add Demo.

tingxins · Nov 8, 2016 · 68bddda · 68bddda
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diff --git a/TXScrollLabelView/TXScrollLabelView.h b/TXScrollLabelView/TXScrollLabelView.h
@@ -0,0 +1,42 @@
+//
+//  TXScrollLabelView.h
+//
+//  Created by tingxins on 2/23/16.
+//  Copyright © 2016 tingxins. All rights reserved.
+//  滚动视图
+
+typedef enum {
+    TXScrollLabelViewType_LR,
+    TXScrollLabelViewType_UD,
+    TXScrollLabelViewType_Flip,
+    TXScrollLabelViewType_FlipNoCle
+}TXScrollLabelViewType;
+
+#import <UIKit/UIKit.h>
+
+@interface TXScrollLabelView : UIScrollView
+
+#pragma mark - Property
+/** 滚动文字 */
+@property (copy, nonatomic) NSString *scrollTitle;
+/** 滚动类型 */
+@property (assign, nonatomic) TXScrollLabelViewType scrollType;
+/** 滚动速率 */
+@property (assign, nonatomic) NSTimeInterval scrollVelocity;
+
+#pragma mark - Methods
+/**
+ *  开始滚动
+ */
+- (void) beginScrolling;
+/**
+ *  停止滚动
+ */
+- (void) stopScrolling;
+
+/**
+ *  暂停滚动
+ */
+- (void) pauseScrolling;
+
+@end
diff --git a/TXScrollLabelView/TXScrollLabelView.m b/TXScrollLabelView/TXScrollLabelView.m
@@ -0,0 +1,273 @@
+//
+//  TXScrollLabelView.m
+//
+//  Created by tingxins on 2/23/16.
+//  Copyright © 2016 tingxins. All rights reserved.
+//
+#define TXScrollLabelFont [UIFont systemFontOfSize:14]
+#import "TXScrollLabelView.h"
+#import "UIView+TXFrame.h"
+#import <CoreText/CoreText.h>
+
+@interface TXScrollLabelView ()
+
+@property (weak, nonatomic) UILabel *scrollLabel0;
+
+@property (weak, nonatomic) UILabel *scrollLabel1;
+
+@property (weak, nonatomic) UITextView *scrollTextView;
+
+@property (strong, nonatomic) NSTimer *scrollTimer;
+
+@property (strong, nonatomic) NSArray *scrollArray;
+
+@end
+
+@implementation TXScrollLabelView
+
+- (NSArray *)scrollArray {
+    if (_scrollArray) return _scrollArray;
+    return _scrollArray = [self getSeparatedLinesFromLabel];
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    if (self = [super initWithFrame:frame]) {
+        self.backgroundColor = [UIColor blackColor];
+        UILabel *scrollLabel0 = [[UILabel alloc]init];
+        scrollLabel0.numberOfLines = 0;
+        self.scrollLabel0 = scrollLabel0;
+        self.scrollLabel0.font = TXScrollLabelFont;
+        self.scrollLabel0.textColor = [UIColor whiteColor];
+        [self addSubview:scrollLabel0];
+
+        UILabel *scrollLabel1 = [[UILabel alloc]init];
+        scrollLabel1.numberOfLines = 0;
+        self.scrollLabel1 = scrollLabel1;
+        self.scrollLabel1.font = TXScrollLabelFont;
+        self.scrollLabel1.textColor = [UIColor whiteColor];
+        [self addSubview:scrollLabel1];
+
+        scrollLabel0.lineBreakMode = NSLineBreakByWordWrapping;
+        scrollLabel1.lineBreakMode = NSLineBreakByWordWrapping;
+        scrollLabel0.textAlignment = NSTextAlignmentCenter;
+        scrollLabel1.textAlignment = NSTextAlignmentCenter;
+        self.scrollEnabled = NO;
+    }
+    return self;
+}
+
+- (void)setScrollTitle:(NSString *)scrollTitle {
+    _scrollTitle = [scrollTitle copy];
+
+    switch (self.scrollType) {
+        case TXScrollLabelViewType_LR:
+        {
+            CGSize scrollLabelS = [self.scrollTitle boundingRectWithSize:CGSizeMake(0, 30) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: TXScrollLabelFont} context:nil].size;
+            self.scrollLabel0.frame = CGRectMake(10, 0, scrollLabelS.width, 30);
+            self.scrollLabel0.text = self.scrollTitle;
+
+            self.scrollLabel1.frame = CGRectMake(CGRectGetMaxX(self.scrollLabel0.frame) + 20, 0, scrollLabelS.width, 30);
+            self.scrollLabel1.text = self.scrollTitle;
+            self.contentSize = CGSizeMake(scrollLabelS.width * 2 + 40, scrollLabelS.height);
+            CGFloat maxWidth = 200;
+            self.bounds = CGRectMake(0, 0, MIN(maxWidth, scrollLabelS.width), 30);
+        }
+            break;
+
+        case TXScrollLabelViewType_UD:
+        {
+
+            CGSize scrollLabelS = [self.scrollTitle boundingRectWithSize:CGSizeMake(200, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: TXScrollLabelFont} context:nil].size;
