小编Dav*_*yan的帖子

这是我的动画方法(PreloaderView.swift)

public func performAction(action: PreloaderAction)
{
    let highOpacity = CABasicAnimation.init(keyPath: "opacity")
    let middleOpacity = CABasicAnimation.init(keyPath: "opacity")
    let lowOpacity = CABasicAnimation.init(keyPath: "opacity")

    if action == .PreloaderActionNone {
        self.thirdShape.removeAllAnimations()
        self.firstShape.opacity = 0.3;
        self.secondShape.opacity = 0.5
        self.thirdShape.opacity = 1.0
    } else if action == .PreloaderActionFailure {
        UIView.animateWithDuration(2, animations: {
            self.thirdShape.strokeColor = UIColor.redColor().CGColor
        }) {(completed : Bool) in
            self.thirdShape.strokeColor = self.ringColor.CGColor
        }

    }

    if action == .PreloaderActionStart {

        highOpacity.fromValue = 0.0
        highOpacity.toValue = 1.0
        highOpacity.duration = animationDuration
        highOpacity.autoreverses = true
        highOpacity.repeatCount = .infinity
        self.secondShape.addAnimation(highOpacity, …

我动态创建UIlabels,对于第一个标签,我使用Bold风格.

for (int i = 0; i < vehicles.count; ++i) {
    CGRect labelRect = CGRectMake(i * (self.frame.size.width / vehicles.count),
                                  3, self.frame.size.width / vehicles.count,
                                  13);
    UILabel *label = [[UILabel alloc] initWithFrame:labelRect];
    label.textColor = thumbColor;
    label.textAlignment = NSTextAlignmentCenter;
    label.text = vehicles[i].vehicleClass;
    UIFont *labelFont;
    if (i == 0) {
        labelFont = [UIFont fontWithName:@"Avenir Next-Bold" size:9.0];
    } else {
        labelFont = [UIFont fontWithName:@"Avenir Next" size:9.0];
    }
    label.font = labelFont;

    [vehiclesLabels addObject:label];
    [self addSubview:label];
}

但它画得像这样

为什么第一个标签更大？