设置透明色

_currenTable.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.55];

防止字体透明

//中文的地址处理

 NSString *URLString = [NSURL URLWithString:ktdemodel.img] ? ktdemodel.img : [self strUTF8Encoding:ktdemodel.img];

-(NSString *)strUTF8Encoding:(NSString *)str

{

    return [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

}