jiayoufang / Kits

做一个类似Android吐司控件的一个提示框

JYToast

做一个类似Android吐司控件的一个提示框

####提供两种初始化方法 - (id)initWithText:(NSString *)text;

+ (id)toastWithText:(NSString *)text;

####提供两种展示方式 - (void)show;//Default is JYToastShowTypeBottom

- (void)showType:(JYToastShowType)type;

####主要学习

• UILabel的文字设置（主要是这两个方法的使用）

    - (void)drawTextInRect:(CGRect)rect
    {
    [super drawTextInRect:UIEdgeInsetsInsetRect(rect, self.textInsets)];
    }
  
    - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines
    {
        bounds.size = [self.text boundingRectWithSize:CGSizeMake(self.maxWidth - self.textInsets.left - self.textInsets.right, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.font} context:nil].size;
        return bounds;
    }
  

• layer层添加动画的一种方式

    - (void)addAnimationGroup
    {
     CABasicAnimation *forwardAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    forwardAnimation.duration = self.forwardAnimationDuration;
    forwardAnimation.timingFunction = [CAMediaTimingFunction functionWithControlPoints:0.5f :1.7f :0.6f :0.85f];
    forwardAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
    forwardAnimation.toValue = [NSNumber numberWithFloat:1.0f];
  
    CABasicAnimation *backwardAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    backwardAnimation.duration = self.backwardAnimationDuration;
    backwardAnimation.beginTime = forwardAnimation.duration + kDefautlWaitAnimationDuration;
    backwardAnimation.timingFunction = [CAMediaTimingFunction functionWithControlPoints:0.4f :0.15f :0.5f :-0.7f];
    backwardAnimation.fromValue = [NSNumber numberWithFloat:1.0f];
    backwardAnimation.toValue = [NSNumber numberWithFloat:0.0f];
    
    CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
    animationGroup.animations = @[forwardAnimation,backwardAnimation];
    animationGroup.duration = forwardAnimation.duration + backwardAnimation.duration + kDefautlWaitAnimationDuration;
    animationGroup.removedOnCompletion = NO;
    animationGroup.delegate = self;
    animationGroup.fillMode = kCAFillModeForwards;
  
    [self.layer addAnimation:animationGroup forKey:@"customShow"];
    }
    //回调
    - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
    {
    if (flag) {
    [self removeFromSuperview];
    //动画结束时从layer层移除动画，否则，会内存泄露。
    [self.layer removeAnimationForKey:@"customShow"];
    }
    }