iOS走马灯上下滚动显示文本
2024-04-25 07:05:01
在网上找到的大部分都是横向的走马灯效果，就自己动手谢了一个上下滚动的。说的准确一点的话可能不算走马灯，文本是有停留的，每次显示一条。不停留连续的走马灯效果正在研究，后期补上。
TableViewCell调用
NSArray * arr = @[@"qwer",@"12345",@"asdfg",@"54321",@"zxcvb",@"09877",@"567889"];dynamicMessageTableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:shoppersCell];if (cell == nil) {cell = [[dynamicMessageTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:shoppersCell dataArray:arr];}return cell;
Cell
#import "BTableViewCell.h"@interface dynamicMessageTableViewCell : BTableViewCell-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier dataArray:(NSArray *)titleArray;
//-(void)info:(NSArray *)titleArray;@endBBCyclingLabel
#import "dynamicMessageTableViewCell.h"
#import "BBCyclingLabel.h"@interface dynamicMessageTableViewCell()
{BBCyclingLabel * _bbCyclingLable;NSArray * _titleArr;UITextField * _text;int a;int _msgCount;}@end@implementation dynamicMessageTableViewCell
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier dataArray:(NSArray *)titleArray
{if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {_text = [[UITextField alloc] initWithFrame:CGRectMake(80, 0, SCREEN_WIDTH-80, 30)];_titleArr = [[NSArray alloc] init];_titleArr = titleArray;UIImageView *imagev = [[UIImageView alloc]initWithFrame:CGRectMake(20, 10, 50, 50)];[imagev setImage:GetImage(@"icon_notice.png")];[self addSubview:imagev];[self createUI];}return self;
}-(void)createUI
{_bbCyclingLable = [[BBCyclingLabel alloc]initWithFrame:CGRectMake(80, 0, SCREEN_WIDTH-80, 30) andTransitionType:BBCyclingLabelTransitionEffectScrollUp];// [_text addSubview:_bbCyclingLable];
// _text.borderStyle = UITextBorderStyleRoundedRect;
// [self addSubview:_text];[self addSubview:_bbCyclingLable];NSTimer *time = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(change) userInfo:nil repeats:YES];[time fire];a = 0;
}-(void)info:(NSArray *)titleArray
{_titleArr = titleArray;
}//数组中的内容仅供测试用，具体内容可以通过后台服务器获取或者写死（数据条数可以改变，我写的是3条）
-(void)change
{a++;if (0<=a && a<_titleArr.count) {_bbCyclingLable.text = [_titleArr objectAtIndex:a];}else{a=0;_bbCyclingLable.text = [_titleArr objectAtIndex:a];}
}//
// Copyright 2012 BiasedBit
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
////
// Created by Bruno de Carvalho -- @biasedbit / http://biasedbit.com
// Copyright (c) 2012 BiasedBit. All rights reserved.
