实现一个view从顶部移到底部的动画 and 将RGB值转化为颜色

来源：互联网发布：2017淘宝店铺排名编辑：程序博客网时间：2024/05/19 18:15

@interface TimingCurveViewController : UIViewController {
IBOutlet UIImageView *basketBall;
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

[UIView beginAnimations:@"movement" context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; //<label id="code.timingcurve.easeIn"/>
[UIView setAnimationDuration:1.0f];
[UIView setAnimationRepeatCount:3];
[UIView setAnimationRepeatAutoreverses:YES];
CGPoint center = basketBall.center;
if(center.y > 85.0f) {
    center.y -= 295.0f;
    basketBall.center = center;
} else {
    center.y += 295.0f;
    basketBall.center = center;
}
[UIView commitAnimations];

}

- (void)viewDidLoad{
[super viewDidLoad];
self.view.backgroundColor = [self colorWithRGBHexString:@"#abcdef"];
}

- (UIColor *)colorWithRGBHexString:(NSString *)rgbColor{
    NSString *cString = rgbColor;

    //去除空格并大写NSCharacterSetwhitespaceAndNewlineCharacterSet

    cString = [[cString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];

    if ([cString length] < 6) {

        //返回默认颜色

        return [UIColor redColor];

    }

    if ([cString hasPrefix:@"0x"]) {

        cString = [cString substringFromIndex:2];

    }else if ([cString hasPrefix:@"#"]){

        cString = [cString substringFromIndex:1];

    }

    if ([cString length] != 6) {

        //返回默认颜色

        return [UIColor redColor];

    }

    NSRange range;

    range.length = 2;

    range.location = 0;

    NSString *rString = [cString substringWithRange:range];

    range.location = 2;

    NSString *gString = [cString substringWithRange:range];

    range.location = 4;

    NSString *bString = [cString substringWithRange:range];



    unsigned int r,g,b;

    [[NSScanner scannerWithString:rString] scanHexInt:&r];

    [[NSScanner scannerWithString:gString] scanHexInt:&g];

    [[NSScanner scannerWithString:bString] scanHexInt:&b];



    return [UIColor colorWithRed:(float)r/255.0 green:(float)g/255.0 blue:(float)b/255.0 alpha:1.0f];
}