创建表格视图

创建表格方法,demo git地址

介绍： 本代码提供两种方式，让开发者更方便地创建一个表格视图，第一种方式是通过代理的方法实现整个视图的搭建，仿造UITableView模式进行编写，其功能强大；第二种方式是对第一种方式的一种封装，让开发者能更快速地实现视图的搭建，但对于过于个性的表格，建议采用第一种方式。

KWFormViewQuickBuilder.h

#import <Foundation/Foundation.h>#import "KWFormView.h"extern NSString *const noAction;extern NSString *const noColor;@interface KWFormViewQuickBuilder : NSObject- (KWFormView *)startCreatWithWidths:(NSArray *)widths startPoint:(CGPoint)point;- (void)setTextColor:(UIColor *)tcolor backgroundColor:(UIColor *)bcolor forRow:(NSInteger)row;- (void)setBorderColor:(UIColor *)color;- (void)setActionTarget:(id)target;- (void)addRecord:(NSArray *)record SELNames:(NSArray *)SELs;- (void)addRecord:(NSArray *)record;- (NSString *)valueAtcolumn:(NSInteger)column InRow:(NSInteger)row;@end

KWFromView

#import <UIKit/UIKit.h>@class KWFormView;typedef NS_ENUM(NSInteger, KWFormViewMode){    KWFormViewModeDefault,    KWFormViewModeLeft,    KWFormViewModeRight,    KWFormViewModeMiddle,};@protocol KWFormViewDataSource <NSObject>- (NSInteger)numberOfRowsInFormView:(KWFormView *)formView;- (NSInteger)formViewColumnsInRow:(KWFormView *)formView;- (CGFloat)formView:(KWFormView *)formView widthForColumn:(NSInteger)column;- (NSString *)formView:(KWFormView *)formView textForColumn:(NSInteger)column inRow:(NSInteger)row;@optional- (CGFloat)formView:(KWFormView *)formView heightForRow:(NSInteger)row;- (UIColor *)formView:(KWFormView *)formView colorOfColumn:(NSInteger)column inRow:(NSInteger)row;- (UIColor *)formView:(KWFormView *)formView contentColorOfColumn:(NSInteger)column inRow:(NSInteger)row;- (UIColor *)formViewBorderColor:(KWFormView *)formView;- (UIView *)formViewViewForFooter:(KWFormView *)formView;- (UIFont *)formViewFontOfContent:(KWFormView *)formView;- (BOOL)formView:(KWFormView *)formView addActionForColumn:(NSInteger)column inRow:(NSInteger)row;@end@protocol KWFormViewDelegate <NSObject>@optional- (void)formView:(KWFormView *)formView didSelectColumn:(NSInteger)column inRow:(NSInteger)row;@end@interface KWFormView : UIView@property (nonatomic, weak) id<KWFormViewDataSource> dataSource;@property (nonatomic, weak) id<KWFormViewDelegate> delegate;@property (nonatomic, assign) BOOL thickBorder;@property (nonatomic, assign ,readonly) KWFormViewMode mode;- (void)setMode:(KWFormViewMode)mode withMargin:(CGFloat)margin;- (UIButton *)itemAtColumn:(NSInteger)column inRow:(NSInteger)row;@end@interface UIImage (KWFormView)- (BOOL)hasAlpha;- (UIImage *)imageWithAlpha;- (UIImage *)transparentBorderImage:(NSUInteger)borderSize;- (UIImage *)imageByApplyingAlpha:(CGFloat)alpha;+ (UIImage *)imageFromColor:(UIColor *)color;@end

