iOS-電池圖標【結合貝塞爾曲線控制電量顯示】

 

基於UIView類：WKJBatteryView

WKJBatteryView.h

#import <UIKit/UIKit.h>

@interface WKJBatteryView : UIView /** value:0 - 100 */
- (void)setBatteryValue:(NSInteger)value; @end

WKJBatteryView.m

#import "WKJBatteryView.h"
@interface WKJBatteryView() ///電池寬度
@property (nonatomic,assign) CGFloat b_width; ///電池高度
@property (nonatomic,assign) CGFloat b_height; ///電池外線寬
@property (nonatomic,assign) CGFloat b_lineW; @property (nonatomic,strong) UIView *batteryView; @end
@implementation WKJBatteryView - (instancetype)initWithFrame:(CGRect)frame{ self = [super initWithFrame:frame]; if (self) { [self drawBattery]; } return self; } ///畫圖標
- (void)drawBattery{ ///x坐標
    CGFloat b_x = 1; ///y坐標
    CGFloat b_y = 1; _b_height = self.bounds.size.height - 2; _b_width = self.bounds.size.width - 5; _b_lineW = 1; //畫電池【左邊電池】
    UIBezierPath *pathLeft = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(b_x, b_y, _b_width, _b_height) cornerRadius:2]; CAShapeLayer *batteryLayer = [CAShapeLayer layer]; batteryLayer.lineWidth = _b_lineW; batteryLayer.strokeColor = [UIColor lightGrayColor].CGColor; batteryLayer.fillColor = [UIColor clearColor].CGColor; batteryLayer.path = [pathLeft CGPath]; [self.layer addSublayer:batteryLayer]; //畫電池【右邊電池箭頭】
    UIBezierPath *pathRight = [UIBezierPath bezierPath]; [pathRight moveToPoint:CGPointMake(b_x + _b_width+1, b_y + _b_height/3)]; [pathRight addLineToPoint:CGPointMake(b_x + _b_width+1, b_y + _b_height * 2/3)]; CAShapeLayer *layerRight = [CAShapeLayer layer]; layerRight.lineWidth = 2; layerRight.strokeColor = [UIColor lightGrayColor].CGColor; layerRight.fillColor = [UIColor clearColor].CGColor; layerRight.path = [pathRight CGPath]; [self.layer addSublayer:layerRight]; ///電池內填充
    _batteryView = [[UIView alloc]initWithFrame:CGRectMake(b_x + 1,b_y + _b_lineW, 0, _b_height - _b_lineW * 2)]; _batteryView.layer.cornerRadius = 2; _batteryView.backgroundColor = [UIColor colorWithRed:0.324 green:0.941 blue:0.413 alpha:1.000]; [self addSubview:_batteryView]; } ///控制電量顯示
- (void)setBatteryValue:(NSInteger)value{ if (value<10) { _batteryView.backgroundColor = [UIColor redColor]; }else{ _batteryView.backgroundColor = [UIColor colorWithRed:0.324 green:0.941 blue:0.413 alpha:1.000]; } CGRect rect = _batteryView.frame; rect.size.width = (value*(_b_width - _b_lineW * 2))/100; _batteryView.frame = rect; } @end

 

封裝好WKJBatteryView后，直接 initWithFrame 實例化引用，然后添加到試圖上就可以了，下面是效果：

 

 

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