iOS实现简易钟表

本文实例为大家分享了ios实现简易钟表的具体代码，供大家参考，具体内容如下

效果图：

注意：表盘是一个uiimageview控件，设置image为表盘图片

核心代码：

//
// viewcontroller.m
// 时钟
//
// created by llkj on 2017/8/29.
// copyright © 2017年 laynecheung. all rights reserved.
//

#import "viewcontroller.h"

//每一秒旋转多少度
#define perseca 6
//每一分旋转多少度
#define permina 6
//每一小时旋转多少度
#define perhoura 30

//每一分时针旋转的度数
#define perminhour 0.5
//角度转弧度
#define angle2rad(angle) ((angle) / 180.0 * m_pi)
@interface viewcontroller ()

@property (weak, nonatomic) iboutlet uiimageview *clockview;
@property (nonatomic, weak) calayer *secl;
@property (nonatomic, weak) calayer *minl;
@property (nonatomic, weak) calayer *hourl;
@end

@implementation viewcontroller

- (void)viewdidload {
 [super viewdidload];

 [self sethour];
 [self setmin];
 [self setsec];

 [nstimer scheduledtimerwithtimeinterval:1 target:self selector:@selector(timechange) userinfo:nil repeats:yes];
 [self timechange];
}

- (void)timechange{

 //获取当前秒
 nscalendar *cal = [nscalendar currentcalendar];
 nsdatecomponents *cmp = [cal components:nscalendarunitsecond | nscalendarunitminute | nscalendarunithour fromdate:[nsdate date]];
 nsinteger cursec = cmp.second + 1;
 nsinteger curmin = cmp.minute;
 nsinteger curhour = cmp.hour;

 //秒针开始旋转
 //计算秒针当前旋转的角度
 // angle = 当前多少秒 * 每一秒旋转多少度
 cgfloat seca = cursec * perseca;
 //旋转方向是z轴
 self.secl.transform = catransform3dmakerotation(angle2rad(seca), 0, 0, 1);


 //分针开始旋转
 //计算分针当前旋转的角度
 // angle = 当前多少分 * 每一分旋转多少度
 cgfloat mina = curmin * permina;
 self.minl.transform = catransform3dmakerotation(angle2rad(mina), 0, 0, 1);


 //时针开始旋转
 //计算时针当前旋转的角度
 // angle = 当前多少时 * 每一小时旋转多少度
 cgfloat houra = curhour * perhoura + curmin * perminhour;

 self.hourl.transform = catransform3dmakerotation(angle2rad(houra), 0, 0, 1);
}
//添加秒针
- (void)setsec{

 calayer *secl = [calayer layer];
 secl.bounds = cgrectmake(0, 0, 1, 80);
 secl.backgroundcolor = [uicolor redcolor].cgcolor;
 //绕着锚点旋转
 secl.anchorpoint = cgpointmake(0.5, 1);
 secl.position = cgpointmake(self.clockview.bounds.size.width * 0.5, self.clockview.bounds.size.height * 0.5);
 [self.clockview.layer addsublayer:secl];
 self.secl = secl;

}

//添加分针
- (void)setmin{

 calayer *minl = [calayer layer];
 minl.bounds = cgrectmake(0, 0, 3, 70);
 minl.cornerradius = 1.5;
 minl.backgroundcolor = [uicolor blackcolor].cgcolor;
 minl.anchorpoint = cgpointmake(0.5, 1);
 minl.position = cgpointmake(self.clockview.bounds.size.width * 0.5, self.clockview.bounds.size.height * 0.5);
 [self.clockview.layer addsublayer:minl];
 self.minl = minl;

}

//添加时针
- (void)sethour{

 calayer *hourl = [calayer layer];
 hourl.bounds = cgrectmake(0, 0, 3, 60);
 hourl.backgroundcolor = [uicolor blackcolor].cgcolor;
 hourl.anchorpoint = cgpointmake(0.5, 1);
 hourl.position = cgpointmake(self.clockview.bounds.size.width * 0.5, self.clockview.bounds.size.height * 0.5);
 [self.clockview.layer addsublayer:hourl];
 self.hourl = hourl;

}
- (void)didreceivememorywarning {
 [super didreceivememorywarning];
 // dispose of any resources that can be recreated.
}


@end

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。