UIView使用UIMotionEffect效果

UIView使用UIMotionEffect效果

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這個效果在模擬器上看不了,所以無法截圖.

UIView+MotionEffect.h? +? UIView+MotionEffect.m

//
//  UIView+MotionEffect.h
//
//  Copyright (c) 2014年 Nick Jensen. All rights reserved.
//

#import <UIKit/UIKit.h>@interface UIView (MotionEffect)@property (nonatomic, strong) UIMotionEffectGroup  *effectGroup;- (void)addXAxisWithValue:(CGFloat)xValue YAxisWithValue:(CGFloat)yValue;
- (void)removeSelfMotionEffect;@end

//
//  UIView+MotionEffect.m
//
//  Copyright (c) 2014年 Nick Jensen. All rights reserved.
//

#import "UIView+MotionEffect.h"
#import <objc/runtime.h>static char motionEffectFlag;@implementation UIView (MotionEffect)-(void)setEffectGroup:(UIMotionEffectGroup *)effectGroup
{// 清除掉關聯objc_setAssociatedObject(self, &motionEffectFlag,nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);// 建立關聯objc_setAssociatedObject(self, &motionEffectFlag,effectGroup, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}-(UIMotionEffectGroup *)effectGroup
{// 返回關聯return objc_getAssociatedObject(self, &motionEffectFlag);
}- (void)addXAxisWithValue:(CGFloat)xValue YAxisWithValue:(CGFloat)yValue
{NSLog(@"%p", &motionEffectFlag);if ((xValue >= 0) && (yValue >= 0)){UIInterpolatingMotionEffect *xAxis = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];xAxis.minimumRelativeValue = @(-xValue);xAxis.maximumRelativeValue = @(xValue);UIInterpolatingMotionEffect *yAxis = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];yAxis.minimumRelativeValue = @(-yValue);yAxis.maximumRelativeValue = @(yValue);// 先移除效果再添加效果self.effectGroup.motionEffects = nil;[self removeMotionEffect:self.effectGroup];self.effectGroup.motionEffects = @[xAxis, yAxis];// 給view添加效果
        [self addMotionEffect:self.effectGroup];}
}- (void)removeSelfMotionEffect
{[self removeMotionEffect:self.effectGroup];
}@end

使用:

- (void)viewDidLoad {[super viewDidLoad];UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"show"]];[self.view addSubview:imageView];imageView.center = self.view.center;imageView.effectGroup = [UIMotionEffectGroup new];[imageView addXAxisWithValue:5.f YAxisWithValue:5.f];
}

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注意:

給類目添加屬性需要重寫setter.getter方法哦:)

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