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1、iOS應用開發(fā)——小畫板Demo代碼部分TouchView.h1#import???2??3@interface?TouchView?:?UIView??4{??5????NSMutableArray?*points;??6????NSArray?*points_all;??7????CGContextRef?context;??8????UIColor?*paint_clr;??9}??10@property?(strong,nonatomic)?NSMutableArray?*poin
2、ts;??11@property?(strong,nonatomic)?NSArray?*points_all;??12@property?(strong,nonatomic)?UIColor?*paint_clr;??13??14@end??TouchView.m1#import?"TouchView.h"??2??3@implementation?TouchView??4@synthesize?points,?points_all,?paint_clr;??5??6-?(id)initWithFrame:(CGRe
3、ct)frame??7{??8????self?=?[super?initWithFrame:frame];??9????if?(self)?{??10????????//?Initialization?code??11????????paint_clr?=?[UIColor?greenColor];??12????}??13????return?self;??14}??15??16//?Only?override?drawRect:?if?you?perform?custom?drawing.??17//?An?em
4、pty?implementation?adversely?affects?performance?during?animation.??18-?(void)drawRect:(CGRect)rect??19{??20????//?Drawing?code??21????if?((!self.points)?
5、
6、?(self.points.count?
7、text();??26????//設置畫筆粗細???27????CGContextSetLineWidth(context,?5.0f);??28????//設置畫筆顏色??29????//[[UIColor?blueColor]set?];??30????//?[paint_clr?set];??31????//CGContextSetStrokeColorWithColor(context,?[[UIColor?blueColor]CGColor]);??32????CGContextSetStrokeColorW
8、ithColor(context,?[paint_clr?CGColor]);??33??????34????//畫以前的軌跡??35????for?(int?j?=?0?;?j?
9、-1;i++)??39????????????{??40????????????????CGPoint?point1?=?[[points_tmp?objectAtIndex:i]?CGPointValue];??41????????????????CGPoint?point2?=?[[points_tmp?objectAtIndex:(i+1)]?CGPointValue];??42????????????????CGContextMoveToPoint(context,?point1.x,?point1.y);??
10、43????????????????CGContextAddLineToPoint(context,?point2.x,?point2.y);??44????????????????CGContextStrokePath(context);??45????????????}??46????????}??47??????48????
