iPhone装饰音频录音 [英] iPhone trim audio recording
本文介绍了iPhone装饰音频录音的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的应用程序中有一个语音备忘录组件，我想允许用户修剪音频，类似于QuickTime X在Mac OS十点六处理它，或像iPhone上的语音备忘录应用程序。这里有两个例子：
任何帮助是赞赏。
解决方案
我不是一个UI程序员。这是我写的一个测试，看看如何编写自定义控件。此代码可能会或可能不工作。
@ interface SUIMaxSlider：UIControl {
@private
float_t minimumValue;
float_t maximumValue;
float_t value;
CGPoint trackPoint;
}
@property（nonatomic，assign）float_t minimumValue，maximumValue;
@property（nonatomic，assign）float_t value;
@end
实施
#importSUIMaxSlider.h
#import< CoreGraphics / CoreGraphics.h>
#import< QuartzCore / QuartzCore.h>
//＃importCommon.h
#define kSliderPadding 5
@implementation SUIMaxSlider
@synthesize minimumValue，maximumValue;
#pragma mark -
#pragma mark接口初始化
- （id）initWithCoder：（NSCoder *）aDecoder {
if（self = [ super initWithCoder：aDecoder]）{
trackPoint.x = self.bounds.size.width;
self.backgroundColor = [UIColor colorWithRed：135.0 / 255.0 green：173.0 / 255.0 blue：255.0 / 255.0 alpha：0.0];
}
return self;
}
- （id）initWithFrame：（CGRect）aFrame {
if（self = [super initWithFrame：aFrame]）{
self.frame = aFrame;
self.bounds = aFrame;
self.center = CGPointMake（CGRectGetMidX（aFrame），CGRectGetMidY（aFrame））;
trackPoint.x = aFrame.size.width;
}
return self;
}
- （id）init {
return [self initWithFrame：CGRectZero];
}
#pragma mark -
#pragma mark属性。
#pragma mark -
- （float_t）value {
返回值;
}
- （void）setValue：（float_t）v {
value = fmin（v，maximumValue）;
value = fmax（value，minimumValue）;
float_t delta = maximumValue - minimumValue;
float_t scalar =（（self.bounds.size.width - 2 * kSliderPadding）/ delta）;
float_t x =（value - minimumValue）* scalar;
x + = 5.0;
trackPoint.x = x;
[self setNeedsDisplay];
}
#pragma mark -
#pragma mark界面图
#pragma mark -
- （void） drawRect：（CGRect）rect {
CGContextRef context = UIGraphicsGetCurrentContext（）;
CGColorRef lightBlue = [UIColor colorWithRed：135.0 / 255.0 green：173.0 / 255.0 blue：255.0 / 255.0 alpha：1.0] .CGColor;
CGColorRef lightBlueAlpha = [UIColor colorWithRed：135.0 / 255.0 green：173.0 / 255.0 blue：255.0 / 255.0 alpha：0.7] .CGColor;
CGColorRef lightGrayColor = [UIColor colorWithRed：130.0 / 255.0 green：130.0 / 255.0 blue：130.0 / 255.0 alpha：1.0] .CGColor;
CGColorRef darkGrayColor = [UIColor colorWithRed：70.0 / 255.0 green：70.0 / 255.0 blue：70.0 / 255.0 alpha：1.0] .CGColor;
CGColorRef redColor = [UIColor colorWithRed：1.0 green：1.0 blue：1.0 alpha：0.6] .CGColor;
CGRect boundsRect = self.bounds;
CGRect sliderRect = CGRectMake（0，0，boundsRect.size.width，boundsRect.size.height / 2）;
/ *
CGContextSetFillColorWithColor（context，lightGrayColor）;
CGContextFillRect（context，sliderRect）;
halfHeight.origin.y = sliderRect.size.height;
CGContextSetFillColorWithColor（context，darkGrayColor）;
CGContextFillRect（context，sliderRect）;
* /
CGFloat tx = fmin（sliderRect.size.width - kSliderPadding，trackPoint.x）;
tx = fmax（kSliderPadding，tx）;
sliderRect.origin.y = boundsRect.origin.y;
sliderRect.size.width = tx;
CGContextSetFillColorWithColor（context，lightBlueAlpha）;
CGContextFillRect（context，sliderRect）;
sliderRect.origin.y = sliderRect.size.height;
CGContextSetFillColorWithColor（context，lightBlue）;
CGContextFillRect（context，sliderRect）;
