iOS UIProgressView

1:父类

继承于UIView

2: 属性

//进度条的样式, 默认是UIProgressViewStyleDefault,  二者几乎没有什么区别
@property(nonatomic) UIProgressViewStyle progressViewStyle;

进度条的样式是一个枚举
typedef NS_ENUM(NSInteger, UIProgressViewStyle) {
    UIProgressViewStyleDefault,     
    UIProgressViewStyleBar __TVOS_PROHIBITED,     
};

//范围是0.0-1.0, 默认是0.0
@property(nonatomic) float progress;                        

//已加载部分颜色
@property(nonatomic, strong, nullable) UIColor* progressTintColor;

//未加载部分的颜色
@property(nonatomic, strong, nullable) UIColor* trackTintColor;

@property(nonatomic, strong, nullable) UIImage* progressImage;

@property(nonatomic, strong, nullable) UIImage* trackImage;

@property(nonatomic, strong, nullable) NSProgress *observedProgress;

3: 方法

- (instancetype)initWithFrame:(CGRect)frame;

- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder;

//根据样式设置视图高度
- (instancetype)initWithProgressViewStyle:(UIProgressViewStyle)style; 

//设置进度
- (void)setProgress:(float)progress animated:(BOOL)animated;