//#pragma mark - Enumstypedef enum
{// User must provide pre-transition and transition blocksBBCyclingLabelTransitionEffectCustom = 0,BBCyclingLabelTransitionEffectFadeIn = 1 << 0,BBCyclingLabelTransitionEffectFadeOut = 1 << 1,BBCyclingLabelTransitionEffectCrossFade = BBCyclingLabelTransitionEffectFadeIn |BBCyclingLabelTransitionEffectFadeOut,BBCyclingLabelTransitionEffectZoomIn = 1 << 2,BBCyclingLabelTransitionEffectZoomOut = 1 << 3,BBCyclingLabelTransitionEffectScaleFadeOut = BBCyclingLabelTransitionEffectFadeIn |BBCyclingLabelTransitionEffectFadeOut |BBCyclingLabelTransitionEffectZoomOut,BBCyclingLabelTransitionEffectScaleFadeIn = BBCyclingLabelTransitionEffectFadeIn |BBCyclingLabelTransitionEffectFadeOut |BBCyclingLabelTransitionEffectZoomIn,// These two move the entering label from above/below to center and exiting label up/down without cross-fade// It's a good idea to set the clipsToBounds property of the BBCyclingLabel to true and use this in a confined spaceBBCyclingLabelTransitionEffectScrollUp = 1 << 4,BBCyclingLabelTransitionEffectScrollDown = 1 << 5,BBCyclingLabelTransitionEffectDefault = BBCyclingLabelTransitionEffectCrossFade
} BBCyclingLabelTransitionEffect;#pragma mark - Custom typestypedef void(^BBCyclingLabelPreTransitionBlock)(UILabel* labelToEnter);
typedef void(^BBCyclingLabelTransitionBlock)(UILabel* labelToExit, UILabel* labelToEnter);#pragma mark -@interface BBCyclingLabel : UIView#pragma mark Public properties@property(assign, nonatomic) BBCyclingLabelTransitionEffect transitionEffect;
@property(copy, nonatomic) BBCyclingLabelPreTransitionBlock preTransitionBlock;
@property(copy, nonatomic) BBCyclingLabelTransitionBlock transitionBlock;
@property(assign, nonatomic) NSTimeInterval transitionDuration;
// Same properties as UILabel, these will be propagated to the underlying labels
@property(copy, nonatomic) NSString* text;
@property(strong, nonatomic) UIFont* font;
@property(strong, nonatomic) UIColor* textColor;
@property(strong, nonatomic) UIColor* shadowColor;
@property(assign, nonatomic) CGSize shadowOffset;
@property(assign, nonatomic) UITextAlignment textAlignment;
@property(assign, nonatomic) UILineBreakMode lineBreakMode;
@property(assign, nonatomic) NSInteger numberOfLines;
@property(assign, nonatomic) BOOL adjustsFontSizeToFitWidth;
@property(assign, nonatomic) CGFloat minimumFontSize;
@property(assign, nonatomic) UIBaselineAdjustment baselineAdjustment;#pragma mark Creation- (id)initWithFrame:(CGRect)frame andTransitionType:(BBCyclingLabelTransitionEffect)transitionEffect;#pragma mark Public methods/*! Sets the text for the next label and performs a transition between current and next label (if animated is YES) */
- (void)setText:(NSString*)text animated:(BOOL)animated;@end
//
// Copyright 2012 BiasedBit
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
////
// Created by Bruno de Carvalho -- @biasedbit / http://biasedbit.com
// Copyright (c) 2012 BiasedBit. All rights reserved.
//#import "BBCyclingLabel.h"#pragma mark - ConstantsNSTimeInterval const kBBCyclingLabelDefaultTransitionDuration = 0.3;#pragma mark -@interface BBCyclingLabel ()
{NSUInteger _currentLabelIndex;
}#pragma mark Private properties@property(strong, nonatomic) NSArray* labels;
@property(strong, nonatomic) UILabel* currentLabel;#pragma mark Private helpers- (void)setupWithEffect:(BBCyclingLabelTransitionEffect)effect andDuration:(NSTimeInterval)duration;
- (void)prepareTransitionBlocks;
- (NSUInteger)nextLabelIndex;
- (void)resetLabel:(UILabel*)label;@end#pragma mark -@implementation BBCyclingLabel#pragma mark Property synthesizers@synthesize transitionEffect = _transitionEffect;
@synthesize preTransitionBlock = _preTransitionBlock;
@synthesize transitionBlock = _transitionBlock;
