iOS自定义视图系列(一)-实用的进度条

博主从事iOS开发3年多,看过许多大神的博客,感觉他们文笔都很好,讲解很透彻,但是本人一直没有写过博客,今天鼓起勇气写下这个入门级的小东西--实用的进度条,想用的尽管拿去.我随手封装的东西,如果有可以改进的地方,你又愿意提点我,请留言,谢谢!如果不喜欢,请关闭本文,谢谢!

   好了,废话不多说,进入主题!

由于目前项目中要用到进度条,但是系统的UIProgressView的高度和背景颜色不一致,想了几种办法尝试解决这个问题,但是感觉有点费劲,然后,然后,我就自己搞了一个,先用着.欢迎留言交流......

上代码:

LQProgressLine.h

@interface LQProgressLine : UIView
/**
 *  背景色
 */
@property (nonatomic,copy) NSString *backColor;
/**
 *  已经经过的进度的颜色
 */
@property (nonatomic,copy) NSString *didColor;
/**
 *  进度
 */
@property (nonatomic,assign) CGFloat progress;

/**
 *  工厂方法
 *
 *  @param bColor 背景颜色 (例如"#ffffff")
 *  @param dColor 已经经过的进度的颜色(例如"#000000")
 *
 *  @return 对象
 */
+(instancetype)progressLineWithBackColor:(NSString *)bColor didColor:(NSString *)dColor;

LQProgressLine.m

#import "LQProgressLine.h"
@interface LQProgressLine ()
@property (nonatomic,strong) NSArray *backColorArray;
@property (nonatomic,strong) NSArray *didColorArray;
@end

@implementation LQProgressLine
+(instancetype)progressLineWithBackColor:(NSString *)bColor didColor:(NSString *)dColor{
    return [[self alloc]initWithBackColor:bColor didColor:dColor];
}
- (instancetype)initWithBackColor:(NSString *)bColor didColor:    (NSString *)dColor{
  if (self = [super init]) {
      self.backColor = bColor;
      self.backgroundColor = [UIColor colorWithRed:[self.backColorArray[0] floatValue] green:[self.backColorArray[1]   floatValue] blue:[self.backColorArray[2] floatValue] alpha:1];
      self.didColor = dColor;
}
  return self;
}
- (void)setBackColor:(NSString *)backColor{
  _backColor = backColor;
  self.backColorArray = [self RGBFromStr:backColor];
  }
- (void)setDidColor:(NSString *)didColor{
  _didColor = didColor;
  self.didColorArray = [self RGBFromStr:didColor];
  }
- (void)drawRect:(CGRect)rect{
  CGContextRef context = UIGraphicsGetCurrentContext();
  CGContextSetLineWidth(context, rect.size.width);  //线宽
  CGContextSetRGBStrokeColor(context, [self.didColorArray[0] floatValue], [self.didColorArray[1] floatValue],   [self.didColorArray[2] floatValue], 1.0);  //线的颜色
  CGContextBeginPath(context);
  CGContextMoveToPoint(context, 0, 0);  //起点坐标
  CGContextAddLineToPoint(context, rect.size.width*_progress, rect.size.height);   //终点坐标
  CGContextStrokePath(context);
}
- (void)setProgress:(CGFloat)progress{
    _progress = progress;
   [self setNeedsDisplay];
}

- (NSArray *)RGBFromStr:(NSString *)hexColor{
  NSString *str = nil;
  if([hexColor rangeOfString:@"#"].length>0){
      str = [hexColor substringFromIndex:1];
  }else{
      str = hexColor;
  }
  if(str.length<=0)return nil;
  unsigned int red, green, blue;
  NSRange range;
  range.length =2;
  range.location =0;
  [[NSScanner scannerWithString:[str substringWithRange:range]]scanHexInt:&red];
  range.location =2;
  [[NSScanner scannerWithString:[str substringWithRange:range]]scanHexInt:&green];
  range.location =4;
  [[NSScanner scannerWithString:[str substringWithRange:range]]scanHexInt:&blue];
  return @[@(red/255.0),@(green/255.0),@(blue/255.0)];
  }

好了,代码贴完,用法如下:

//创建

LQProgressLine*progressView = [LQProgressLine progressLineWithBackColor: @"#cccccc" didColor:@"#0096e0"];
[superView addSubview:progressView];

//在需要设置进度的时候设置
[progressView setProgress:0.4];