+            self.scrollLabel0.frame = CGRectMake(0, 0, scrollLabelS.width, scrollLabelS.height);
+            self.scrollLabel0.text = self.scrollTitle;
+
+            self.scrollLabel1.frame = CGRectMake(0, CGRectGetMaxY(self.scrollLabel0.frame), scrollLabelS.width, scrollLabelS.height);
+            self.scrollLabel1.text = self.scrollTitle;
+            self.contentSize = CGSizeMake(scrollLabelS.width, scrollLabelS.height * 2);
+            self.bounds = CGRectMake(0, 0, scrollLabelS.width, 30);
+        }
+            break;
+
+        case TXScrollLabelViewType_Flip:
+        {
+
+            CGSize scrollLabelS = [self.scrollTitle boundingRectWithSize:CGSizeMake(200, 30) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: TXScrollLabelFont} context:nil].size;
+            self.scrollLabel0.frame = CGRectMake(0, 0, scrollLabelS.width, 30);
+            self.scrollLabel0.text = self.scrollTitle;
+
+            self.scrollLabel1.frame = CGRectMake(0, CGRectGetMaxY(self.scrollLabel0.frame), scrollLabelS.width, 30);;
+            self.scrollLabel1.text = self.scrollTitle;
+            self.contentSize = CGSizeMake(scrollLabelS.width, scrollLabelS.height * 2);
+            self.bounds = CGRectMake(0, 0, scrollLabelS.width, 30);
+        }
+            break;
+
+
+        case TXScrollLabelViewType_FlipNoCle:
+        {
+            NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc]init];
+            paraStyle.lineSpacing = 10;
+            NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc] initWithString:_scrollTitle];
+            [attributedStr addAttributes:@{NSFontAttributeName:TXScrollLabelFont, NSParagraphStyleAttributeName:paraStyle} range:NSMakeRange(0, attributedStr.length)];
+
+            CGSize scrollLabelS = [attributedStr boundingRectWithSize:CGSizeMake(self.tx_width, 0) options:NSStringDrawingUsesLineFragmentOrigin context:nil].size;
+
+            self.scrollLabel0.frame = CGRectMake(0, 0, scrollLabelS.width, self.tx_height);
+            self.scrollLabel1.frame = CGRectMake(0, CGRectGetMaxY(self.scrollLabel0.frame), scrollLabelS.width, self.tx_height);
+
+            CGFloat width = scrollLabelS.width;
+            if (!self.tx_width) {
+                self.tx_width = width;
+            }
+            self.contentSize = CGSizeMake(self.tx_width, scrollLabelS.height * 2);
+            self.bounds = CGRectMake(0, 0, self.tx_width, self.tx_height);
+        }
+            break;
+
+        default:
+            break;
+    }
+}
+
+- (void)beginScrolling {
+    [self stopScrolling];
+    self.scrollTimer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateScrolling) userInfo:nil repeats:YES];
+    [[NSRunLoop mainRunLoop] addTimer:self.scrollTimer forMode:NSRunLoopCommonModes];
+}
+
+- (void)stopScrolling {
+    [self.scrollTimer invalidate];
+    self.scrollTimer = nil;
+}
+
+- (void)pauseScrolling {
+    [self.scrollTimer invalidate];
+    self.scrollTimer = nil;
+}
+
+- (void)updateScrolling {
+    switch (self.scrollType) {
+        case TXScrollLabelViewType_LR:
+        {
+            if (self.contentSize.width * 0.5 == self.contentOffset.x || self.contentOffset.x > self.contentSize.width * 0.5) {
+                [self stopScrolling];
+                self.contentOffset = CGPointMake(2, 0);//x增加偏移量，防止卡顿
+                [self beginScrolling];
+                return;
+            }
+            self.contentOffset = CGPointMake(self.contentOffset.x + 1, self.contentOffset.y);
+
+        }
+            break;
+
+        case TXScrollLabelViewType_UD:
+        {
+            if (self.contentOffset.y > self.scrollLabel0.frame.size.height) {
+                [self stopScrolling];
+                self.contentOffset = CGPointMake(0, 2);//y增加偏移量，防止卡顿
+                [self beginScrolling];
+                return;
+            }
+            self.contentOffset = CGPointMake(self.contentOffset.x, self.contentOffset.y + 1);
+
+        }
+            break;
+
+        case TXScrollLabelViewType_Flip:
+        {
+
+            [self stopScrolling];
