发现 button设置背景图片 iOS7 与 iOS8 差异

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有待详细研究

iOS7: 只能显示 .titleLabel.textColor

<span style="color:#ff0000;">self.btnNum.titleLabel.textColor=[UIColor blueColor];</span>

iOS8: 只能显示 setTitleColor

<span style="color:#3366ff;">[self.btnNum setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];</span>

问题还未找到原由！有待观察。。。

代码如下：

//复用机制

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString * cellName=@"cell";        HYHistoryCell * historyCell=[_tableViewHistory dequeueReusableCellWithIdentifier:cellName];    if (historyCell==nil){                historyCell=[[HYHistoryCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellName];        historyCell.selectionStyle = UITableViewCellSelectionStyleNone;            }            NSDictionary * dic = [_arrRecord objectAtIndex:indexPath.row];                /*         * 期数         */        historyCell.labelIssue.text=[NSString stringWithFormat:@"第%@期",dic[@"issueNum"]];                /*         *  nums         */        historyCell.arrayNum=dic[@"result"];        historyCell.boundaryNum = _boundaryNum;        [historyCell createButtons];        return historyCell;}

//自定义cell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];    if (self){        // Initialization code                self.labelIssue=[[UILabel alloc]initWithFrame:CGRectMake(10, 0, 100, 30)];        self.labelIssue.text=@"期数";        self.labelIssue.textColor=[UIColor blackColor];        //        self.labelIssue.backgroundColor=[UIColor grayColor];        self.labelIssue.font=[UIFont systemFontOfSize:15.f];        [self.contentView addSubview:self.labelIssue];                self.arrayBtn = [[NSMutableArray alloc] init];    }        return self;}-(void)createButtons{    //移除之前赋值的btn    for (UIButton *button in self.arrayBtn) {        [button removeFromSuperview];    }    [self.arrayBtn removeAllObjects];        if ([self.arrayNum count]>0)    {        for (int i=0; i<[self.arrayNum count]; i++)        {            self.btnNum=[UIButton buttonWithType:UIButtonTypeCustom];            self.btnNum.enabled=NO;            self.btnNum.frame=CGRectMake(10+i*(BTNHEIGHT+2), 30, BTNWIDTH, BTNHEIGHT);            [self.btnNum setBackgroundImage:[UIImage imageNamed:@"small_circle_light"] forState:UIControlStateNormal];            [self.btnNum setTitle:[NSString stringWithFormat:@"%.2d",[[self.arrayNum objectAtIndex:i] intValue]] forState:UIControlStateNormal];            //根据界面判断字体模式            if ([_boundaryNum intValue] == 1) {                <span style="color:#ff0000;">self.btnNum.titleLabel.textColor=[UIColor blueColor];</span>                <span style="color:#3366ff;">[self.btnNum setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];</span>                if ([[self.arrayNum objectAtIndex:i] integerValue] == 19||[[self.arrayNum objectAtIndex:i] integerValue] == 20) {                    <span style="color:#3366ff;">[self.btnNum setTitleColor:[UIColor redColor] forState:UIControlStateNormal];</span>                    <span style="color:#ff0000;">self.btnNum.titleLabel.textColor=[UIColor redColor];</span>                }            }            else if([_boundaryNum intValue] == 2){                if (i < 6) {                [self.btnNum setTitleColor:[UIColor redColor] forState:UIControlStateNormal];                }                else{                     [self.btnNum setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];                }            }            else if([_boundaryNum intValue] == 3){               [self.btnNum setTitleColor:[UIColor redColor] forState:UIControlStateNormal];            }                        [self.contentView addSubview:self.btnNum];            [self.arrayBtn addObject:self.btnNum];                    }    }    }

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