CGFloat mid = boundsRect.size.height / 2;
CGPoint a = CGPointMake（tx - kSliderPadding，mid）;
CGPoint b = CGPointMake（tx，mid - kSliderPadding）;
CGPoint c = CGPointMake（tx + kSliderPadding，mid）;
CGPoint d = CGPointMake（tx，mid + kSliderPadding）;
CGContextSetRGBFillColor（context，1.0，1.0，1.0，1.0）;
CGContextSetLineWidth（context，2.0）;
CGContextBeginPath（context）;
CGContextMoveToPoint（context，a.x，a.y）;
CGContextAddLineToPoint（context，b.x，b.y）;
CGContextAddLineToPoint（context，c.x，c.y）;
CGContextAddLineToPoint（context，d.x，d.y）;
CGContextAddLineToPoint（context，a.x，a.y）;
CGContextFillPath（context）;
}
#pragma mark -
#pragma mark触摸跟踪
#pragma mark -
- （void） trackTouch：（UITouch *）touch {
CGPoint p = [touch locationInView：self];
// bound track point
trackPoint.x = fmax（p.x，kSliderPadding）;
trackPoint.x = fmin（trackPoint.x，self.bounds.size.width - kSliderPadding）;
[self setNeedsDisplay];
float_t x = trackPoint.x - kSliderPadding;
float_t delta = maximumValue - leastValue;
float_t scalar =（x /（self.bounds.size.width - 2 * kSliderPadding））;
value = minimumValue +（delta * scalar）;
[self sendActionsForControlEvents：UIControlEventValueChanged];
}
- （void）endTrackingWithTouch：（UITouch *）touch withEvent：（UIEvent *）event {
[self trackTouch：touch];
}
- （BOOL）beginTrackingWithTouch：（UITouch *）touch withEvent：（UIEvent *）event {
CGPoint p = [touch locationInView：self];
trackPoint.x = fmax（p.x，kSliderPadding）;
trackPoint.x = fmin（trackPoint.x，self.bounds.size.width - kSliderPadding）;
[self setNeedsDisplay];
return YES;
}
- （BOOL）continueTrackingWithTouch：（UITouch *）touch withEvent：（UIEvent *）event {
[self trackTouch：touch];
return YES;
}
@end
I have a voice memo component in my app, and I want to allow the user to trim the audio, similar to QuickTime X on Mac OS Ten point Six handles it, or like the Voice Memos app on the iPhone. Here's an example of both:
Any help is appreciated.
解决方案
I am not a UI programmer by any means. This was a test I wrote to see how to write custom controls. This code may or may not work. I have not touched it in some time.
header
@interface SUIMaxSlider : UIControl {
@private
float_t minimumValue;
float_t maximumValue;
float_t value;
CGPoint trackPoint;
}
@property (nonatomic, assign) float_t minimumValue, maximumValue;
@property (nonatomic, assign) float_t value;
@end
implementation
#import "SUIMaxSlider.h"
#import <CoreGraphics/CoreGraphics.h>
#import <QuartzCore/QuartzCore.h>
//#import "Common.h"
#define kSliderPadding 5
@implementation SUIMaxSlider
@synthesize minimumValue, maximumValue;
#pragma mark -
#pragma mark Interface Initialization
- (id) initWithCoder:(NSCoder *)aDecoder {
if (self = [super initWithCoder:aDecoder]) {
trackPoint.x = self.bounds.size.width;
self.backgroundColor = [UIColor colorWithRed:135.0/255.0 green:173.0/255.0 blue:255.0/255.0 alpha:0.0];
}
return self;
}
- (id) initWithFrame: (CGRect) aFrame {
if (self = [super initWithFrame:aFrame]) {
self.frame = aFrame;
self.bounds = aFrame;
self.center = CGPointMake(CGRectGetMidX(aFrame), CGRectGetMidY(aFrame));
trackPoint.x = aFrame.size.width;
}
return self;
}
- (id) init {
return [self initWithFrame:CGRectZero];
}
#pragma mark -
#pragma mark Properties.