+            self.scrollTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(updateScrolling) userInfo:nil repeats:YES];
+            [[NSRunLoop mainRunLoop] addTimer:self.scrollTimer forMode:NSRunLoopCommonModes];
+
+            [self flipAnimationWithDelay:0];
+        }
+            break;
+
+        case TXScrollLabelViewType_FlipNoCle:
+        {
+
+            [self stopScrolling];
+            NSTimeInterval velocity = self.scrollVelocity ? self.scrollVelocity : 2;
+
+            self.scrollTimer = [NSTimer scheduledTimerWithTimeInterval:velocity target:self selector:@selector(updateScrolling) userInfo:nil repeats:YES];
+            [[NSRunLoop mainRunLoop] addTimer:self.scrollTimer forMode:NSRunLoopCommonModes];
+
+            [self flipNoCleAnimationWithDelay:velocity];
+        }
+            break;
+
+        default:
+            break;
+    }
+}
+
+- (void)flipAnimationWithDelay:(NSTimeInterval)delay {
+    [UIView transitionWithView:self.scrollLabel0 duration:delay * 0.5 options:UIViewAnimationOptionTransitionFlipFromTop animations:^{
+        self.scrollLabel0.tx_bottom = 0;
+        [UIView transitionWithView:self.scrollLabel0 duration:delay * 0.5 options:UIViewAnimationOptionTransitionFlipFromTop animations:^{
+            self.scrollLabel1.tx_y = 0;
+        } completion:^(BOOL finished) {
+            self.scrollLabel0.tx_y = self.tx_height;
+            UILabel *tempLabel = self.scrollLabel0;
+            self.scrollLabel0 = self.scrollLabel1;
+            self.scrollLabel1 = tempLabel;
+        }];
+    } completion:nil];
+}
+
+- (void)flipNoCleAnimationWithDelay:(NSTimeInterval)delay {
+    static int count = 0;
+
+    self.scrollLabel0.text = self.scrollArray[count];
+
+    count ++;
+
+    if (count == self.scrollArray.count) count = 0;
+
+    self.scrollLabel1.text = self.scrollArray[count];
+
+    [self flipAnimationWithDelay:delay];
+}
+
+#pragma mark - 文字分行
+
+-(NSArray *)getSeparatedLinesFromLabel {
+
+    NSString *text = _scrollTitle;
+    UIFont *font = [UIFont systemFontOfSize:15];
+
+    CTFontRef myFont = CTFontCreateWithName((__bridge CFStringRef)([font fontName]), [font pointSize], NULL);
+
+    NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithString:text];
+
+    [attStr addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)myFont range:NSMakeRange(0, attStr.length)];
+
+    CTFramesetterRef frameSetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attStr);
+
+    CGMutablePathRef path = CGPathCreateMutable();
+
+    CGPathAddRect(path, NULL, CGRectMake(0,0,self.tx_width,100000));
+
+    CTFrameRef frame = CTFramesetterCreateFrame(frameSetter, CFRangeMake(0, 0), path, NULL);
+
+    NSArray *lines = (__bridge NSArray *)CTFrameGetLines(frame);
+
+    NSMutableArray *linesArray = [[NSMutableArray alloc]init];
+
+    for (id line in lines) {
+
+        CTLineRef lineRef = (__bridge CTLineRef )line;
+
+        CFRange lineRange = CTLineGetStringRange(lineRef);
+
+        NSRange range = NSMakeRange(lineRange.location, lineRange.length);
+
+        NSString *lineString = [text substringWithRange:range];
+
+        [linesArray addObject:lineString];
+    }
+    return (NSArray *)linesArray;
+}
+
+@end
diff --git a/TXScrollLabelView/UIView+TXFrame.h b/TXScrollLabelView/UIView+TXFrame.h
@@ -0,0 +1,32 @@
+//
+//  UIView+TXFrame.h
+//  TXSwipeTableViewTest
+//
+//  Created by tingxins on 9/1/16.
+//  Copyright © 2016 tingxins. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIView (TXFrame)
+/** 设置x值 */
+@property (assign, nonatomic) CGFloat tx_x;
+/** 设置y值 */
+@property (assign, nonatomic) CGFloat tx_y;
+/** 设置width */
+@property (assign, nonatomic) CGFloat tx_width;
+/** 设置height */
+@property (assign, nonatomic) CGFloat tx_height;
+/** 设置size */
+@property (assign, nonatomic) CGSize  tx_size;
+/** 设置origin */
+@property (assign, nonatomic) CGPoint tx_origin;
+/** 设置center */
+@property (assign, nonatomic) CGPoint tx_center;
+/** 设置center.x */
+@property (assign, nonatomic) CGFloat tx_centerX;
+/** 设置center.y */
+@property (assign, nonatomic) CGFloat tx_centerY;
+/** 设置bottom */
+@property (assign, nonatomic) CGFloat tx_bottom;
+@end