计算字体大小的方法

在messageFrame模型的set方法中计算子控件的frame,计算frame的同时,还要在自定义cell中设置时间居中和字体大小

按钮的文字为黑色,字体大小,不换行。

- (void)setMessage:(JSMessage*)message

{

_message= message;//计算frame

CGFloatmargin =10;//时间

CGFloattimeX =0;

CGFloattimeY =0;

CGFloattimeW =320;

CGFloattimeH =40;

_timeF=CGRectMake(timeX, timeY, timeW, timeH);

分区第八天(QQ聊天)的第4页

_timeF=CGRectMake(timeX, timeY, timeW, timeH);//头像

CGFloaticonW =50;

CGFloaticonH =50;

CGFloaticonY =CGRectGetMaxY(self.timeF);CGFloaticonX;

if(self.message.type==JSMessageTypeSelf) {

iconX =320- iconW - margin;

} else {

iconX = margin;

}

_iconF=CGRectMake(iconX, iconY, iconW, iconH);//消息

CGSizetextMaxSize =CGSizeMake(200,MAXFLOAT);

CGSizetextSize = [selfsizeWithText:self.message.text font:[UIFont

systemFontOfSize:14]maxSize:textMaxSize];

CGFloattextX =0;

CGFloattextY = iconY;

if(self.message.type==JSMessageTypeSelf) {

textX = iconX - textSize.width- margin;

} else {

textX =CGRectGetMaxX(self.iconF) + margin;

}

_textF=CGRectMake(textX, textY, textSize.width, textSize.height);

CGFloattextMaxH =CGRectGetMaxY(self.textF);CGFloaticonMaxH =CGRectGetMaxY(self.iconF); _rowHeight=MAX(textMaxH, iconMaxH) + margin;

}

- (CGSize)sizeWithText:(NSString*)text font:(UIFont*)font maxSize:(CGSize)maxSize

{

NSDictionary*atts =@{NSFontAttributeName:font};

return[textboundingRectWithSize:maxSizeoptions:NSStringDrawingUsesLineFragmentOrigin attributes:attscontext:nil].size;

}