#pragma mark -
- (float_t) value {
return value;
}
- (void) setValue:(float_t) v {
value = fmin(v, maximumValue);
value = fmax(value, minimumValue);
float_t delta = maximumValue - minimumValue;
float_t scalar = ((self.bounds.size.width - 2 * kSliderPadding) / delta) ;
float_t x = (value - minimumValue) * scalar;
x += 5.0;
trackPoint.x = x;
[self setNeedsDisplay];
}
#pragma mark -
#pragma mark Interface Drawing
#pragma mark -
- (void) drawRect:(CGRect) rect {
CGContextRef context = UIGraphicsGetCurrentContext();
CGColorRef lightBlue = [UIColor colorWithRed:135.0/255.0 green:173.0/255.0 blue:255.0/255.0 alpha:1.0].CGColor;
CGColorRef lightBlueAlpha = [UIColor colorWithRed:135.0/255.0 green:173.0/255.0 blue:255.0/255.0 alpha:0.7].CGColor;
CGColorRef lightGrayColor = [UIColor colorWithRed:130.0/255.0 green:130.0/255.0 blue:130.0/255.0 alpha:1.0].CGColor;
CGColorRef darkGrayColor = [UIColor colorWithRed:70.0/255.0 green:70.0/255.0 blue:70.0/255.0 alpha:1.0].CGColor;
CGColorRef redColor = [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.6].CGColor;
CGRect boundsRect = self.bounds;
CGRect sliderRect = CGRectMake(0, 0, boundsRect.size.width, boundsRect.size.height / 2);
/*
CGContextSetFillColorWithColor(context, lightGrayColor);
CGContextFillRect(context, sliderRect);
halfHeight.origin.y = sliderRect.size.height;
CGContextSetFillColorWithColor(context, darkGrayColor);
CGContextFillRect(context, sliderRect);
*/
CGFloat tx = fmin(sliderRect.size.width - kSliderPadding, trackPoint.x);
tx = fmax(kSliderPadding, tx);
sliderRect.origin.y = boundsRect.origin.y;
sliderRect.size.width = tx ;
CGContextSetFillColorWithColor(context, lightBlueAlpha);
CGContextFillRect(context, sliderRect);
sliderRect.origin.y = sliderRect.size.height;
CGContextSetFillColorWithColor(context, lightBlue);
CGContextFillRect(context, sliderRect);
CGFloat mid = boundsRect.size.height / 2 ;
CGPoint a = CGPointMake(tx - kSliderPadding, mid);
CGPoint b = CGPointMake(tx, mid - kSliderPadding);
CGPoint c = CGPointMake(tx + kSliderPadding, mid);
CGPoint d = CGPointMake(tx, mid + kSliderPadding);
CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0);
CGContextSetLineWidth(context, 2.0);
CGContextBeginPath(context);
CGContextMoveToPoint(context, a.x, a.y);
CGContextAddLineToPoint(context, b.x, b.y);
CGContextAddLineToPoint(context, c.x, c.y);
CGContextAddLineToPoint(context, d.x, d.y);
CGContextAddLineToPoint(context, a.x, a.y);
CGContextFillPath(context);
}
#pragma mark -
#pragma mark Touch Tracking
#pragma mark -
- (void) trackTouch:(UITouch *) touch {
CGPoint p = [touch locationInView:self];
//bound track point
trackPoint.x = fmax(p.x, kSliderPadding) ;
trackPoint.x = fmin(trackPoint.x, self.bounds.size.width - kSliderPadding);
[self setNeedsDisplay];
float_t x = trackPoint.x - kSliderPadding;
float_t delta = maximumValue - minimumValue;
float_t scalar = (x / (self.bounds.size.width - 2 * kSliderPadding)) ;
value = minimumValue + (delta * scalar);
[self sendActionsForControlEvents:UIControlEventValueChanged];
}
- (void)endTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
[self trackTouch:touch];
}
- (BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
CGPoint p = [touch locationInView:self];
trackPoint.x = fmax(p.x, kSliderPadding) ;
trackPoint.x = fmin(trackPoint.x, self.bounds.size.width - kSliderPadding);
[self setNeedsDisplay];
return YES;
}
- (BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event {
[self trackTouch:touch];
return YES;
}
@end
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