iOS 自定義MJRefresh下拉重新整理動畫

**實現如下

mjrefreshgifheader繼承自mj中的mjrefreshgifheader

#import
"mjrefreshgifheader.h"
@inte***ce customrefreshgifheader : mjrefreshgifheader
/** 設定state狀態下的動畫images 動畫持續時間duration*/
- (void)setimages:(nsarray *)images duration:(nstimeinterval)duration forstate:(mjrefreshstate)state;
- (void)setimages:(nsarray *)images forstate:(mjrefreshstate)state;
@end

#import "customrefreshgifheader.h"

#define width   [uiscreen mainscreen].bounds.size.width
@inte***ce
customrefreshgifheader()
//一直左滑動的動畫
@property (nonatomic, strong) uiview *bgview;
//頂部的
@property (nonatomic, strong) uiimageview *topimage;
//自定義的重新整理提示狀態
@property (nonatomic, strong) uilabel *customstatuslable;
//跑動的imagev
@property (nonatomic, strong) uiimageview *customimagev;
//重寫父類
@property (strong, nonatomic) nsmutabledictionary *stateimages;
//重寫父類
@property (strong, nonatomic) nsmutabledictionary *statedurations;
@end
@implementation
customrefreshgifheader
#pragma mark - 懶載入
- (uiimageview *)topimage 
return _topimage;
}- (uiview *)bgview 
}return _bgview;
}- (uiimageview *)customimagev 
return _customimagev;
}- (nsmutabledictionary *)stateimages 
return _stateimages;
}- (nsmutabledictionary *)statedurations 
return _statedurations;
}#pragma mark - 公共方法
//重寫動畫實現
- (void)setimages:(nsarray *)images duration:(nstimeinterval)duration forstate:(mjrefreshstate)state 
}- (void)setimages:(nsarray *)images forstate:(mjrefreshstate)state 
#pragma mark - 實現父類的方法
//初始化操作
- (void)prepare 
///重寫mj百分比
- (void)setpullingpercent:(cgfloat)pullingpercent 
}self
.customimagev
.frame = cgrectmake(width * 0.2  * pullingpercent ,  60 * (1 - pullingpercent), 60 * pullingpercent, 60 * pullingpercent);
if (self
.bgview
.layer
.animationkeys
.count == 0) 
nsarray *images = self
.stateimages[@(mjrefreshstateidle)];
if (self
.state != mjrefreshstateidle || images.count == 0) return;
[self
.customimagev stopanimating];
nsuinteger index =  images.count * pullingpercent;
if (index >= images.count) index = images.count - 1;
self
.customimagev
.image = images[index];
[self layoutsubviews];
}//新的動畫frame不在根據placesubviews調整, 而是在拖動百分比中設定
- (void)placesubviews 
- (void)setstate:(mjrefreshstate)state 
//自定義位置的提示重新整理狀態始終跟父類的保持一致
self
.customstatuslable
.text = self
.statelabel
.text;
if (state == mjrefreshstatepulling || state == mjrefreshstaterefreshing)  else 
} else
if (state == mjrefreshstateidle) 
}//主要效果就是實現當重新整理狀態完成時仍然能夠保持動畫完成.
- (void)endrefreshing  completion:^(bool finished) );
});}];
}#pragma mark    animation
- (cabasicanimation *)creatanimation 
- (uilabel *)customstatuslable 
return _customstatuslable;
}- (void)dealloc 
@end

demo位址

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