博主從事iOS開發(fā)3年多,看過許多大神的博客,感覺他們文筆都很好,講解很透徹,但是本人一直沒有寫過博客,今天鼓起勇氣寫下這個入門級的小東西--實用的進度條,想用的盡管拿去.我隨手封裝的東西,如果有可以改進的地方,你又愿意提點我,請留言,謝謝!如果不喜歡,請關閉本文,謝謝!

   好了,廢話不多說,進入主題!

由于目前項目中要用到進度條,但是系統(tǒng)的UIProgressView的高度和背景顏色不一致,想了幾種辦法嘗試解決這個問題,但是感覺有點費勁,然后,然后,我就自己搞了一個,先用著.歡迎留言交流......

上代碼:

LQProgressLine.h

@interface LQProgressLine : UIView
/**
 *  背景色
 */
@property (nonatomic,copy) NSString *backColor;
/**
 *  已經(jīng)經(jīng)過的進度的顏色
 */
@property (nonatomic,copy) NSString *didColor;
/**
 *  進度
 */
@property (nonatomic,assign) CGFloat progress;

/**
 *  工廠方法
 *
 *  @param bColor 背景顏色 (例如"#ffffff")
 *  @param dColor 已經(jīng)經(jīng)過的進度的顏色(例如"#000000")
 *
 *  @return 對象
 */
+(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);  //線寬
  CGContextSetRGBStrokeColor(context, [self.didColorArray[0] floatValue], [self.didColorArray[1] floatValue],   [self.didColorArray[2] floatValue], 1.0);  //線的顏色
  CGContextBeginPath(context);
  CGContextMoveToPoint(context, 0, 0);  //起點坐標
  CGContextAddLineToPoint(context, rect.size.width*_progress, rect.size.height);   //終點坐標
  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,代碼貼完,用法如下:

//創(chuàng)建

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

//在需要設置進度的時候設置
[progressView setProgress:0.4];