自定义一个ProgressView

#import@interface LKProgressView : UIView

@property (nonatomic, assign)CGFloat progress;

@property (nonatomic, strong)UIImageView* backgroundView;

@property (nonatomic, strong)UIImageView* trackImageView;

@end

#import "LKProgressView.h"

@interface LKProgressView()

@property (nonatomic, strong)UIView* innerBg;

@end

@implementation LKProgressView

- (instancetype)init

{

    self = [super init];

    if (self) {

        [self setupSubViews];

    }

    return self;

}

-(void)setupSubViews{

    _backgroundView = [[UIImageView alloc] init];

    [self addSubview:_backgroundView];

    [_backgroundView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.edges.equalTo(self).insets(UIEdgeInsetsZero);

    }];

    UIImage* image = [UIImage imageNamed:@"back_progress"];

    image = [image resizableImageWithCapInsets:UIEdgeInsetsMake(0, 2, 0, 2) resizingMode:UIImageResizingModeTile]; //主要是这个截图最好不需要你去调整截取边缘,我这个还不太标准

    _backgroundView.image = image;

    UIView* innerbgView = [[UIView alloc] init];

    [_backgroundView addSubview:innerbgView];

    [innerbgView mas_makeConstraints:^(MASConstraintMaker *make) {

        make.edges.equalTo(_backgroundView).insets(UIEdgeInsetsMake(2, 2, 2, 2));

    }];

    _trackImageView = [[UIImageView alloc] init];

    [innerbgView addSubview:_trackImageView];

    _innerBg = innerbgView;

    UIImage* track_image = [UIImage imageNamed:@"track_progress"];

    track_image = [track_image resizableImageWithCapInsets:UIEdgeInsetsMake(0, 3, 0, 3) resizingMode:UIImageResizingModeTile];

    _trackImageView.image = track_image;

//    [_trackImageView mas_makeConstraints:^(MASConstraintMaker *make) {

//        make.top.equalTo(_innerBg).offset(0);

//        make.bottom.equalTo(_innerBg).offset(0);

//        make.left.equalTo(_innerBg).offset(0);

//        make.width.mas_equalTo(_innerBg.mas_width).multipliedBy(0.01);

//

//    }];

    _trackImageView.sd_layout.topEqualToView(innerbgView).leftEqualToView(innerbgView).bottomEqualToView(innerbgView).widthRatioToView(innerbgView, 0.01);

    _backgroundView.layer.cornerRadius = 5.0;

    _backgroundView.layer.masksToBounds = YES;

    _innerBg.layer.cornerRadius = 4.0;

    _innerBg.layer.masksToBounds = YES;

}

-(void)setProgress:(CGFloat)progress{

    _progress = progress;

    _trackImageView.sd_resetLayout.topEqualToView(_innerBg).leftEqualToView(_innerBg).bottomEqualToView(_innerBg).widthRatioToView(_innerBg, progress);

//    [_trackImageView layoutSubviews];

//    [_trackImageView mas_updateConstraints:^(MASConstraintMaker *make) {

////        make.top.equalTo(_backgroundView).offset(0);

////        make.bottom.equalTo(_backgroundView).offset(0);

////        make.left.equalTo(_backgroundView).offset(0);

//        make.width.mas_equalTo(_innerBg.mas_width).multipliedBy(progress);

//    }];

    [_innerBg layoutSubviews];

//    [_trackImageView mas_remakeConstraints:^(MASConstraintMaker *make) {

//        make.top.equalTo(_backgroundView).offset(0);

//        make.bottom.equalTo(_backgroundView).offset(0);

//        make.left.equalTo(_backgroundView).offset(0);

//        make.width.mas_equalTo(_backgroundView.mas_width).multipliedBy(progress);

//

//    }];

}

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

    // Drawing code

}

*/

@end