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[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
self.transform=WKFlipCATransform3DPerspectSimpleWithRotate(rotateDegree);
...
[CATransaction commit];

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//
//  Macros.swift
//
//  Created by Xavier Muñiz on 6/12/14.

import Foundation


// dLog and aLog macros to abbreviate NSLog.
// Use like this:

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result = {
  'a': lambda x: x * 5,
  'b': lambda x: x + 7,
  'c': lambda x: x - 2
}.get(value,'')

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_maskLayer=[[CAGradientLayer layer]retain];
_maskLayer.frame=self.bounds;
_maskLayer.colors=@[(id)[UIColor colorWithRed:255/255.0f green:255.0f/255.0f blue:255/255.0f alpha:1.0f].CGColor,
             (id)[UIColor colorWithRed:255/255.0f green:255.0f/255.0f blue:255/255.0f alpha:0.0f].CGColor];
 _maskLayer.startPoint=CGPointMake(0.5, 0.3f);
_maskLayer.endPoint=CGPointMake(0.5f, 1.0f);
_maskLayer.locations=@[@0.0f,@1.0f];
self.layer.mask=_maskLayer;

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-(UIImage*)makeGradientImage{
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 1.0f);
    CGContextRef context=UIGraphicsGetCurrentContext();
    CGContextSaveGState(context);
    
    CGGradientRef myGradient;
    CGColorSpaceRef myColorspace;
    size_t num_locations = 2;
    CGFloat locations[2] = { 0.0, 1.0 };
    CGFloat components[8] = { 0.0,0.0,0.0, 0.0,  // Start color

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-(UIImage*)makeGradientImage{
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 1.0f);
    CGContextRef context=UIGraphicsGetCurrentContext();
    CGContextSaveGState(context);
    
    CGGradientRef myGradient;
    CGColorSpaceRef myColorspace;
    size_t num_locations = 2;
    CGFloat locations[2] = { 0.2, 0.9};
    CGFloat components[8] = { 0.0,0.0,0.0, 0.0,  // Start color

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///为UIView创建一个截图
static inline UIImage* WKFlip_make_image_for_view(UIView* view){
    double startTime=CFAbsoluteTimeGetCurrent();
    if(UIGraphicsBeginImageContextWithOptions != NULL){
        UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 0.0);
    } else {
        UIGraphicsBeginImageContext(view.frame.size);
    }
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage* image=UIGraphicsGetImageFromCurrentImageContext();

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///分割图片
static inline NSArray* WKFlip_make_hsplit_images_for_image(UIImage* image){
    CGSize halfSize=CGSizeMake(image.size.width, image.size.height/2);
    UIGraphicsBeginImageContext(halfSize);
    CGContextRef context=UIGraphicsGetCurrentContext();
    CGContextSaveGState(context);
    // Flip the coordinate system
    CGContextSetTextMatrix(context, CGAffineTransformIdentity); // 2-1
    CGContextTranslateCTM(context, 0, halfSize.height); // 3-1
    CGContextScaleCTM(context, 1.0, -1.0); // 4-1

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#define PATH_HOME NSHomeDirectory() ///获取主目录
#define PATH_TEMP NSTemporaryDirectory() ///获取临时目录
#define PATH_DOCUMENT NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDirectory, YES)[0] ///获取文档目录

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// 去掉前部的
void ltrim(char *s)
{
    long l=0,p=0,k=0;
    l = strlen(s);
    if( l == 0 ) return;
    p = 0;
    while( s[p] == ' ' || s[p] == '\t' )  p++;
    if( p == 0 ) return;
    while( s[k] != '\0') s[k++] = s[p++];