@synthesize transitionDuration = _transitionDuration;
// Private
@synthesize labels = _labels;
@synthesize currentLabel = _currentLabel;#pragma mark Creation- (id)initWithFrame:(CGRect)frame
{self = [super initWithFrame:frame];if (self != nil) {[self setupWithEffect:BBCyclingLabelTransitionEffectDefaultandDuration:kBBCyclingLabelDefaultTransitionDuration];}return self;
}- (id)initWithCoder:(NSCoder*)coder
{self = [super initWithCoder:coder];if (self != nil) {[self setupWithEffect:BBCyclingLabelTransitionEffectDefaultandDuration:kBBCyclingLabelDefaultTransitionDuration];}return self;
}- (id)initWithFrame:(CGRect)frame andTransitionType:(BBCyclingLabelTransitionEffect)transitionEffect;
{self = [super initWithFrame:frame];if (self != nil) {[self setupWithEffect:transitionEffectandDuration:kBBCyclingLabelDefaultTransitionDuration];}return self;
}#pragma mark Manual property accessors- (void)setTransitionEffect:(BBCyclingLabelTransitionEffect)transitionEffect
{_transitionEffect = transitionEffect;[self prepareTransitionBlocks];
}- (NSString*)text
{return _currentLabel.text;
}- (void)setText:(NSString*)text
{[self setText:text animated:YES];
}- (UIFont*)font
{return _currentLabel.font;
}- (void)setFont:(UIFont*)font
{for (UILabel* label in _labels) {label.font = font;}
}- (UIColor*)textColor
{return _currentLabel.textColor;
}- (void)setTextColor:(UIColor*)textColor
{for (UILabel* label in _labels) {label.textColor = textColor;}
}- (UIColor*)shadowColor
{return _currentLabel.shadowColor;
}- (void)setShadowColor:(UIColor*)shadowColor
{for (UILabel* label in _labels) {label.shadowColor = shadowColor;}
}- (CGSize)shadowOffset
{return _currentLabel.shadowOffset;
}- (void)setShadowOffset:(CGSize)shadowOffset
{for (UILabel* label in _labels) {label.shadowOffset = shadowOffset;}
}- (UITextAlignment)textAlignment
{return _currentLabel.textAlignment;
}- (void)setTextAlignment:(UITextAlignment)textAlignment
{for (UILabel* label in _labels) {label.textAlignment = textAlignment;}
}- (UILineBreakMode)lineBreakMode
{return _currentLabel.lineBreakMode;
}- (void)setLineBreakMode:(UILineBreakMode)lineBreakMode
{for (UILabel* label in _labels) {label.lineBreakMode = lineBreakMode;}
}- (NSInteger)numberOfLines
{return _currentLabel.numberOfLines;
}- (void)setNumberOfLines:(NSInteger)numberOfLines
{for (UILabel* label in _labels) {label.numberOfLines = numberOfLines;}
}- (BOOL)adjustsFontSizeToFitWidth
{return _currentLabel.adjustsFontSizeToFitWidth;
}- (void)setAdjustsFontSizeToFitWidth:(BOOL)adjustsFontSizeToFitWidth
{for (UILabel* label in _labels) {label.adjustsFontSizeToFitWidth = adjustsFontSizeToFitWidth;}
}- (CGFloat)minimumFontSize
{return _currentLabel.minimumFontSize;
}- (void)setMinimumFontSize:(CGFloat)minimumFontSize
{for (UILabel* label in _labels) {label.minimumFontSize = minimumFontSize;}
}- (UIBaselineAdjustment)baselineAdjustment
{return _currentLabel.baselineAdjustment;
}- (void)setBaselineAdjustment:(UIBaselineAdjustment)baselineAdjustment
{for (UILabel* label in _labels) {label.baselineAdjustment = baselineAdjustment;}
}#pragma mark Public methods- (void)setText:(NSString*)text animated:(BOOL)animated
{NSUInteger nextLabelIndex = [self nextLabelIndex];UILabel* nextLabel = [_labels objectAtIndex:nextLabelIndex];UILabel* previousLabel = _currentLabel;nextLabel.text = text;// Resetting the label state ensures we can change the transition type without extra code on pre-transition block.