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：
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//
// 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
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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服务器之家。
原文链接：https://blog.csdn.net/u010981736/article/details/77679185