iOS实现波浪效果

本文实例为大家分享了ios实现波浪效果的具体代码，供大家参考，具体内容如下

代码：

@interface viewcontroller () 
@property (strong, nonatomic) cadisplaylink *displaylink;
@property (strong, nonatomic) cashapelayer *shapelayer;
@property (strong, nonatomic) uibezierpath *path;
@property (strong, nonatomic) cashapelayer *shapelayer2;
@property (strong, nonatomic) uibezierpath *path2;
@end

@implementation viewcontroller

- (void)viewdidload {
 [super viewdidload]; 

 _shapelayer = [cashapelayer layer];
 _shapelayer.frame = cgrectmake(0, 100, 375, 150);
 [self.view.layer addsublayer:_shapelayer];
 

 _shapelayer2 = [cashapelayer layer];
 _shapelayer2.frame = cgrectmake(0, 100, 375, 150);
 [self.view.layer addsublayer:_shapelayer2];


 _shapelayer.fillcolor = [[uicolor yellowcolor] colorwithalphacomponent:0.3].cgcolor;
 _shapelayer2.fillcolor = [[uicolor bluecolor] colorwithalphacomponent:0.3].cgcolor; 

 _displaylink = [cadisplaylink displaylinkwithtarget:self selector:@selector(drawpath)];
 [_displaylink addtorunloop:[nsrunloop mainrunloop] formode:nsrunloopcommonmodes]; 

} 

- (void)drawpath {

 static double i = 0;
 
 cgfloat a = 10.f;//a振幅
 cgfloat k = 0;//y轴偏移
 cgfloat ω = 0.03;//角速度ω变大，则波形在x轴上收缩（波形变紧密）；角速度ω变小，则波形在x轴上延展（波形变稀疏）。不等于0
 cgfloat φ = 0 + i;//初相，x=0时的相位；反映在坐标系上则为图像的左右移动。

 //y=asin(ωx+φ)+k 

 _path = [uibezierpath bezierpath];
 _path2 = [uibezierpath bezierpath]; 

 [_path movetopoint:cgpointzero];
 [_path2 movetopoint:cgpointzero];
 for (int i = 0; i < 376; i ++) {

  cgfloat x = i;

  cgfloat y = a * sin(ω*x+φ)+k;
  cgfloat y2 = a * cos(ω*x+φ)+k;
  [_path addlinetopoint:cgpointmake(x, y)];
  [_path2 addlinetopoint:cgpointmake(x, y2)];

 }
 [_path addlinetopoint:cgpointmake(375, -100)];
 [_path addlinetopoint:cgpointmake(0, -100)];
 _path.linewidth = 1;
 _shapelayer.path = _path.cgpath; 

 [_path2 addlinetopoint:cgpointmake(375, -100)];
 [_path2 addlinetopoint:cgpointmake(0, -100)];
 _path2.linewidth = 1;

  _shapelayer2.path = _path2.cgpath;

 

 i += 0.1;

 if (i > m_pi * 2) {

  i = 0;//防止i越界

 }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。