app中很多地方用到了單實線，有的是橫著的，有的是豎著的，偷懶的時候直接用UIView，設置背景色就搞定了。。。不過，心里很是不安&不爽。下邊就上代碼了。

　　SingleLineView.h

1 #import <UIKit/UIKit.h> 2 3 // 單實線方向 4 typedef enum { 5 // 橫向 6 SingleLineOrientationVertical, 7 // 縱向 8 SingleLineOrientationHorizontal 9 } SingleLineOrientation; 10 11 @interface SingleLineView : UIView { 12 CGFloat _lineWidth; 13 UIColor *_lineColor; 14 SingleLineOrientation _lineOrientation; 15 } 16 17 // 單實線寬度 18 @property (nonatomic) CGFloat lineWidth; 19 // 單實線顏色 20 @property (nonatomic, strong) UIColor *lineColor; 21 // 單實線方向 22 @property (nonatomic) SingleLineOrientation lineOrientation; 23 24 @end

　　SingleLineView.m

1 #import "SingleLineView.h" 2 3 @implementation SingleLineView 4 5 - (instancetype)init { 6 self = [super init]; 7 8 // 默認情況下單實線樣式 9 if (self) { 10 [self setLineWidth:0.5]; 11 [self setLineColor:[UIColor grayColor]]; 12 [self setLineOrientation:SingleLineOrientationHorizontal]; 13 [self setBackgroundColor:[UIColor clearColor]]; 14 } 15 16 return self; 17 } 18 19 // Only override drawRect: if you perform custom drawing. 20 // An empty implementation adversely affects performance during animation. 21 - (void)drawRect:(CGRect)rect { 22 CGContextRef context = UIGraphicsGetCurrentContext(); 23 CGContextSetLineCap(context, kCGLineCapRound); 24 CGContextSetLineWidth(context, self.lineWidth); 25 CGContextSetAllowsAntialiasing(context, YES); 26 CGContextSetStrokeColorWithColor(context, self.lineColor.CGColor); 27 CGContextBeginPath(context); 28 29 CGContextMoveToPoint(context, 0, 0); 30 if (self.lineOrientation == SingleLineOrientationHorizontal) { 31 CGContextAddLineToPoint(context, self.frame.size.width, 0); 32 } else { 33 CGContextAddLineToPoint(context, 0, self.frame.size.height); 34 } 35 36 CGContextStrokePath(context); 37 } 38 39 #pragma mark - getters && setters 40 41 - (CGFloat)lineWidth { 42 return _lineWidth; 43 } 44 45 - (void)setLineWidth:(CGFloat)lineWidth { 46 _lineWidth = lineWidth; 47 [self setNeedsDisplay]; 48 } 49 50 - (UIColor *)lineColor { 51 return _lineColor; 52 } 53 54 - (void)setLineColor:(UIColor *)lineColor { 55 _lineColor = lineColor; 56 [self setNeedsDisplay]; 57 } 58 59 - (SingleLineOrientation)lineOrientation { 60 return _lineOrientation; 61 } 62 63 - (void)setLineOrientation:(SingleLineOrientation)lineOrientation { 64 _lineOrientation = lineOrientation; 65 } 66 67 @end

　　使用方法：

self.singleLineTest = [[SingleLineView alloc] init]; //[self.singleLineTest setLineOrientation:SingleLineOrientationVertical]; [self.view addSubview:self.singleLineTest];[self.singleLineTest mas_makeConstraints:^(MASConstraintMaker *make) {make.left.equalTo(self.view).with.offset(50);make.right.equalTo(self.view).with.offset(-50);make.top.equalTo(self.view).with.offset(200);make.height.mas_equalTo(1);}];

　　以上。

轉載于:https://www.cnblogs.com/zpz501/p/5147665.html

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