進度條在iOS開發中很常見的，我在項目開發中也寫過好多進度條，有好多種類的，條形，圓形等，今天給大家總結一種條形的開發進度條。系統的進度條UIProgressView

簡單思路：

 1.自定義進度條先繼承UIView 建立一個CustomBarProgressView
 2.在.H文件中外漏的方法《開始的方法》《初始化的方法》
 3.在.M文件中 利用定時器改變位置 實現進度條

#######效果圖

1.gif

#######部分代碼

-(instancetype)initWithFrame:(CGRect)frame withStartNum:(CGFloat)startNum withEndNum:(CGFloat)endNum withSignNum:(CGFloat)signNum withTime:(CGFloat)time{
    if (self = [super initWithFrame:frame]) {

        self.startNum =  startNum;
        self.endNum = endNum;
        self.signNum = signNum;
        
        if(time == 0){
            self.time  = 0.1;
        }else{
            self.time = time;
        }
     
        [self setUpSubViews];
    }
    return self;
}

- (void)setUpSubViews
{
    UIView *backView = [[UIView alloc] init];
    backView.backgroundColor =BoomViewColor;
    backView.layer.cornerRadius = CornerRadius;
    backView.layer.masksToBounds = YES;
    [self addSubview:backView];
    self.backView = backView;
    
    UIView *fontView = [[UIView alloc] init];
    fontView.backgroundColor = UpViewColor;
    fontView.layer.cornerRadius = CornerRadius;
    fontView.layer.masksToBounds = YES;
    [self addSubview:fontView];
    self.fontView = fontView;

}

-(void)progressViewStart{
    if (self.timer == nil) {
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            self.timer = [NSTimer scheduledTimerWithTimeInterval:self.time target:self selector:@selector(changeProgressViewFrame:) userInfo:nil repeats:YES];
            [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
        });
        
    }
}

-(void)changeProgressViewFrame:(NSTimer *)timer{
    
    //位置計算
    CGFloat signProgress = (self.signNum - self.startNum) / (self.endNum - self.startNum);
   NSLog(@"==>>>%f",self.progress);
    if (self.progress >= signProgress){
        [self.timer invalidate];
        self.timer = nil;
        return;
    }
    
    self.progress += 0.01;
    [self setNeedsLayout];
    
}

-(void)layoutSubviews{
    [super layoutSubviews];
    NSLog(@"==>>>%f",self.progress);
    self.backView.frame = self.bounds;
    self.fontView.frame = self.bounds;
    self.fontView.width =  self.width * self.progress;
    
}

PS:可以自己增加 進度條文字等修改大小 樣式

別小看任何人，越不起眼的人。往往會做些讓人想不到的事。。。
2016年09月26日 未完待續。。。需要Demo留下郵箱。。后續傳GitHub