一.自定義轉盤按鈕
// WheelBtn.h
#import <UIKit/UIKit.h>
@interface WheelBtn : UIButton
@end
// WheelBtn.m
#import "WheelBtn.h"
@implementation WheelBtn
-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
CGRect rect = CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height * 0.5);
if (CGRectContainsPoint(rect, point)) {
//在指定的範圍內
return [super hitTest:point withEvent:event];
}else {
return nil;
}
}
//返回當前按鈕當中ImageView的位置尺寸
//contentRect:當前按鈕的位置尺寸
-(CGRect)imageRectForContentRect:(CGRect)contentRect {
CGFloat w = 40;
CGFloat h= 48;
CGFloat x = (contentRect.size.width - w) * 0.5;
CGFloat y = 20;
return CGRectMake(x, y, w, h);
}
//返回當前按鈕當中Label的位置尺寸
//-(CGRect)titleRectForContentRect:(CGRect)contentRect {
//
//}
//取消按鈕高亮狀態下做的事
-(void)setHighlighted:(BOOL)highlighted {
}
@end
二.使用xib自定義轉盤View
// WheelView.h
#import <UIKit/UIKit.h>
@interface WheelView : UIView
//快速的創建一個轉盤
+ (instancetype)wheelView;
//讓轉盤開始旋轉
- (void)rotation;
//讓轉盤暫停旋轉
- (void)stop;
@end
// WheelView.m
#import "WheelView.h"
#import "WheelBtn.h"
#define angle2Rad(angle) ((angle) / 180.0 * M_PI)
@interface WheelView()
@property (weak, nonatomic) IBOutlet UIImageView *contentV;
/** 定時器 */
@property (nonatomic, strong) CADisplayLink *link;
//當前選中的按鈕
@property (nonatomic, weak) UIButton *selectBtn;
@end
@implementation WheelView
-(CADisplayLink *)link {
if (_link == nil) {
//添加定時器,保持一直旋轉
CADisplayLink *link = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)];
[link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
_link = link;
}
return _link;
}
+ (instancetype)wheelView {
return [[[NSBundle mainBundle] loadNibNamed:@"WheelView" owner:nil options:nil] lastObject];
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self = [[[NSBundle mainBundle] loadNibNamed:@"WheelView" owner:nil options:nil] lastObject];
}
return self;
}
-(void)awakeFromNib {
self.contentV.userInteractionEnabled = YES;
//添加轉盤的按鈕
CGFloat btnW = 68;
CGFloat btnH = 143;
CGFloat angle = 0;
//加載原始大圖片
UIImage *oriImage = [UIImage imageNamed:@"LuckyAstrology"];
//加載原始選中的大圖片
UIImage *oriSelImage = [UIImage imageNamed:@"LuckyAstrologyPressed"];
NSLog(@"%@",NSStringFromCGSize(oriImage.size));
CGFloat X = 0;
CGFloat Y = 0;
CGFloat clipW = oriImage.size.width / 12.0 * 2;
CGFloat clipH = oriImage.size.height * 2;
for(int i = 0; i < 12; i++) {
WheelBtn *btn = [WheelBtn buttonWithType:UIButtonTypeCustom];
btn.bounds = CGRectMake(0, 0, btnW, btnH);
//[btn setBackgroundColor:[UIColor redColor]];
//設置按鈕選中狀態下的背景圖片
[btn setBackgroundImage:[UIImage imageNamed:@"LuckyRototeSelected"] forState:UIControlStateSelected];
//給定一張圖片,截取指定區域範圍內的圖片,
X = i * clipW;
//CGImageCreateWithImageInRect,使用的座標都是以像素點,
//在ios當中使用的都是點座標.
CGImageRef clipImage = CGImageCreateWithImageInRect(oriImage.CGImage, CGRectMake(X, Y, clipW, clipH));
//設置按鈕正常狀態下顯示的圖片
[btn setImage:[UIImage imageWithCGImage:clipImage] forState:UIControlStateNormal];
CGImageRef clipSelImage = CGImageCreateWithImageInRect(oriSelImage.CGImage, CGRectMake(X, Y, clipW, clipH));
//設置按鈕選中狀態下顯示的圖片
[btn setImage:[UIImage imageWithCGImage:clipSelImage] forState:UIControlStateSelected];
//設置按鈕位置
btn.layer.anchorPoint = CGPointMake(0.5, 1);
btn.layer.position = CGPointMake(self.bounds.size.width * 0.5, self.bounds.size.height * 0.5);
//讓第一個按鈕在上一個基礎上面旋轉30.
btn.transform = CGAffineTransformMakeRotation(angle2Rad(angle));
angle += 30;
//監聽按鈕的點擊
[btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.contentV addSubview:btn];
//默認讓第一個成爲選中狀態
if (i == 0) {
[self btnClick:btn];
}
}
}
- (void)btnClick:(UIButton *)btn {
//讓當前點擊的按鈕成爲選中狀態
//1.讓當前選中的按鈕取消選中.
self.selectBtn.selected = NO;
//2.讓當前點擊的按鈕成爲選中狀態
btn.selected = YES;
//3.當前點擊的按鈕成爲選中狀態
self.selectBtn = btn;
}
//讓轉盤開始旋轉
- (void)rotation {
self.link.paused = NO;
// CABasicAnimation *anim = [CABasicAnimation animation];
// anim.keyPath = @"transform.rotation";
// anim.toValue = @(M_PI * 3);
// anim.duration = 5;
// anim.repeatCount = MAXFLOAT;
//
// [self.contentV.layer addAnimation:anim forKey:nil];
}
//讓轉盤暫停旋轉
- (void)stop {
self.link.paused = YES;
}
- (void)update {
self.contentV.transform = CGAffineTransformRotate(self.contentV.transform, M_PI / 300.0);
}
//開始選號
- (IBAction)startChoose:(id)sender {
//讓轉盤快速的旋轉幾圈,
CABasicAnimation *anim = [CABasicAnimation animation];
anim.keyPath = @"transform.rotation";
anim.toValue = @(M_PI * 4);
anim.duration = 0.5;
anim.delegate = self;
[self.contentV.layer addAnimation:anim forKey:nil];
//動畫結束時當前選中的按鈕指向最上方
}
//當動畫結束時調用
-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
//動畫結束時當前選中的按鈕指向最上方
//讓當前選中的按鈕的父控件倒着旋轉回去.
//獲取當前選中按鈕旋轉的角度
CGAffineTransform transform = self.selectBtn.transform;
//通過transform獲取當前旋轉的度數
CGFloat angle = atan2(transform.b, transform.a);
NSLog(@"%f",angle);
self.contentV.transform = CGAffineTransformMakeRotation(-angle);
}
@end
三.控制器.m文件如下
// ViewController.m
#import "ViewController.h"
#import "WheelView.h"
@interface ViewController ()
@property (nonatomic, weak) WheelView *wheelV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
WheelView *wheelV = [WheelView wheelView];
wheelV.center = self.view.center;
self.wheelV = wheelV;
[self.view addSubview:wheelV];
// WheelView *wheelV = [[WheelView alloc] init];
// wheelV.center = self.view.center;
// self.wheelV = wheelV;
// [self.view addSubview:wheelV];
}
- (IBAction)rotation:(id)sender {
[self.wheelV rotation];
}
- (IBAction)stop:(id)sender {
[self.wheelV stop];
}
@end
