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(guān)聯(lián)objc_setAssociatedObject(self, &motionEffectFlag,nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);// 建立關(guān)聯(lián)objc_setAssociatedObject(self, &motionEffectFlag,effectGroup, OBJC_ASSOCIATION_RETAIN_NONATOMIC); }-(UIMotionEffectGroup *)effectGroup {// 返回關(guān)聯(lián)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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