// Without it a transition that has no alpha changes would have to ensure alpha = 1 on pre-transition block (as// well as with every other possible animatable property)[self resetLabel:nextLabel];// Update both current label index and current label pointerself.currentLabel = nextLabel;_currentLabelIndex = nextLabelIndex;// Prepare the next label before the transition animationif (_preTransitionBlock != nil) {_preTransitionBlock(nextLabel);} else {// If no pre-transition block is set, prepare the next label for a cross-fadenextLabel.alpha = 0;}// Unhide the label that's about to be shownnextLabel.hidden = NO;void (^changeBlock)() = ^() {// Perform the user provided changesif (_transitionBlock != nil) {_transitionBlock(previousLabel, nextLabel);} else {// If no transition block is set, perform a simple cross-fadepreviousLabel.alpha = 0;nextLabel.alpha = 1;}};void (^completionBlock)(BOOL) = ^(BOOL finished) {if (finished) {// TODO this is kind of bugged since all transitions that include affine transforms always return finished// as true, even when it doesn't finish...previousLabel.hidden = YES;}};if (animated) {// Animate the transition between both labels[UIView animateWithDuration:_transitionDuration animations:changeBlock completion:completionBlock];} else {changeBlock();completionBlock(YES);}
}#pragma mark Private helpers- (void)setupWithEffect:(BBCyclingLabelTransitionEffect)effect andDuration:(NSTimeInterval)duration
{NSUInteger size = 2;NSMutableArray* labels = [NSMutableArray arrayWithCapacity:size];for (NSUInteger i = 0; i < size; i++) {UILabel* label = [[UILabel alloc] initWithFrame:self.bounds];[self addSubview:label];label.backgroundColor = [UIColor clearColor];label.hidden = YES;label.numberOfLines = 0;[labels addObject:label];}_currentLabelIndex = 0;self.currentLabel = [labels objectAtIndex:0];self.labels = labels;_currentLabel.hidden = NO;self.transitionEffect = effect;self.transitionDuration = duration;
}- (void)prepareTransitionBlocks
{//if matches customif (_transitionEffect == BBCyclingLabelTransitionEffectCustom) {return;}BBCyclingLabelTransitionEffect type = _transitionEffect;self.preTransitionBlock = ^(UILabel* labelToEnter) {if (type & BBCyclingLabelTransitionEffectFadeIn) {labelToEnter.alpha = 0;}if (type & BBCyclingLabelTransitionEffectZoomIn) {labelToEnter.transform = CGAffineTransformMakeScale(0.5, 0.5);}if (type & (BBCyclingLabelTransitionEffectScrollUp | BBCyclingLabelTransitionEffectScrollDown)) {CGRect frame = labelToEnter.frame;if (type & BBCyclingLabelTransitionEffectScrollUp) {frame.origin.y = self.bounds.size.height;}if (type & BBCyclingLabelTransitionEffectScrollDown) {frame.origin.y = 0 - frame.size.height;}labelToEnter.frame = frame;}};self.transitionBlock = ^(UILabel* labelToExit, UILabel* labelToEnter) {if (type & BBCyclingLabelTransitionEffectFadeIn) {labelToEnter.alpha = 1;}if (type & BBCyclingLabelTransitionEffectFadeOut) {labelToExit.alpha = 0;}if (type & BBCyclingLabelTransitionEffectZoomOut) {labelToExit.transform = CGAffineTransformMakeScale(1.5, 1.5);}if (type & BBCyclingLabelTransitionEffectZoomIn) {labelToEnter.transform = CGAffineTransformIdentity;}if (type & (BBCyclingLabelTransitionEffectScrollUp | BBCyclingLabelTransitionEffectScrollDown)) {CGRect frame = labelToExit.frame;CGRect enterFrame = labelToEnter.frame;if (type & BBCyclingLabelTransitionEffectScrollUp) {frame.origin.y = 0 - frame.size.height; enterFrame.origin.y = roundf((self.bounds.size.height / 2) - (enterFrame.size.height / 2));}if (type & BBCyclingLabelTransitionEffectScrollDown) {frame.origin.y = self.bounds.size.height;enterFrame.origin.y = roundf((self.bounds.size.height / 2) - (enterFrame.size.height / 2));}labelToExit.frame = frame;labelToEnter.frame = enterFrame;}};
}- (NSUInteger)nextLabelIndex
{return (_currentLabelIndex + 1) % [_labels count];
}- (void)resetLabel:(UILabel*)label
{label.alpha = 1;label.transform = CGAffineTransformIdentity;label.frame = self.bounds;
}@end
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