其中UIImage(KWFromView)是对UIImage的拓展,用于个性化生成图片

@interface UIImage ()- (CGImageRef)newBorderMask:(NSUInteger)borderSize size:(CGSize)size;@end@implementation UIImage (Alpha)- (BOOL)hasAlpha{    CGImageAlphaInfo alpha = CGImageGetAlphaInfo(self.CGImage);    return (alpha == kCGImageAlphaFirst ||            alpha == kCGImageAlphaLast ||            alpha == kCGImageAlphaPremultipliedFirst ||            alpha == kCGImageAlphaPremultipliedLast);}- (UIImage *)imageWithAlpha{    if ([self hasAlpha]) {        return self;    }        CGImageRef imageRef = self.CGImage;    size_t width = CGImageGetWidth(imageRef);    size_t height = CGImageGetHeight(imageRef);        // The bitsPerComponent and bitmapInfo values are hard-coded to prevent an "unsupported parameter combination" error    CGContextRef offscreenContext = CGBitmapContextCreate(NULL,                                                          width,                                                          height,                                                          8,                                                          0,                                                          CGImageGetColorSpace(imageRef),                                                          kCGBitmapByteOrderDefault | kCGImageAlphaPremultipliedFirst);        // Draw the image into the context and retrieve the new image, which will now have an alpha layer    CGContextDrawImage(offscreenContext, CGRectMake(0, 0, width, height), imageRef);    CGImageRef imageRefWithAlpha = CGBitmapContextCreateImage(offscreenContext);    UIImage *imageWithAlpha = [UIImage imageWithCGImage:imageRefWithAlpha];        // Clean up    CGContextRelease(offscreenContext);    CGImageRelease(imageRefWithAlpha);        return imageWithAlpha;}- (UIImage *)transparentBorderImage:(NSUInteger)borderSize{    // If the image does not have an alpha layer, add one    UIImage *image = [self imageWithAlpha];        CGRect newRect = CGRectMake(0, 0, image.size.width + borderSize * 2, image.size.height + borderSize * 2);        // Build a context that's the same dimensions as the new size    CGContextRef bitmap = CGBitmapContextCreate(NULL,                                                newRect.size.width,                                                newRect.size.height,                                                CGImageGetBitsPerComponent(self.CGImage),                                                0,                                                CGImageGetColorSpace(self.CGImage),                                                CGImageGetBitmapInfo(self.CGImage));        // Draw the image in the center of the context, leaving a gap around the edges    CGRect imageLocation = CGRectMake(borderSize, borderSize, image.size.width, image.size.height);    CGContextDrawImage(bitmap, imageLocation, self.CGImage);    CGImageRef borderImageRef = CGBitmapContextCreateImage(bitmap);        // Create a mask to make the border transparent, and combine it with the image    CGImageRef maskImageRef = [self newBorderMask:borderSize size:newRect.size];    CGImageRef transparentBorderImageRef = CGImageCreateWithMask(borderImageRef, maskImageRef);    UIImage *transparentBorderImage = [UIImage imageWithCGImage:transparentBorderImageRef];        // Clean up    CGContextRelease(bitmap);    CGImageRelease(borderImageRef);    CGImageRelease(maskImageRef);    CGImageRelease(transparentBorderImageRef);        return transparentBorderImage;}#pragma mark - Private helper methods- (CGImageRef)newBorderMask:(NSUInteger)borderSize size:(CGSize)size{    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();        // Build a context that's the same dimensions as the new size    CGContextRef maskContext = CGBitmapContextCreate(NULL,                                                     size.width,                                                     size.height,                                                     8, // 8-bit grayscale                                                     0,                                                     colorSpace,                                                     kCGBitmapByteOrderDefault | kCGImageAlphaNone);        // Start with a mask that's entirely transparent    CGContextSetFillColorWithColor(maskContext, [UIColor blackColor].CGColor);    CGContextFillRect(maskContext, CGRectMake(0, 0, size.width, size.height));        // Make the inner part (within the border) opaque    CGContextSetFillColorWithColor(maskContext, [UIColor whiteColor].CGColor);    CGContextFillRect(maskContext, CGRectMake(borderSize, borderSize, size.width - borderSize * 2, size.height - borderSize * 2));        // Get an image of the context    CGImageRef maskImageRef = CGBitmapContextCreateImage(maskContext);        // Clean up    CGContextRelease(maskContext);    CGColorSpaceRelease(colorSpace);        return maskImageRef;}- (UIImage *)imageByApplyingAlpha:(CGFloat) alpha{    UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0f);        CGContextRef ctx = UIGraphicsGetCurrentContext();    CGRect area = CGRectMake(0, 0, self.size.width, self.size.height);        CGContextScaleCTM(ctx, 1, -1);    CGContextTranslateCTM(ctx, 0, -area.size.height);        CGContextSetBlendMode(ctx, kCGBlendModeMultiply);        CGContextSetAlpha(ctx, alpha);        CGContextDrawImage(ctx, area, self.CGImage);        UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();        UIGraphicsEndImageContext();        return newImage;}+ (UIImage *)imageFromColor:(UIColor *)color{    CGSize size = CGSizeMake(20, 20);    UIGraphicsBeginImageContext(size);    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextSetFillColorWithColor(context, [color CGColor]);    CGContextFillRect(context, (CGRect){CGPointZero,size});    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    return img;}@end