quzed2D进度条

#import "progressBar.h"

@interface progressBar ()

@property (nonatomic,
weak) IBOutlet UISlider *progressSlider;

@property (nonatomic,
weak) IBOutlet UILabel *showValue;

@end

@implementation progressBar

- (void)awakeFromNib

{

    

    [self.progressSlider addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];

    self.progressSlider.value =
0;

}

- (void)valueChange:(UISlider *)slider

{

    self.showValue.text = [NSString stringWithFormat:@"%.2f%%",slider.value *
100.0];

    [self setNeedsDisplay];

}

- (void)drawRect:(CGRect)rect {

   

//   描述路径

    CGPoint center = CGPointMake(self.bounds.size.width *0.5,
self.bounds.size.height *
0.5);

    CGFloat radius = self.bounds.size.width *
0.5 - 10;

    CGFloat startA = 0;

    CGFloat endA = self.progressSlider.value * M_PI *
2;

    NSLog(@"endA = %f",endA);

    NSLog(@"self.progressSlider.value = %f",self.progressSlider.value);

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];

    [path stroke];

    

}

@end