u010716730的博客

(void)authenticateUser { //初始化上下文对象 LAContext* context = [[LAContext alloc] init]; //错误对象 NSError* error = nil; NSString* result = @”Authentication is needed to access your notes.”;//首先使用canEvalu

1.NSKernAttributeName:@10 调整字句 kerning 字句调整 2.NSFontAttributeName :[UIFont systemFontOfSize:_fontSize] 设置字体 3.NSForegroundColorAttributeName:[UIColor redColor] 设置文字颜色