4. Quartz2D 绘制文字

#pragma mark 绘制文字(中文)
-(void)drawText2:(CGContextRef)context{
    NSString *string = @"博阿士大夫撒风景撒开了房间撒";
    //1.获取字体
    NSLog(@"%@",[UIFont familyNames]);
    UIFont *font = [UIFont fontWithName:@"Marker Felt" size:20];
    //如果在UILabel中，可以将numbersOfLine设置0，并且指定足够的高度即可

    CGRect rect = CGRectMake(290, 10, 30, 440);
    [[UIColor lightGrayColor]set];
    UIRectFrame(rect);

    [[UIColor redColor]set];

    /*
     提示：在对齐方式的枚举中
     a. NSTextAlignmentJustified两端对齐
     b. NSTextAlignmentNatural
     以上两种对其方式不能使用
     */
    [string drawInRect:rect withFont:font lineBreakMode:(NSLineBreakByCharWrapping) alignment:(NSTextAlignmentLeft) ];

}

#pragma mark 绘制文字(英文)
-(void)drawText:(CGContextRef)context{
    NSString *string = @"Hello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello worldHello world";
    //1.获取字体
    NSLog(@"%@",[UIFont familyNames]);
    UIFont *font = [UIFont fontWithName:@"Marker Felt" size:40];
    //在指定点绘制字符串
    [string drawAtPoint:CGPointMake(50, 50) withFont:font];
    //如果在UILabel中，可以将numbersOfLine设置0，并且指定足够的高度即可

    CGRect rect = CGRectMake(50, 50, 270, 360);
    [[UIColor lightGrayColor]set];
    UIRectFrame(rect);

    [[UIColor redColor]set];

    /*
     提示：在对齐方式的枚举中
        a. NSTextAlignmentJustified两端对齐
        b. NSTextAlignmentNatural
     以上两种对其方式不能使用
     */
    [string drawInRect:rect withFont:font lineBreakMode:(NSLineBreakByWordWrapping) alignment:(NSTextAlignmentLeft) ];

}