轉換OS X代碼到iOS

我想寫OS X代碼到iOS的Objective-C。我有爲OS X編寫的代碼，我想在iOS中使用該代碼。我不知道如何爲iOS編寫下面的代碼。我轉換下面的代碼，但我得到警告，只有一個可以請幫我在這轉換OS X代碼到iOS

OS X代碼

- (NSBitmapImageRep *) createImageRep:(NSSize)size 
{ 
    // Create an image rep that we can use as the backing store for the canvas. 
    // To keep things simple we'll use a 32-bit RGBA bitmap image. 
    int rowBytes = ((int)(ceil(size.width)) * 4 + 0x0000000F) & ~0x0000000F; // 16-byte aligned is good 
    NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil 
                 pixelsWide:size.width 
                 pixelsHigh:size.height 
                bitsPerSample:8 
                samplesPerPixel:4 
                  hasAlpha:YES 
                  isPlanar:NO 
                colorSpaceName:NSCalibratedRGBColorSpace 
                 bitmapFormat:NSAlphaNonpremultipliedBitmapFormat 
                 bytesPerRow:rowBytes 
                 bitsPerPixel:32]; 


    // Paint on a white background so the user has something to start with. 
    NSGraphicsContext* imageContext = [NSGraphicsContext graphicsContextWithBitmapImageRep:imageRep]; 

    // "Focus" our image rep so the NSImage will use it to draw into 
    [NSGraphicsContext saveGraphicsState]; 
    [NSGraphicsContext setCurrentContext:imageContext]; 

    [[NSColor whiteColor] set]; 
    [NSBezierPath fillRect: NSMakeRect(0, 0, size.width, size.height)]; 

    [NSGraphicsContext restoreGraphicsState]; 

    return imageRep; 
}

IOS代碼

- (CGImageRef) createImageRep:(CGSize)size 
{ 


    int rowBytes = ((int)(ceil(size.width)) * 4 + 0x0000000F) & ~0x0000000F; // 16-byte aligned is good 

    CGImageRef maskCreate = CGImageMaskCreate(CGImageGetWidth((mImageRep)), 
               CGImageGetHeight((mImageRep)), 
               CGImageGetBitsPerComponent((mImageRep)), 
               CGImageGetBitsPerPixel((mImageRep)), 
               CGImageGetBytesPerRow((mImageRep)), 
               CGImageGetDataProvider((mImageRep)), NULL, false); 




    // Create an image rep that we can use as the backing store for the canvas. 
    // To keep things simple we'll use a 32-bit RGBA bitmap image. 



    // Paint on a white background so the user has something to start with. 
    CGImageRef masked = CGImageCreateWithMask(maskCreate, maskCreate); 

    CGImageRelease(maskCreate); 

    UIImage *maskedImage = [UIImage imageWithCGImage:masked]; 
    UIGraphicsEndImageContext(); 
    [[UIColor whiteColor] set]; 
    [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, size.width, size.height)]; 


    return maskedImage.CGImage; 
}

我得到以下warning.Please幫我在這。

來源

2017-01-27 Uttam

請先嚐試自己。如果您在試用過程中遇到問題並描述實際問題。 – shallowThought

我試過但得到的問題任何人都可以請告訴我如何在IOS下面的代碼編寫NSGraphicsContext * imageContext = [NSGraphicsContext graphicsContextWithBitmapImageRep：imageRep]; – Uttam

https://s23.postimg.org/3ma5br66z/Screen_Shot_2017_01_27_at_2_24_00_PM.png – Uttam

該錯誤提示你的方法的衝突與先前聲明的返回類型。

你在MyCLass.m實現：

- (CGImageRef) createImageRep:(CGSize)size

你確實有先前聲明有不同的返回類型：

- (CGImageRef *) createImageRep:(CGSize)size ...

也許你已經添加了*意外。

檢查該聲明MyCLass.h頭文件：

- (CGImageRef *)createImageRep:(CGSize)size;

並刪除*：

- (CGImageRef)createImageRep:(CGSize)size;

來源

2017-01-27 10:42:27 shallowThought

轉換OS X代碼到iOS

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