ios开发之文字扩散效果

太过爱你忘了你带给我的痛 2022-09-24 14:19 153阅读 0赞

# [ios开发之文字扩散效果][ios] #

\#import <UIKit/UIKit.h>  
  
@interface LightLabel : UILabel\{  
    float redValue\_;  
    float greenValue\_;  
    float blueValue\_;  
    float size\_;  
\}  
@property(assign,nonatomic)float redValue;  
@property(assign,nonatomic)float greenValue;  
@property(assign,nonatomic)float blueValue;  
@property(assign,nonatomic)float size;  
@end

\#import "LightLabel.h"  
  
@implementation LightLabel  
@synthesize redValue = redValue\_, greenValue = greenValue\_, blueValue = blueValue\_, size = size\_;  
  
\-(void)awakeFromNib\{  
    \[super awakeFromNib\];  
//    6 238 238  
    redValue\_   = 6.0/255.0f;  
    greenValue\_ = 238.0/255.0f;  
    blueValue\_  = 238.0/255.0f;  
    size\_       = 2.0f;  
\}  
\- (id)initWithFrame:(CGRect)frame  
\{  
    self = \[super initWithFrame:frame\];  
    if (self) \{  
        // Initialization code  
        redValue\_   = 6.0/255.0f;  
        greenValue\_ = 238.0/255.0f;  
        blueValue\_  = 238.0/255.0f;  
        size\_       = 2.0f;  
  
    \}  
    return self;  
\}  
  
\-(void) drawTextInRect: (CGRect)rect\{  
    //定义阴影区域  
    CGSize textShadowOffest = CGSizeMake(0, 0);  
    //定义RGB颜色值  
    float textColorValues\[\] = \{redValue\_, greenValue\_, blueValue\_, 1.0\};  
      
    //获取绘制上下文  
    CGContextRef ctx = UIGraphicsGetCurrentContext();  
    //保存上下文状态  
    CGContextSaveGState(ctx);  
      
    //为上下文设置阴影  
    CGContextSetShadow(ctx, textShadowOffest, size\_);  
    //设置颜色类型  
    CGColorSpaceRef textColorSpace = CGColorSpaceCreateDeviceRGB();  
    //根据颜色类型和颜色值创建CGColorRef颜色  
    CGColorRef textColor = CGColorCreate(textColorSpace, textColorValues);  
    //为上下文阴影设置颜色，阴影颜色，阴影大小  
    CGContextSetShadowWithColor(ctx, textShadowOffest, size\_, textColor);  
      
    \[super drawTextInRect:rect\];  
      
    //释放  
    CGColorRelease(textColor);  
    CGColorSpaceRelease(textColorSpace);  
      
    //重启上下文  
    CGContextRestoreGState(ctx);  
\}  
  
@end

[ios]: http://www.cnblogs.com/mtfh/p/3164743.html