128 lines
4.5 KiB
Objective-C
Executable File
128 lines
4.5 KiB
Objective-C
Executable File
//
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// GYChangeTextView.m
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// GYShop
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//
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// Created by mac on 16/6/13.
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// Copyright © 2016年 GY. All rights reserved.
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//
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#import "GYChangeTextView.h"
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static const CGFloat DealyWhenTileInMiddle = 3.0;
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static const CGFloat DealyWhenTileInBottom = 0.0;
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#define IifshAnimationTextColor [UIColor colorWithRed:153.0/256.0 green:153.0/256.0 blue:153.0/256.0 alpha:1]
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typedef NS_ENUM(NSUInteger, GYTitlePosition) {
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GYTitlePositionTop = 1,
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GYTitlePositionMiddle = 2,
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GYTitlePositionBottom = 3
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};
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@interface GYChangeTextView ()
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@property (nonatomic, strong) UILabel *textLabel;
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@property (nonatomic, strong) NSArray *contentsAry;
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@property (nonatomic, assign) CGPoint topPosition;
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@property (nonatomic, assign) CGPoint middlePosition;
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@property (nonatomic, assign) CGPoint bottomPosition;
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/*
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*1.控制延迟时间，当文字在中间时，延时时间长一些，如5秒，这样可以让用户浏览清楚内容；
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*2.当文字隐藏在底部的时候，不需要延迟，这样衔接才流畅；
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*3.通过上面的静态变量更改需要的值
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*/
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@property (nonatomic, assign) CGFloat needDealy;
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@property (nonatomic, assign) NSInteger currentIndex; /*当前播放到那个标题了*/
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@property (nonatomic, assign) BOOL shouldStop; /*是否停止*/
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@end
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@implementation GYChangeTextView
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- (instancetype)initWithFrame:(CGRect)frame {
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self = [super initWithFrame:frame];
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if (self) {
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self.topPosition = CGPointMake(self.frame.size.width/2, -self.frame.size.height/2);
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self.middlePosition = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
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self.bottomPosition = CGPointMake(self.frame.size.width/2, self.frame.size.height/2*3);
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//self.shouldStop = NO;
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_textLabel = [[UILabel alloc] init];
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_textLabel.layer.bounds = CGRectMake(0, 0, CGRectGetWidth(frame), CGRectGetHeight(frame));
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_textLabel.layer.position = self.middlePosition;
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_textLabel.textAlignment = NSTextAlignmentCenter;
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_textLabel.textColor = IifshAnimationTextColor;
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[self addSubview:_textLabel];
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self.clipsToBounds = YES; /*保证文字不跑出视图*/
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self.needDealy = DealyWhenTileInMiddle; /*控制第一次显示时间*/
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self.currentIndex = 0;
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}
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return self;
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}
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- (void)animationWithTexts:(NSArray *)textAry {
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self.contentsAry = textAry;
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self.textLabel.text = [textAry objectAtIndex:0];
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}
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-(void)startTextAnimation
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{
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self.shouldStop = NO;
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[self startAnimation];
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}
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- (void)startAnimation {
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__weak typeof(self) weakSelf = self;
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[UIView animateWithDuration:0.3 delay:self.needDealy options:UIViewAnimationOptionCurveEaseInOut animations:^{
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if ([weakSelf currentTitlePosition] == GYTitlePositionMiddle) {
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weakSelf.textLabel.layer.position = weakSelf.topPosition;
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} else if ([weakSelf currentTitlePosition] == GYTitlePositionBottom) {
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weakSelf.textLabel.layer.position = weakSelf.middlePosition;
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}
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} completion:^(BOOL finished) {
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if ([weakSelf currentTitlePosition] == GYTitlePositionTop) {
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weakSelf.textLabel.layer.position = weakSelf.bottomPosition;
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weakSelf.needDealy = DealyWhenTileInBottom;
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weakSelf.currentIndex ++;
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weakSelf.textLabel.text = [weakSelf.contentsAry objectAtIndex:[weakSelf realCurrentIndex]];
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} else {
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weakSelf.needDealy = DealyWhenTileInMiddle;
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}
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if (!weakSelf.shouldStop) {
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[weakSelf startAnimation];
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} else { //停止动画后，要设置label位置和label显示内容
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weakSelf.textLabel.layer.position = weakSelf.middlePosition;
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weakSelf.textLabel.text = [weakSelf.contentsAry objectAtIndex:[weakSelf realCurrentIndex]];
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}
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}];
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}
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- (void)stopAnimation {
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self.shouldStop = YES;
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self.currentIndex = 0;
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_textLabel.layer.position = self.middlePosition;
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}
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- (NSInteger)realCurrentIndex {
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return self.currentIndex % [self.contentsAry count];
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}
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- (GYTitlePosition)currentTitlePosition {
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if (self.textLabel.layer.position.y == self.topPosition.y) {
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return GYTitlePositionTop;
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} else if (self.textLabel.layer.position.y == self.middlePosition.y) {
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return GYTitlePositionMiddle;
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}
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return GYTitlePositionBottom;
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}
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- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
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if ([self.delegate respondsToSelector:@selector(gyChangeTextView:didTapedAtIndex:)]) {
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[self.delegate gyChangeTextView:self didTapedAtIndex:[self realCurrentIndex]];
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}
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}
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@end
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