127 lines
3.3 KiB
Objective-C
127 lines
3.3 KiB
Objective-C
//
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// LBXScanVideoZoomView.m
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// testSlider
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//
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//
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#import "LBXScanVideoZoomView.h"
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@interface LBXScanVideoZoomView()
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@property (nonatomic, strong) UISlider *slider;
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@end
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@implementation LBXScanVideoZoomView
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// Only override drawRect: if you perform custom drawing.
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// An empty implementation adversely affects performance during animation.
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- (void)drawRect:(CGRect)rect
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{
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// Drawing code
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UIColor *colorLine = [UIColor whiteColor];
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CGColorRef color = colorLine.CGColor;
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CGContextRef ctx = UIGraphicsGetCurrentContext();
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CGContextSetStrokeColorWithColor(ctx, color);
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CGContextSetLineWidth(ctx, 2.0);
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CGFloat borderDiff = 20;
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CGFloat w = borderDiff/2;
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CGFloat diff = 5;
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//左边减号
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CGContextMoveToPoint(ctx, diff, CGRectGetHeight(self.frame)/2);
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CGContextAddLineToPoint(ctx, diff + w, CGRectGetHeight(self.frame)/2);
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//右边加号
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//横
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CGFloat rx = CGRectGetWidth(self.frame) - borderDiff + diff;
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CGContextMoveToPoint(ctx, rx, CGRectGetHeight(self.frame)/2);
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CGContextAddLineToPoint(ctx, rx + w, CGRectGetHeight(self.frame)/2);
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//竖
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CGFloat hDiff = CGRectGetHeight(self.frame)/2 - w/2;
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CGContextMoveToPoint(ctx, rx+w/2 , hDiff);
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CGContextAddLineToPoint(ctx, rx+w/2, CGRectGetHeight(self.frame)-hDiff);
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CGContextStrokePath(ctx);
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}
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- (UIImage *) toImage:(UIColor*)color size:(CGSize)size
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{
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CGRect rect=CGRectMake(0.0f, 0.0f, size.width, size.height);
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UIGraphicsBeginImageContext(rect.size);
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextSetFillColorWithColor(context, [color CGColor]);
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CGContextFillRect(context, rect);
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UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return theImage;
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}
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- (id)initWithFrame:(CGRect)frame
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{
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if (self = [super initWithFrame:frame]) {
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}
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self.backgroundColor = [UIColor colorWithRed:10 green:10 blue:10 alpha:0.2];
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[self.slider setThumbImage:[self toImage:[UIColor whiteColor] size:CGSizeMake(3, 12)] forState:UIControlStateNormal];
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self.slider.minimumTrackTintColor = [UIColor whiteColor];
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self.slider.maximumTrackTintColor = [UIColor colorWithRed:146/255.0 green:146/255.0 blue:146/255.0 alpha:1.0];
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[self.slider addTarget:self action:@selector(sliderValueChange) forControlEvents:UIControlEventValueChanged];
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self.layer.masksToBounds = YES;
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self.layer.cornerRadius = 8.0;
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return self;
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}
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- (void)sliderValueChange
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{
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NSLog(@"%f",self.slider.value);
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if (_block) {
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_block(self.slider.value);
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}
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}
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//- (void)addTarget:(nullable id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;
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- (UISlider*)slider
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{
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if (!_slider) {
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_slider = [[UISlider alloc]init];
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[self addSubview:_slider];
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_slider.minimumValue = 1.0;
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_slider.maximumValue = 50.0;
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}
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return _slider;
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}
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- (void)setMaximunValue:(CGFloat)value
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{
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self.slider.maximumValue = value;
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}
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- (void)layoutSubviews
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{
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[super layoutSubviews];
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CGFloat borderDiff = 20;
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_slider.bounds = CGRectMake(0, 0, CGRectGetWidth(self.frame)-borderDiff*2, CGRectGetHeight(self.frame));
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_slider.center = CGPointMake(CGRectGetWidth(self.frame)/2, CGRectGetHeight(self.frame)/2);
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}
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@end
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