UILabel的缩放效果

UILabel的缩放效果

 

效果图

 

源码

https://github.com/YouXianMing/Animations

////  ScaleLabel.h//  Animations////  Created by YouXianMing on 15/12/17.//  Copyright © 2015年 YouXianMing. All rights reserved.//#import <UIKit/UIKit.h>@interface ScaleLabel : UIView/** *  Label's text. */@property (nonatomic, strong) NSString *text;/** *  Label's color. */@property (nonatomic, strong) UIFont   *font;/** *  The Label's scale before the animation start. */@property (nonatomic, assign) CGFloat   startScale;/** *  The label's scale after the animation ended. */@property (nonatomic, assign) CGFloat   endScale;/** *  The show label's color. */@property (nonatomic, strong) UIColor  *backedLabelColor;/** *  The animated label's color. */@property (nonatomic, strong) UIColor  *colorLabelColor;/** *  Start animation. */- (void)startAnimation;@end

////  ScaleLabel.m//  Animations////  Created by YouXianMing on 15/12/17.//  Copyright © 2015年 YouXianMing. All rights reserved.//#import "ScaleLabel.h"@interface ScaleLabel ()@property (nonatomic, strong) UILabel  *backedLabel;@property (nonatomic, strong) UILabel  *colorLabel;@end@implementation ScaleLabel- (instancetype)initWithFrame:(CGRect)frame {        if (self = [super initWithFrame:frame]) {                _backedLabel = [[UILabel alloc] initWithFrame:self.bounds];        _colorLabel  = [[UILabel alloc] initWithFrame:self.bounds];                _backedLabel.alpha = 0;        _colorLabel.alpha  = 0;                _backedLabel.textAlignment = NSTextAlignmentCenter;        _colorLabel.textAlignment  = NSTextAlignmentCenter;                [self addSubview:_backedLabel];        [self addSubview:_colorLabel];    }        return self;}- (void)startAnimation {        if (_endScale == 0) {                _endScale = 2.f;    }        [UIView animateWithDuration:1 delay:0 usingSpringWithDamping:7 initialSpringVelocity:4 options:UIViewAnimationOptionCurveEaseInOut                     animations:^{                                                  _backedLabel.alpha     = 1.f;                         _backedLabel.transform = CGAffineTransformMake(1, 0, 0, 1, 0, 0);                                                  _colorLabel.alpha      = 1.f;                         _colorLabel.transform  = CGAffineTransformMake(1, 0, 0, 1, 0, 0);;                                              } completion:^(BOOL finished) {                                                  [UIView animateWithDuration:2 delay:0.5 usingSpringWithDamping:7 initialSpringVelocity:4                                             options:UIViewAnimationOptionCurveEaseInOut                                          animations:^{                                                                                            _colorLabel.alpha     = 0.f;                                              _colorLabel.transform = CGAffineTransformMake(_endScale, 0, 0, _endScale, 0, 0);                                                                                        } completion:nil];                     }];}#pragma mark - Overwrite getter & setter methods.@synthesize text = _text;- (void)setText:(NSString *)text {        _text             = text;    _backedLabel.text = text;    _colorLabel.text  = text;}- (NSString *)text {        return _text;}@synthesize startScale = _startScale;- (void)setStartScale:(CGFloat)startScale {        _startScale            = startScale;    _backedLabel.transform = CGAffineTransformMake(startScale, 0, 0, startScale, 0, 0);    _colorLabel.transform  = CGAffineTransformMake(startScale, 0, 0, startScale, 0, 0);}- (CGFloat)startScale {        return _startScale;}@synthesize font = _font;- (void)setFont:(UIFont *)font {        _font             = font;    _backedLabel.font = font;    _colorLabel.font  = font;}- (UIFont *)font {        return _font;}@synthesize backedLabelColor = _backedLabelColor;- (void)setBackedLabelColor:(UIColor *)backedLabelColor {        _backedLabelColor      = backedLabelColor;    _backedLabel.textColor = backedLabelColor;}@synthesize colorLabelColor = _colorLabelColor;- (void)setColorLabelColor:(UIColor *)colorLabelColor {        _colorLabelColor      = colorLabelColor;    _colorLabel.textColor = colorLabelColor;}@end

 

细节