面不用显示删除图片)

        }else{

            if (self.tagStateType==) {

                //移除的图片

                UIImageView *removeImage = [[UIImageView alloc] initWithFrame:CGRectMake(tagLabel.jf_right-Image_Width*1.5, tagLabel.jf_top+(tagLabel.jf_height-Image_Height)/, Image_Width, Image_Height)];

                //删除图片可以换成自己的图片

                removeImage.image = [UIImage imageNamed:@"btn_removeTag"];

                [self addSubview:removeImage];

            }

        }

        //点击按钮

        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(tagLabel.frame.origin.x, tagLabel.frame.origin.y, tagLabel.frame.size.width, tagLabel.frame.size.height)];

        [button setTag:KButtonTag+idx];

        [button addTarget:self action:@selector(clickTag:) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:button];

    }];

}